./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8 --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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- 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-2329fc7 [2022-12-13 11:55:22,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:55:22,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:55:22,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:55:22,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:55:22,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:55:22,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:55:22,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:55:22,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:55:22,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:55:22,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:55:22,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:55:22,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:55:22,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:55:22,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:55:22,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:55:22,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:55:22,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:55:22,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:55:22,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:55:22,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:55:22,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:55:22,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:55:22,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:55:22,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:55:22,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:55:22,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:55:22,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:55:22,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:55:22,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:55:22,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:55:22,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:55:22,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:55:22,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:55:22,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:55:22,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:55:22,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:55:22,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:55:22,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:55:22,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:55:22,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:55:22,818 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:55:22,843 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:55:22,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:55:22,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:55:22,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:55:22,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:55:22,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:55:22,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:55:22,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:55:22,846 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:55:22,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:55:22,846 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:55:22,847 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:55:22,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:55:22,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:55:22,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:55:22,847 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:55:22,847 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:55:22,848 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:55:22,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:55:22,848 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:55:22,848 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:55:22,848 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:55:22,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:55:22,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:55:22,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:55:22,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:55:22,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:55:22,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:55:22,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:55:22,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:55:22,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:55:22,850 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:55:22,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:55:22,851 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:55:22,851 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_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-12-13 11:55:23,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:55:23,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:55:23,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:55:23,071 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:55:23,071 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:55:23,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-12-13 11:55:25,560 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:55:25,738 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:55:25,738 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-12-13 11:55:25,742 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/data/f80fda300/53dd2c77bcd443d18d2604ffd90d697e/FLAGfae2e428c [2022-12-13 11:55:26,135 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/data/f80fda300/53dd2c77bcd443d18d2604ffd90d697e [2022-12-13 11:55:26,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:55:26,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:55:26,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:55:26,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:55:26,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:55:26,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@341b8ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26, skipping insertion in model container [2022-12-13 11:55:26,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:55:26,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:55:26,278 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:26,279 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:26,282 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:26,283 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:26,289 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_809e5313-10f8-4320-b359-3f9086119c9e/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-12-13 11:55:26,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:55:26,299 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:55:26,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:26,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:26,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:26,312 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:26,315 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_809e5313-10f8-4320-b359-3f9086119c9e/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-12-13 11:55:26,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:55:26,327 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:55:26,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26 WrapperNode [2022-12-13 11:55:26,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:55:26,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:55:26,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:55:26,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:55:26,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,358 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-12-13 11:55:26,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:55:26,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:55:26,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:55:26,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:55:26,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,376 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:55:26,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:55:26,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:55:26,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:55:26,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (1/1) ... [2022-12-13 11:55:26,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:55:26,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:26,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:55:26,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:55:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:55:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:55:26,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:55:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:55:26,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:55:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:55:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:55:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:55:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:55:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:55:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:55:26,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:55:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:55:26,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:55:26,435 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:55:26,504 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:55:26,505 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:55:26,652 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:55:26,673 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:55:26,673 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 11:55:26,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:55:26 BoogieIcfgContainer [2022-12-13 11:55:26,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:55:26,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:55:26,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:55:26,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:55:26,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:55:26" (1/3) ... [2022-12-13 11:55:26,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0ab99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:55:26, skipping insertion in model container [2022-12-13 11:55:26,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:26" (2/3) ... [2022-12-13 11:55:26,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0ab99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:55:26, skipping insertion in model container [2022-12-13 11:55:26,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:55:26" (3/3) ... [2022-12-13 11:55:26,681 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-12-13 11:55:26,694 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:55:26,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 11:55:26,694 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:55:26,745 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 11:55:26,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 99 transitions, 214 flow [2022-12-13 11:55:26,830 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2022-12-13 11:55:26,831 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:55:26,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2022-12-13 11:55:26,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 99 transitions, 214 flow [2022-12-13 11:55:26,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 196 flow [2022-12-13 11:55:26,840 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:55:26,849 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 92 transitions, 196 flow [2022-12-13 11:55:26,852 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 92 transitions, 196 flow [2022-12-13 11:55:26,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 196 flow [2022-12-13 11:55:26,868 INFO L130 PetriNetUnfolder]: 6/92 cut-off events. [2022-12-13 11:55:26,868 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:55:26,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 6/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2022-12-13 11:55:26,869 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2022-12-13 11:55:29,117 INFO L134 LiptonReduction]: Checked pairs total: 784 [2022-12-13 11:55:29,118 INFO L136 LiptonReduction]: Total number of compositions: 92 [2022-12-13 11:55:29,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:55:29,137 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;@5f619ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:55:29,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-13 11:55:29,139 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 11:55:29,139 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:55:29,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:29,139 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 11:55:29,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash 388, now seen corresponding path program 1 times [2022-12-13 11:55:29,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:29,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143845673] [2022-12-13 11:55:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:29,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:29,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143845673] [2022-12-13 11:55:29,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143845673] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:29,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:29,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 11:55:29,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473750575] [2022-12-13 11:55:29,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:29,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 11:55:29,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:29,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 11:55:29,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:55:29,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 191 [2022-12-13 11:55:29,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:29,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 191 [2022-12-13 11:55:29,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:29,321 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2022-12-13 11:55:29,321 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 11:55:29,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 504 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2022-12-13 11:55:29,324 INFO L137 encePairwiseOnDemand]: 188/191 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2022-12-13 11:55:29,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2022-12-13 11:55:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 11:55:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 11:55:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 200 transitions. [2022-12-13 11:55:29,336 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5235602094240838 [2022-12-13 11:55:29,337 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 200 transitions. [2022-12-13 11:55:29,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 200 transitions. [2022-12-13 11:55:29,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:29,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 200 transitions. [2022-12-13 11:55:29,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 100.0) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,348 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,350 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 200 transitions. [2022-12-13 11:55:29,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2022-12-13 11:55:29,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 11:55:29,354 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2022-12-13 11:55:29,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2022-12-13 11:55:29,359 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-12-13 11:55:29,360 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2022-12-13 11:55:29,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:29,360 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:55:29,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:55:29,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:29,362 INFO L85 PathProgramCache]: Analyzing trace with hash 382379, now seen corresponding path program 1 times [2022-12-13 11:55:29,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:29,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572011557] [2022-12-13 11:55:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:29,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:29,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:29,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572011557] [2022-12-13 11:55:29,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572011557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:29,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:29,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:55:29,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058397879] [2022-12-13 11:55:29,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:29,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:55:29,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:29,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:55:29,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:55:29,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 191 [2022-12-13 11:55:29,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:29,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 191 [2022-12-13 11:55:29,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:29,542 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2022-12-13 11:55:29,542 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:55:29,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 449 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2022-12-13 11:55:29,544 INFO L137 encePairwiseOnDemand]: 188/191 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-12-13 11:55:29,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2022-12-13 11:55:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:55:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:55:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-12-13 11:55:29,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45200698080279234 [2022-12-13 11:55:29,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2022-12-13 11:55:29,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2022-12-13 11:55:29,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:29,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2022-12-13 11:55:29,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 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) [2022-12-13 11:55:29,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 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) [2022-12-13 11:55:29,551 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 259 transitions. [2022-12-13 11:55:29,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2022-12-13 11:55:29,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:55:29,551 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2022-12-13 11:55:29,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-12-13 11:55:29,552 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-12-13 11:55:29,552 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2022-12-13 11:55:29,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:29,552 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:55:29,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:55:29,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash 382377, now seen corresponding path program 1 times [2022-12-13 11:55:29,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:29,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85628325] [2022-12-13 11:55:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:29,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:29,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:29,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85628325] [2022-12-13 11:55:29,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85628325] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:29,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:29,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:55:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526251632] [2022-12-13 11:55:29,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:29,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:55:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:29,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:55:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:55:29,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 191 [2022-12-13 11:55:29,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:29,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 191 [2022-12-13 11:55:29,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:29,725 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2022-12-13 11:55:29,725 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:55:29,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 399 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2022-12-13 11:55:29,727 INFO L137 encePairwiseOnDemand]: 188/191 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-12-13 11:55:29,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2022-12-13 11:55:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:55:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:55:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2022-12-13 11:55:29,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4694589877835951 [2022-12-13 11:55:29,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2022-12-13 11:55:29,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2022-12-13 11:55:29,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:29,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2022-12-13 11:55:29,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 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) [2022-12-13 11:55:29,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 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) [2022-12-13 11:55:29,733 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 269 transitions. [2022-12-13 11:55:29,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2022-12-13 11:55:29,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:55:29,734 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2022-12-13 11:55:29,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2022-12-13 11:55:29,734 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 11:55:29,735 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2022-12-13 11:55:29,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:29,736 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:55:29,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:55:29,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:29,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash 367473736, now seen corresponding path program 1 times [2022-12-13 11:55:29,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:29,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991419608] [2022-12-13 11:55:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:29,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:29,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991419608] [2022-12-13 11:55:29,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991419608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:29,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:29,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:55:29,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199362926] [2022-12-13 11:55:29,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:29,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:55:29,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:29,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:55:29,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:55:29,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 191 [2022-12-13 11:55:29,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 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) [2022-12-13 11:55:29,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:29,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 191 [2022-12-13 11:55:29,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:29,899 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2022-12-13 11:55:29,900 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:55:29,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 280 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2022-12-13 11:55:29,901 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-12-13 11:55:29,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2022-12-13 11:55:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:55:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:55:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2022-12-13 11:55:29,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42408376963350786 [2022-12-13 11:55:29,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2022-12-13 11:55:29,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2022-12-13 11:55:29,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:29,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2022-12-13 11:55:29,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:29,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 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) [2022-12-13 11:55:29,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 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) [2022-12-13 11:55:29,908 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 243 transitions. [2022-12-13 11:55:29,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2022-12-13 11:55:29,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:55:29,910 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2022-12-13 11:55:29,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2022-12-13 11:55:29,910 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 11:55:29,911 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2022-12-13 11:55:29,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 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) [2022-12-13 11:55:29,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:29,911 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:55:29,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:55:29,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash 367473737, now seen corresponding path program 1 times [2022-12-13 11:55:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:29,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74130548] [2022-12-13 11:55:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:30,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:30,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74130548] [2022-12-13 11:55:30,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74130548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:30,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:30,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:55:30,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389953849] [2022-12-13 11:55:30,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:30,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:55:30,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:30,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:55:30,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:55:30,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 191 [2022-12-13 11:55:30,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:30,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 191 [2022-12-13 11:55:30,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:30,081 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2022-12-13 11:55:30,081 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:55:30,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 171 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2022-12-13 11:55:30,082 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-12-13 11:55:30,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2022-12-13 11:55:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:55:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:55:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2022-12-13 11:55:30,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4432809773123909 [2022-12-13 11:55:30,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2022-12-13 11:55:30,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2022-12-13 11:55:30,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:30,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2022-12-13 11:55:30,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 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) [2022-12-13 11:55:30,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 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) [2022-12-13 11:55:30,089 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 254 transitions. [2022-12-13 11:55:30,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2022-12-13 11:55:30,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:55:30,090 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2022-12-13 11:55:30,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2022-12-13 11:55:30,091 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 11:55:30,091 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2022-12-13 11:55:30,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:30,092 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:30,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:55:30,092 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:30,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1797719556, now seen corresponding path program 1 times [2022-12-13 11:55:30,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:30,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945681679] [2022-12-13 11:55:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:30,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:30,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:30,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945681679] [2022-12-13 11:55:30,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945681679] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:30,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:30,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:55:30,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352258595] [2022-12-13 11:55:30,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:30,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:55:30,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:30,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:55:30,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:55:30,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 191 [2022-12-13 11:55:30,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:30,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 191 [2022-12-13 11:55:30,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:30,272 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2022-12-13 11:55:30,272 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:55:30,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 94 events. 49/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 266 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 194. Up to 65 conditions per place. [2022-12-13 11:55:30,272 INFO L137 encePairwiseOnDemand]: 187/191 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2022-12-13 11:55:30,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2022-12-13 11:55:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:55:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:55:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2022-12-13 11:55:30,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4973821989528796 [2022-12-13 11:55:30,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2022-12-13 11:55:30,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2022-12-13 11:55:30,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:30,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2022-12-13 11:55:30,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 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) [2022-12-13 11:55:30,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 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) [2022-12-13 11:55:30,277 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 285 transitions. [2022-12-13 11:55:30,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2022-12-13 11:55:30,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:55:30,278 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2022-12-13 11:55:30,278 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2022-12-13 11:55:30,278 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2022-12-13 11:55:30,278 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2022-12-13 11:55:30,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:30,279 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:30,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 11:55:30,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash -272781601, now seen corresponding path program 1 times [2022-12-13 11:55:30,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:30,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609901021] [2022-12-13 11:55:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:30,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:30,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:30,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609901021] [2022-12-13 11:55:30,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609901021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:30,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:30,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:55:30,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406886441] [2022-12-13 11:55:30,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:30,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:55:30,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:55:30,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:55:30,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:30,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:30,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:30,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:30,490 INFO L130 PetriNetUnfolder]: 68/137 cut-off events. [2022-12-13 11:55:30,490 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 11:55:30,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 137 events. 68/137 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 425 event pairs, 24 based on Foata normal form. 2/139 useless extension candidates. Maximal degree in co-relation 320. Up to 74 conditions per place. [2022-12-13 11:55:30,491 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 19 selfloop transitions, 4 changer transitions 17/40 dead transitions. [2022-12-13 11:55:30,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 189 flow [2022-12-13 11:55:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:55:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:55:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 515 transitions. [2022-12-13 11:55:30,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4493891797556719 [2022-12-13 11:55:30,493 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 515 transitions. [2022-12-13 11:55:30,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 515 transitions. [2022-12-13 11:55:30,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:30,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 515 transitions. [2022-12-13 11:55:30,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.83333333333333) internal successors, (515), 6 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,498 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,498 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 6 states and 515 transitions. [2022-12-13 11:55:30,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 189 flow [2022-12-13 11:55:30,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:55:30,499 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 79 flow [2022-12-13 11:55:30,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=79, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2022-12-13 11:55:30,500 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2022-12-13 11:55:30,500 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 79 flow [2022-12-13 11:55:30,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:30,501 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:30,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 11:55:30,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:30,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1694370573, now seen corresponding path program 2 times [2022-12-13 11:55:30,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:30,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348198549] [2022-12-13 11:55:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:30,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:30,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:30,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348198549] [2022-12-13 11:55:30,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348198549] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:30,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54755844] [2022-12-13 11:55:30,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:55:30,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:30,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:30,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:30,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:55:30,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:55:30,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:30,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:55:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:30,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:30,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54755844] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:30,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:55:30,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-12-13 11:55:30,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674812898] [2022-12-13 11:55:30,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:30,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:55:30,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:30,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:55:30,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:55:30,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 191 [2022-12-13 11:55:30,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:30,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 191 [2022-12-13 11:55:30,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:30,849 INFO L130 PetriNetUnfolder]: 49/92 cut-off events. [2022-12-13 11:55:30,850 INFO L131 PetriNetUnfolder]: For 56/61 co-relation queries the response was YES. [2022-12-13 11:55:30,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 92 events. 49/92 cut-off events. For 56/61 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 3 based on Foata normal form. 11/102 useless extension candidates. Maximal degree in co-relation 294. Up to 62 conditions per place. [2022-12-13 11:55:30,851 INFO L137 encePairwiseOnDemand]: 187/191 looper letters, 24 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2022-12-13 11:55:30,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 173 flow [2022-12-13 11:55:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:55:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:55:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 355 transitions. [2022-12-13 11:55:30,852 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46465968586387435 [2022-12-13 11:55:30,853 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 355 transitions. [2022-12-13 11:55:30,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 355 transitions. [2022-12-13 11:55:30,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:30,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 355 transitions. [2022-12-13 11:55:30,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,857 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,857 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 79 flow. Second operand 4 states and 355 transitions. [2022-12-13 11:55:30,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 173 flow [2022-12-13 11:55:30,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 157 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 11:55:30,860 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 93 flow [2022-12-13 11:55:30,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2022-12-13 11:55:30,861 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2022-12-13 11:55:30,861 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 93 flow [2022-12-13 11:55:30,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:30,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:30,861 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:30,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:55:31,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:31,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:31,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1382518949, now seen corresponding path program 3 times [2022-12-13 11:55:31,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:31,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606605724] [2022-12-13 11:55:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:31,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:31,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:31,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606605724] [2022-12-13 11:55:31,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606605724] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:31,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:31,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:55:31,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154892148] [2022-12-13 11:55:31,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:31,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:55:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:55:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:55:31,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:31,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:31,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:31,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:31,245 INFO L130 PetriNetUnfolder]: 71/136 cut-off events. [2022-12-13 11:55:31,245 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2022-12-13 11:55:31,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 136 events. 71/136 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 346 event pairs, 25 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 451. Up to 75 conditions per place. [2022-12-13 11:55:31,247 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 25 selfloop transitions, 7 changer transitions 2/34 dead transitions. [2022-12-13 11:55:31,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 215 flow [2022-12-13 11:55:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:55:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:55:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 425 transitions. [2022-12-13 11:55:31,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44502617801047123 [2022-12-13 11:55:31,248 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 425 transitions. [2022-12-13 11:55:31,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 425 transitions. [2022-12-13 11:55:31,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:31,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 425 transitions. [2022-12-13 11:55:31,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,250 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,251 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 93 flow. Second operand 5 states and 425 transitions. [2022-12-13 11:55:31,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 215 flow [2022-12-13 11:55:31,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 210 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 11:55:31,252 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 137 flow [2022-12-13 11:55:31,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2022-12-13 11:55:31,252 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2022-12-13 11:55:31,253 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 137 flow [2022-12-13 11:55:31,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.8) internal successors, (409), 5 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:31,253 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:31,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 11:55:31,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:31,253 INFO L85 PathProgramCache]: Analyzing trace with hash -757350675, now seen corresponding path program 4 times [2022-12-13 11:55:31,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:31,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051560196] [2022-12-13 11:55:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:31,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:31,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051560196] [2022-12-13 11:55:31,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051560196] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:31,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:31,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:55:31,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776105159] [2022-12-13 11:55:31,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:31,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:55:31,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:31,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:55:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:55:31,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 191 [2022-12-13 11:55:31,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:31,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 191 [2022-12-13 11:55:31,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:31,426 INFO L130 PetriNetUnfolder]: 78/147 cut-off events. [2022-12-13 11:55:31,426 INFO L131 PetriNetUnfolder]: For 334/334 co-relation queries the response was YES. [2022-12-13 11:55:31,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 147 events. 78/147 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 396 event pairs, 36 based on Foata normal form. 6/153 useless extension candidates. Maximal degree in co-relation 575. Up to 122 conditions per place. [2022-12-13 11:55:31,428 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 26 selfloop transitions, 7 changer transitions 0/33 dead transitions. [2022-12-13 11:55:31,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 238 flow [2022-12-13 11:55:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:55:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:55:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 429 transitions. [2022-12-13 11:55:31,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4492146596858639 [2022-12-13 11:55:31,431 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 429 transitions. [2022-12-13 11:55:31,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 429 transitions. [2022-12-13 11:55:31,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:31,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 429 transitions. [2022-12-13 11:55:31,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,436 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 137 flow. Second operand 5 states and 429 transitions. [2022-12-13 11:55:31,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 238 flow [2022-12-13 11:55:31,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 230 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 11:55:31,440 INFO L231 Difference]: Finished difference. Result has 39 places, 24 transitions, 158 flow [2022-12-13 11:55:31,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=39, PETRI_TRANSITIONS=24} [2022-12-13 11:55:31,440 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2022-12-13 11:55:31,440 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 24 transitions, 158 flow [2022-12-13 11:55:31,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:31,441 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:31,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 11:55:31,441 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1434457443, now seen corresponding path program 5 times [2022-12-13 11:55:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:31,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657952391] [2022-12-13 11:55:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:31,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:31,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:31,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657952391] [2022-12-13 11:55:31,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657952391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:31,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:31,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:55:31,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114753847] [2022-12-13 11:55:31,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:31,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:55:31,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:31,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:55:31,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:55:31,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 191 [2022-12-13 11:55:31,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 24 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:31,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 191 [2022-12-13 11:55:31,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:31,629 INFO L130 PetriNetUnfolder]: 74/143 cut-off events. [2022-12-13 11:55:31,629 INFO L131 PetriNetUnfolder]: For 377/377 co-relation queries the response was YES. [2022-12-13 11:55:31,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597 conditions, 143 events. 74/143 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 389 event pairs, 21 based on Foata normal form. 4/147 useless extension candidates. Maximal degree in co-relation 585. Up to 81 conditions per place. [2022-12-13 11:55:31,631 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 29 selfloop transitions, 7 changer transitions 2/38 dead transitions. [2022-12-13 11:55:31,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 291 flow [2022-12-13 11:55:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:55:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:55:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 433 transitions. [2022-12-13 11:55:31,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45340314136125653 [2022-12-13 11:55:31,633 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 433 transitions. [2022-12-13 11:55:31,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 433 transitions. [2022-12-13 11:55:31,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:31,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 433 transitions. [2022-12-13 11:55:31,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,635 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,635 INFO L175 Difference]: Start difference. First operand has 39 places, 24 transitions, 158 flow. Second operand 5 states and 433 transitions. [2022-12-13 11:55:31,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 291 flow [2022-12-13 11:55:31,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 273 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 11:55:31,636 INFO L231 Difference]: Finished difference. Result has 43 places, 25 transitions, 182 flow [2022-12-13 11:55:31,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=43, PETRI_TRANSITIONS=25} [2022-12-13 11:55:31,637 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2022-12-13 11:55:31,637 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 25 transitions, 182 flow [2022-12-13 11:55:31,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:31,637 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:31,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 11:55:31,637 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:31,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1124446203, now seen corresponding path program 6 times [2022-12-13 11:55:31,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:31,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444686592] [2022-12-13 11:55:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:31,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:31,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:31,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444686592] [2022-12-13 11:55:31,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444686592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91181043] [2022-12-13 11:55:31,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:55:31,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:31,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:31,713 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:31,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:55:31,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 11:55:31,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:31,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:55:31,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:31,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:31,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91181043] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:31,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:31,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 11:55:31,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319769431] [2022-12-13 11:55:31,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:31,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:55:31,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:31,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:55:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:55:31,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:31,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 25 transitions, 182 flow. Second operand has 8 states, 8 states have (on average 81.625) internal successors, (653), 8 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:31,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:31,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:31,956 INFO L130 PetriNetUnfolder]: 75/140 cut-off events. [2022-12-13 11:55:31,956 INFO L131 PetriNetUnfolder]: For 585/585 co-relation queries the response was YES. [2022-12-13 11:55:31,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 140 events. 75/140 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 358 event pairs, 21 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 623. Up to 87 conditions per place. [2022-12-13 11:55:31,958 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 25 selfloop transitions, 11 changer transitions 1/37 dead transitions. [2022-12-13 11:55:31,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 37 transitions, 307 flow [2022-12-13 11:55:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:55:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:55:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 427 transitions. [2022-12-13 11:55:31,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44712041884816756 [2022-12-13 11:55:31,961 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 427 transitions. [2022-12-13 11:55:31,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 427 transitions. [2022-12-13 11:55:31,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:31,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 427 transitions. [2022-12-13 11:55:31,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.4) internal successors, (427), 5 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) [2022-12-13 11:55:31,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,967 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,967 INFO L175 Difference]: Start difference. First operand has 43 places, 25 transitions, 182 flow. Second operand 5 states and 427 transitions. [2022-12-13 11:55:31,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 37 transitions, 307 flow [2022-12-13 11:55:31,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 288 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-12-13 11:55:31,971 INFO L231 Difference]: Finished difference. Result has 45 places, 26 transitions, 199 flow [2022-12-13 11:55:31,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=45, PETRI_TRANSITIONS=26} [2022-12-13 11:55:31,972 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2022-12-13 11:55:31,972 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 26 transitions, 199 flow [2022-12-13 11:55:31,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 81.625) internal successors, (653), 8 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:31,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:31,972 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:31,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:55:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:32,173 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1514426469, now seen corresponding path program 1 times [2022-12-13 11:55:32,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:32,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007306960] [2022-12-13 11:55:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:32,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:32,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007306960] [2022-12-13 11:55:32,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007306960] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792073268] [2022-12-13 11:55:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:32,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:32,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:32,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:32,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:55:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:32,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:55:32,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:32,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:32,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792073268] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:32,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:32,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2022-12-13 11:55:32,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830309323] [2022-12-13 11:55:32,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:32,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:55:32,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:32,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:55:32,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:55:32,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 191 [2022-12-13 11:55:32,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 26 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:32,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:32,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 191 [2022-12-13 11:55:32,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:32,536 INFO L130 PetriNetUnfolder]: 122/230 cut-off events. [2022-12-13 11:55:32,536 INFO L131 PetriNetUnfolder]: For 872/885 co-relation queries the response was YES. [2022-12-13 11:55:32,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 230 events. 122/230 cut-off events. For 872/885 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 782 event pairs, 16 based on Foata normal form. 18/246 useless extension candidates. Maximal degree in co-relation 1014. Up to 113 conditions per place. [2022-12-13 11:55:32,537 INFO L137 encePairwiseOnDemand]: 187/191 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2022-12-13 11:55:32,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 415 flow [2022-12-13 11:55:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:55:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:55:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2022-12-13 11:55:32,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4908376963350785 [2022-12-13 11:55:32,538 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2022-12-13 11:55:32,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2022-12-13 11:55:32,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:32,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2022-12-13 11:55:32,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:32,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:32,540 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:32,540 INFO L175 Difference]: Start difference. First operand has 45 places, 26 transitions, 199 flow. Second operand 4 states and 375 transitions. [2022-12-13 11:55:32,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 415 flow [2022-12-13 11:55:32,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 379 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 11:55:32,542 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 282 flow [2022-12-13 11:55:32,542 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2022-12-13 11:55:32,543 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2022-12-13 11:55:32,543 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 282 flow [2022-12-13 11:55:32,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:32,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:32,543 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:32,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:55:32,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 11:55:32,744 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1468958730, now seen corresponding path program 2 times [2022-12-13 11:55:32,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:32,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755584028] [2022-12-13 11:55:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:32,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:32,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:32,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755584028] [2022-12-13 11:55:32,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755584028] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:32,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015344371] [2022-12-13 11:55:32,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:55:32,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:32,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:32,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:32,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:55:32,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:55:32,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:32,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:55:32,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:32,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:33,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015344371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:33,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:33,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-12-13 11:55:33,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925181247] [2022-12-13 11:55:33,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:33,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:55:33,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:55:33,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:55:33,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:33,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 282 flow. Second operand has 12 states, 12 states have (on average 81.33333333333333) internal successors, (976), 12 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:33,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:33,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:33,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:33,439 INFO L130 PetriNetUnfolder]: 256/480 cut-off events. [2022-12-13 11:55:33,440 INFO L131 PetriNetUnfolder]: For 1559/1559 co-relation queries the response was YES. [2022-12-13 11:55:33,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2224 conditions, 480 events. 256/480 cut-off events. For 1559/1559 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1989 event pairs, 37 based on Foata normal form. 12/492 useless extension candidates. Maximal degree in co-relation 2208. Up to 185 conditions per place. [2022-12-13 11:55:33,443 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 68 selfloop transitions, 20 changer transitions 4/92 dead transitions. [2022-12-13 11:55:33,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 92 transitions, 799 flow [2022-12-13 11:55:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:55:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:55:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 863 transitions. [2022-12-13 11:55:33,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4518324607329843 [2022-12-13 11:55:33,447 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 863 transitions. [2022-12-13 11:55:33,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 863 transitions. [2022-12-13 11:55:33,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:33,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 863 transitions. [2022-12-13 11:55:33,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 86.3) internal successors, (863), 10 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:33,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 191.0) internal successors, (2101), 11 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:33,453 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 191.0) internal successors, (2101), 11 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:33,453 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 282 flow. Second operand 10 states and 863 transitions. [2022-12-13 11:55:33,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 92 transitions, 799 flow [2022-12-13 11:55:33,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 92 transitions, 781 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-12-13 11:55:33,458 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 482 flow [2022-12-13 11:55:33,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=482, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2022-12-13 11:55:33,459 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2022-12-13 11:55:33,459 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 482 flow [2022-12-13 11:55:33,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.33333333333333) internal successors, (976), 12 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:33,460 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:33,460 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:33,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:55:33,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:33,661 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:33,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:33,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1081762462, now seen corresponding path program 3 times [2022-12-13 11:55:33,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:33,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832170386] [2022-12-13 11:55:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:33,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:33,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:33,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832170386] [2022-12-13 11:55:33,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832170386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:33,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314119441] [2022-12-13 11:55:33,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:55:33,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:33,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:33,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:33,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:55:33,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:55:33,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:33,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:55:33,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:33,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:33,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314119441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:33,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:33,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-13 11:55:33,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737351822] [2022-12-13 11:55:33,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:33,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:55:33,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:33,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:55:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:55:34,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:34,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 482 flow. Second operand has 14 states, 14 states have (on average 80.92857142857143) internal successors, (1133), 14 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:34,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:34,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:34,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:34,846 INFO L130 PetriNetUnfolder]: 376/762 cut-off events. [2022-12-13 11:55:34,846 INFO L131 PetriNetUnfolder]: For 4221/4221 co-relation queries the response was YES. [2022-12-13 11:55:34,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3921 conditions, 762 events. 376/762 cut-off events. For 4221/4221 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3989 event pairs, 8 based on Foata normal form. 16/778 useless extension candidates. Maximal degree in co-relation 3899. Up to 245 conditions per place. [2022-12-13 11:55:34,853 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 112 selfloop transitions, 70 changer transitions 33/215 dead transitions. [2022-12-13 11:55:34,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 215 transitions, 2115 flow [2022-12-13 11:55:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 11:55:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 11:55:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2549 transitions. [2022-12-13 11:55:34,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44485165794066317 [2022-12-13 11:55:34,860 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2549 transitions. [2022-12-13 11:55:34,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2549 transitions. [2022-12-13 11:55:34,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:34,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2549 transitions. [2022-12-13 11:55:34,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 84.96666666666667) internal successors, (2549), 30 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:34,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 191.0) internal successors, (5921), 31 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:34,878 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 191.0) internal successors, (5921), 31 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:34,878 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 482 flow. Second operand 30 states and 2549 transitions. [2022-12-13 11:55:34,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 215 transitions, 2115 flow [2022-12-13 11:55:34,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 215 transitions, 2008 flow, removed 50 selfloop flow, removed 2 redundant places. [2022-12-13 11:55:34,886 INFO L231 Difference]: Finished difference. Result has 96 places, 94 transitions, 1193 flow [2022-12-13 11:55:34,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1193, PETRI_PLACES=96, PETRI_TRANSITIONS=94} [2022-12-13 11:55:34,887 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2022-12-13 11:55:34,887 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 94 transitions, 1193 flow [2022-12-13 11:55:34,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.92857142857143) internal successors, (1133), 14 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:34,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:34,887 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:34,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:55:35,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 11:55:35,088 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:35,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1939447700, now seen corresponding path program 4 times [2022-12-13 11:55:35,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:35,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217445341] [2022-12-13 11:55:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:35,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:35,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:35,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217445341] [2022-12-13 11:55:35,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217445341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:35,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469630513] [2022-12-13 11:55:35,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:55:35,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:35,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:35,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:35,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:55:35,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:55:35,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:55:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:35,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:35,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469630513] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:35,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:35,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-13 11:55:35,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293379320] [2022-12-13 11:55:35,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:35,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:55:35,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:35,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:55:35,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:55:35,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:35,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 1193 flow. Second operand has 15 states, 15 states have (on average 80.86666666666666) internal successors, (1213), 15 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:35,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:35,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:35,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:36,095 INFO L130 PetriNetUnfolder]: 321/644 cut-off events. [2022-12-13 11:55:36,096 INFO L131 PetriNetUnfolder]: For 9646/9646 co-relation queries the response was YES. [2022-12-13 11:55:36,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4270 conditions, 644 events. 321/644 cut-off events. For 9646/9646 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3150 event pairs, 32 based on Foata normal form. 24/668 useless extension candidates. Maximal degree in co-relation 4237. Up to 185 conditions per place. [2022-12-13 11:55:36,105 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 96 selfloop transitions, 61 changer transitions 3/160 dead transitions. [2022-12-13 11:55:36,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 160 transitions, 1936 flow [2022-12-13 11:55:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 11:55:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 11:55:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1698 transitions. [2022-12-13 11:55:36,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4445026178010471 [2022-12-13 11:55:36,111 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1698 transitions. [2022-12-13 11:55:36,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1698 transitions. [2022-12-13 11:55:36,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:36,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1698 transitions. [2022-12-13 11:55:36,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 84.9) internal successors, (1698), 20 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:36,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 191.0) internal successors, (4011), 21 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:36,126 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 191.0) internal successors, (4011), 21 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:36,126 INFO L175 Difference]: Start difference. First operand has 96 places, 94 transitions, 1193 flow. Second operand 20 states and 1698 transitions. [2022-12-13 11:55:36,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 160 transitions, 1936 flow [2022-12-13 11:55:36,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 160 transitions, 1616 flow, removed 131 selfloop flow, removed 7 redundant places. [2022-12-13 11:55:36,157 INFO L231 Difference]: Finished difference. Result has 109 places, 93 transitions, 1106 flow [2022-12-13 11:55:36,157 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1106, PETRI_PLACES=109, PETRI_TRANSITIONS=93} [2022-12-13 11:55:36,158 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 80 predicate places. [2022-12-13 11:55:36,158 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 93 transitions, 1106 flow [2022-12-13 11:55:36,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.86666666666666) internal successors, (1213), 15 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:36,159 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:36,159 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:36,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:55:36,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:55:36,360 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:36,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -858357218, now seen corresponding path program 5 times [2022-12-13 11:55:36,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:36,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723437308] [2022-12-13 11:55:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:36,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:36,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:36,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723437308] [2022-12-13 11:55:36,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723437308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:36,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045221768] [2022-12-13 11:55:36,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:55:36,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:36,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:36,518 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:36,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:55:36,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:55:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:36,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:55:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:36,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:36,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045221768] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:36,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:36,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-13 11:55:36,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097300629] [2022-12-13 11:55:36,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:36,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:55:36,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:36,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:55:36,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:55:36,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:36,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 1106 flow. Second operand has 14 states, 14 states have (on average 81.21428571428571) internal successors, (1137), 14 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:36,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:36,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:36,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:37,379 INFO L130 PetriNetUnfolder]: 404/793 cut-off events. [2022-12-13 11:55:37,379 INFO L131 PetriNetUnfolder]: For 15546/15546 co-relation queries the response was YES. [2022-12-13 11:55:37,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5279 conditions, 793 events. 404/793 cut-off events. For 15546/15546 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4046 event pairs, 45 based on Foata normal form. 30/823 useless extension candidates. Maximal degree in co-relation 5243. Up to 352 conditions per place. [2022-12-13 11:55:37,385 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 122 selfloop transitions, 66 changer transitions 0/188 dead transitions. [2022-12-13 11:55:37,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 188 transitions, 2270 flow [2022-12-13 11:55:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 11:55:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 11:55:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1536 transitions. [2022-12-13 11:55:37,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4467713787085515 [2022-12-13 11:55:37,387 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1536 transitions. [2022-12-13 11:55:37,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1536 transitions. [2022-12-13 11:55:37,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:37,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1536 transitions. [2022-12-13 11:55:37,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.33333333333333) internal successors, (1536), 18 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:37,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 191.0) internal successors, (3629), 19 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:37,391 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 191.0) internal successors, (3629), 19 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:37,392 INFO L175 Difference]: Start difference. First operand has 109 places, 93 transitions, 1106 flow. Second operand 18 states and 1536 transitions. [2022-12-13 11:55:37,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 188 transitions, 2270 flow [2022-12-13 11:55:37,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 188 transitions, 2046 flow, removed 67 selfloop flow, removed 15 redundant places. [2022-12-13 11:55:37,415 INFO L231 Difference]: Finished difference. Result has 116 places, 123 transitions, 1557 flow [2022-12-13 11:55:37,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1557, PETRI_PLACES=116, PETRI_TRANSITIONS=123} [2022-12-13 11:55:37,416 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 87 predicate places. [2022-12-13 11:55:37,416 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 123 transitions, 1557 flow [2022-12-13 11:55:37,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.21428571428571) internal successors, (1137), 14 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:37,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:37,416 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:37,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:55:37,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 11:55:37,618 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:37,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:37,619 INFO L85 PathProgramCache]: Analyzing trace with hash 780783604, now seen corresponding path program 6 times [2022-12-13 11:55:37,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:37,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588726273] [2022-12-13 11:55:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:37,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:37,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:37,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588726273] [2022-12-13 11:55:37,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588726273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:37,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955916117] [2022-12-13 11:55:37,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:55:37,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:37,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:37,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:55:37,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 11:55:37,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:37,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:55:37,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:37,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:37,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955916117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:37,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:37,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-13 11:55:37,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549860074] [2022-12-13 11:55:37,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:37,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:55:37,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:55:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:55:37,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:37,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 123 transitions, 1557 flow. Second operand has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:37,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:37,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:37,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:38,692 INFO L130 PetriNetUnfolder]: 649/1264 cut-off events. [2022-12-13 11:55:38,692 INFO L131 PetriNetUnfolder]: For 39034/39034 co-relation queries the response was YES. [2022-12-13 11:55:38,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9288 conditions, 1264 events. 649/1264 cut-off events. For 39034/39034 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7397 event pairs, 138 based on Foata normal form. 88/1352 useless extension candidates. Maximal degree in co-relation 9249. Up to 686 conditions per place. [2022-12-13 11:55:38,701 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 176 selfloop transitions, 121 changer transitions 2/299 dead transitions. [2022-12-13 11:55:38,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 299 transitions, 3990 flow [2022-12-13 11:55:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:55:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 11:55:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2051 transitions. [2022-12-13 11:55:38,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44742582897033156 [2022-12-13 11:55:38,703 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2051 transitions. [2022-12-13 11:55:38,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2051 transitions. [2022-12-13 11:55:38,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:38,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2051 transitions. [2022-12-13 11:55:38,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.45833333333333) internal successors, (2051), 24 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:38,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 191.0) internal successors, (4775), 25 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:38,720 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 191.0) internal successors, (4775), 25 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:38,720 INFO L175 Difference]: Start difference. First operand has 116 places, 123 transitions, 1557 flow. Second operand 24 states and 2051 transitions. [2022-12-13 11:55:38,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 299 transitions, 3990 flow [2022-12-13 11:55:38,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 299 transitions, 3785 flow, removed 78 selfloop flow, removed 7 redundant places. [2022-12-13 11:55:38,763 INFO L231 Difference]: Finished difference. Result has 145 places, 195 transitions, 3048 flow [2022-12-13 11:55:38,763 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3048, PETRI_PLACES=145, PETRI_TRANSITIONS=195} [2022-12-13 11:55:38,763 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 116 predicate places. [2022-12-13 11:55:38,764 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 195 transitions, 3048 flow [2022-12-13 11:55:38,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:38,764 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:38,764 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:38,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:55:38,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 11:55:38,966 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:38,967 INFO L85 PathProgramCache]: Analyzing trace with hash -455656768, now seen corresponding path program 7 times [2022-12-13 11:55:38,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:38,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780167544] [2022-12-13 11:55:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:38,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:39,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:39,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780167544] [2022-12-13 11:55:39,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780167544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:39,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472934465] [2022-12-13 11:55:39,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:55:39,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:39,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:39,129 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:39,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:55:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:39,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:55:39,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:39,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:39,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472934465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:39,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:39,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-13 11:55:39,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101476827] [2022-12-13 11:55:39,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:39,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:55:39,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:39,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:55:39,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:55:39,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:39,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 195 transitions, 3048 flow. Second operand has 14 states, 14 states have (on average 80.85714285714286) internal successors, (1132), 14 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:39,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:39,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:39,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:40,151 INFO L130 PetriNetUnfolder]: 759/1518 cut-off events. [2022-12-13 11:55:40,151 INFO L131 PetriNetUnfolder]: For 68192/68192 co-relation queries the response was YES. [2022-12-13 11:55:40,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13742 conditions, 1518 events. 759/1518 cut-off events. For 68192/68192 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9421 event pairs, 69 based on Foata normal form. 16/1534 useless extension candidates. Maximal degree in co-relation 13690. Up to 501 conditions per place. [2022-12-13 11:55:40,163 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 140 selfloop transitions, 163 changer transitions 6/309 dead transitions. [2022-12-13 11:55:40,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 309 transitions, 5543 flow [2022-12-13 11:55:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 11:55:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 11:55:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1856 transitions. [2022-12-13 11:55:40,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44169443122322705 [2022-12-13 11:55:40,166 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1856 transitions. [2022-12-13 11:55:40,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1856 transitions. [2022-12-13 11:55:40,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:40,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1856 transitions. [2022-12-13 11:55:40,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 84.36363636363636) internal successors, (1856), 22 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:40,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 191.0) internal successors, (4393), 23 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:40,175 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 191.0) internal successors, (4393), 23 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:40,176 INFO L175 Difference]: Start difference. First operand has 145 places, 195 transitions, 3048 flow. Second operand 22 states and 1856 transitions. [2022-12-13 11:55:40,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 309 transitions, 5543 flow [2022-12-13 11:55:40,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 309 transitions, 4690 flow, removed 403 selfloop flow, removed 5 redundant places. [2022-12-13 11:55:40,338 INFO L231 Difference]: Finished difference. Result has 170 places, 240 transitions, 3852 flow [2022-12-13 11:55:40,338 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3852, PETRI_PLACES=170, PETRI_TRANSITIONS=240} [2022-12-13 11:55:40,339 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 141 predicate places. [2022-12-13 11:55:40,339 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 240 transitions, 3852 flow [2022-12-13 11:55:40,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.85714285714286) internal successors, (1132), 14 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:40,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:40,339 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:40,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:55:40,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:40,541 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:40,542 INFO L85 PathProgramCache]: Analyzing trace with hash 429734100, now seen corresponding path program 8 times [2022-12-13 11:55:40,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:40,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422112266] [2022-12-13 11:55:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:40,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:40,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:40,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422112266] [2022-12-13 11:55:40,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422112266] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:40,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312002605] [2022-12-13 11:55:40,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:55:40,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:40,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:40,698 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:40,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:55:40,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:55:40,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:55:40,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:40,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:40,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312002605] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:40,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:40,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-13 11:55:40,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548104112] [2022-12-13 11:55:40,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:40,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:55:40,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:55:40,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:55:40,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:40,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 240 transitions, 3852 flow. Second operand has 15 states, 15 states have (on average 80.93333333333334) internal successors, (1214), 15 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:40,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:40,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:40,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:41,606 INFO L130 PetriNetUnfolder]: 729/1444 cut-off events. [2022-12-13 11:55:41,606 INFO L131 PetriNetUnfolder]: For 83837/83837 co-relation queries the response was YES. [2022-12-13 11:55:41,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13240 conditions, 1444 events. 729/1444 cut-off events. For 83837/83837 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 8777 event pairs, 157 based on Foata normal form. 24/1468 useless extension candidates. Maximal degree in co-relation 13179. Up to 681 conditions per place. [2022-12-13 11:55:41,636 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 125 selfloop transitions, 143 changer transitions 3/271 dead transitions. [2022-12-13 11:55:41,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 271 transitions, 4522 flow [2022-12-13 11:55:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:55:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:55:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1104 transitions. [2022-12-13 11:55:41,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44462343938783727 [2022-12-13 11:55:41,639 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1104 transitions. [2022-12-13 11:55:41,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1104 transitions. [2022-12-13 11:55:41,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:41,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1104 transitions. [2022-12-13 11:55:41,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 84.92307692307692) internal successors, (1104), 13 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:41,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 191.0) internal successors, (2674), 14 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:41,646 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 191.0) internal successors, (2674), 14 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:41,646 INFO L175 Difference]: Start difference. First operand has 170 places, 240 transitions, 3852 flow. Second operand 13 states and 1104 transitions. [2022-12-13 11:55:41,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 271 transitions, 4522 flow [2022-12-13 11:55:41,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 271 transitions, 4274 flow, removed 119 selfloop flow, removed 4 redundant places. [2022-12-13 11:55:41,826 INFO L231 Difference]: Finished difference. Result has 179 places, 235 transitions, 3942 flow [2022-12-13 11:55:41,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=3423, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3942, PETRI_PLACES=179, PETRI_TRANSITIONS=235} [2022-12-13 11:55:41,826 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 150 predicate places. [2022-12-13 11:55:41,826 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 235 transitions, 3942 flow [2022-12-13 11:55:41,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.93333333333334) internal successors, (1214), 15 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:41,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:41,827 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:41,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:55:42,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:42,028 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1345958022, now seen corresponding path program 9 times [2022-12-13 11:55:42,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:42,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348080855] [2022-12-13 11:55:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:42,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:42,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:42,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348080855] [2022-12-13 11:55:42,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348080855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:42,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019439727] [2022-12-13 11:55:42,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:55:42,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:42,135 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:42,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:55:42,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:55:42,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:42,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:55:42,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:42,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:42,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019439727] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:42,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:42,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-13 11:55:42,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037377741] [2022-12-13 11:55:42,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:42,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:55:42,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:42,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:55:42,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:55:42,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 191 [2022-12-13 11:55:42,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 235 transitions, 3942 flow. Second operand has 11 states, 11 states have (on average 85.81818181818181) internal successors, (944), 11 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:42,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:42,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 191 [2022-12-13 11:55:42,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:42,831 INFO L130 PetriNetUnfolder]: 879/1788 cut-off events. [2022-12-13 11:55:42,831 INFO L131 PetriNetUnfolder]: For 112022/112034 co-relation queries the response was YES. [2022-12-13 11:55:42,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17533 conditions, 1788 events. 879/1788 cut-off events. For 112022/112034 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 11820 event pairs, 134 based on Foata normal form. 83/1870 useless extension candidates. Maximal degree in co-relation 17470. Up to 900 conditions per place. [2022-12-13 11:55:42,843 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 189 selfloop transitions, 89 changer transitions 53/337 dead transitions. [2022-12-13 11:55:42,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 337 transitions, 6283 flow [2022-12-13 11:55:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:55:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:55:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 543 transitions. [2022-12-13 11:55:42,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4738219895287958 [2022-12-13 11:55:42,844 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 543 transitions. [2022-12-13 11:55:42,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 543 transitions. [2022-12-13 11:55:42,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:42,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 543 transitions. [2022-12-13 11:55:42,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.5) internal successors, (543), 6 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:42,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:42,846 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 191.0) internal successors, (1337), 7 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:42,846 INFO L175 Difference]: Start difference. First operand has 179 places, 235 transitions, 3942 flow. Second operand 6 states and 543 transitions. [2022-12-13 11:55:42,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 337 transitions, 6283 flow [2022-12-13 11:55:43,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 337 transitions, 5991 flow, removed 45 selfloop flow, removed 12 redundant places. [2022-12-13 11:55:43,054 INFO L231 Difference]: Finished difference. Result has 174 places, 245 transitions, 4535 flow [2022-12-13 11:55:43,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4535, PETRI_PLACES=174, PETRI_TRANSITIONS=245} [2022-12-13 11:55:43,055 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2022-12-13 11:55:43,055 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 245 transitions, 4535 flow [2022-12-13 11:55:43,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 85.81818181818181) internal successors, (944), 11 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:43,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:43,055 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:43,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 11:55:43,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:43,256 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:43,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2119522429, now seen corresponding path program 10 times [2022-12-13 11:55:43,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:43,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709974839] [2022-12-13 11:55:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:43,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:43,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709974839] [2022-12-13 11:55:43,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709974839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236954257] [2022-12-13 11:55:43,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:55:43,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:43,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:43,421 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:43,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:55:43,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:55:43,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:43,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:55:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:43,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:43,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236954257] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:43,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:43,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 11:55:43,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110345023] [2022-12-13 11:55:43,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:43,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:55:43,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:55:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:55:43,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:43,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 245 transitions, 4535 flow. Second operand has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:43,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:43,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:43,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:45,085 INFO L130 PetriNetUnfolder]: 1659/3370 cut-off events. [2022-12-13 11:55:45,085 INFO L131 PetriNetUnfolder]: For 210194/210194 co-relation queries the response was YES. [2022-12-13 11:55:45,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33325 conditions, 3370 events. 1659/3370 cut-off events. For 210194/210194 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24724 event pairs, 205 based on Foata normal form. 68/3438 useless extension candidates. Maximal degree in co-relation 33263. Up to 1276 conditions per place. [2022-12-13 11:55:45,116 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 444 selfloop transitions, 143 changer transitions 2/589 dead transitions. [2022-12-13 11:55:45,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 589 transitions, 11519 flow [2022-12-13 11:55:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 11:55:45,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 11:55:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1461 transitions. [2022-12-13 11:55:45,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44995380351093317 [2022-12-13 11:55:45,118 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1461 transitions. [2022-12-13 11:55:45,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1461 transitions. [2022-12-13 11:55:45,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:45,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1461 transitions. [2022-12-13 11:55:45,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 85.94117647058823) internal successors, (1461), 17 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:45,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 191.0) internal successors, (3438), 18 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:45,123 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 191.0) internal successors, (3438), 18 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:45,123 INFO L175 Difference]: Start difference. First operand has 174 places, 245 transitions, 4535 flow. Second operand 17 states and 1461 transitions. [2022-12-13 11:55:45,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 589 transitions, 11519 flow [2022-12-13 11:55:45,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 589 transitions, 11191 flow, removed 140 selfloop flow, removed 9 redundant places. [2022-12-13 11:55:45,496 INFO L231 Difference]: Finished difference. Result has 181 places, 356 transitions, 7261 flow [2022-12-13 11:55:45,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=4375, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7261, PETRI_PLACES=181, PETRI_TRANSITIONS=356} [2022-12-13 11:55:45,497 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2022-12-13 11:55:45,497 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 356 transitions, 7261 flow [2022-12-13 11:55:45,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:45,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:45,497 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:45,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 11:55:45,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 11:55:45,698 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:45,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:45,699 INFO L85 PathProgramCache]: Analyzing trace with hash 319065349, now seen corresponding path program 11 times [2022-12-13 11:55:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:45,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281889254] [2022-12-13 11:55:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:45,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:45,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:45,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281889254] [2022-12-13 11:55:45,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281889254] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:45,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043623496] [2022-12-13 11:55:45,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:55:45,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:45,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:45,915 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:45,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:55:45,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 11:55:45,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 11:55:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:46,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:46,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043623496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:46,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:46,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-12-13 11:55:46,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621817821] [2022-12-13 11:55:46,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 11:55:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 11:55:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-12-13 11:55:46,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:46,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 356 transitions, 7261 flow. Second operand has 21 states, 21 states have (on average 80.61904761904762) internal successors, (1693), 21 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:46,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:46,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:46,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:49,034 INFO L130 PetriNetUnfolder]: 2236/4538 cut-off events. [2022-12-13 11:55:49,034 INFO L131 PetriNetUnfolder]: For 299133/299133 co-relation queries the response was YES. [2022-12-13 11:55:49,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49241 conditions, 4538 events. 2236/4538 cut-off events. For 299133/299133 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 35664 event pairs, 226 based on Foata normal form. 58/4596 useless extension candidates. Maximal degree in co-relation 49175. Up to 1766 conditions per place. [2022-12-13 11:55:49,068 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 281 selfloop transitions, 303 changer transitions 2/586 dead transitions. [2022-12-13 11:55:49,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 586 transitions, 13365 flow [2022-12-13 11:55:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 11:55:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 11:55:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2182 transitions. [2022-12-13 11:55:49,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43938783729359643 [2022-12-13 11:55:49,070 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2182 transitions. [2022-12-13 11:55:49,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2182 transitions. [2022-12-13 11:55:49,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:49,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2182 transitions. [2022-12-13 11:55:49,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 83.92307692307692) internal successors, (2182), 26 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:49,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 191.0) internal successors, (5157), 27 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:49,076 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 191.0) internal successors, (5157), 27 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:49,076 INFO L175 Difference]: Start difference. First operand has 181 places, 356 transitions, 7261 flow. Second operand 26 states and 2182 transitions. [2022-12-13 11:55:49,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 586 transitions, 13365 flow [2022-12-13 11:55:49,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 586 transitions, 12390 flow, removed 454 selfloop flow, removed 5 redundant places. [2022-12-13 11:55:49,795 INFO L231 Difference]: Finished difference. Result has 212 places, 495 transitions, 11234 flow [2022-12-13 11:55:49,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=6702, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11234, PETRI_PLACES=212, PETRI_TRANSITIONS=495} [2022-12-13 11:55:49,796 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 183 predicate places. [2022-12-13 11:55:49,796 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 495 transitions, 11234 flow [2022-12-13 11:55:49,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.61904761904762) internal successors, (1693), 21 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:49,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:49,797 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:49,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 11:55:49,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 11:55:49,998 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:49,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1621054331, now seen corresponding path program 12 times [2022-12-13 11:55:49,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:50,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098491113] [2022-12-13 11:55:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:50,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:50,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:50,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098491113] [2022-12-13 11:55:50,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098491113] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:50,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281110610] [2022-12-13 11:55:50,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:55:50,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:50,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:50,162 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:50,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 11:55:50,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 11:55:50,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:50,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:55:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:50,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:50,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281110610] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:50,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:50,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 11:55:50,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54317425] [2022-12-13 11:55:50,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:50,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:55:50,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:55:50,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:55:50,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:50,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 495 transitions, 11234 flow. Second operand has 17 states, 17 states have (on average 80.82352941176471) internal successors, (1374), 17 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:50,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:50,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:50,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:53,950 INFO L130 PetriNetUnfolder]: 2242/4504 cut-off events. [2022-12-13 11:55:53,950 INFO L131 PetriNetUnfolder]: For 325137/325137 co-relation queries the response was YES. [2022-12-13 11:55:53,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49379 conditions, 4504 events. 2242/4504 cut-off events. For 325137/325137 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34963 event pairs, 193 based on Foata normal form. 132/4636 useless extension candidates. Maximal degree in co-relation 49303. Up to 1519 conditions per place. [2022-12-13 11:55:54,010 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 544 selfloop transitions, 311 changer transitions 31/886 dead transitions. [2022-12-13 11:55:54,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 886 transitions, 20544 flow [2022-12-13 11:55:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 11:55:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 11:55:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2978 transitions. [2022-12-13 11:55:54,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4454749439042633 [2022-12-13 11:55:54,014 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2978 transitions. [2022-12-13 11:55:54,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2978 transitions. [2022-12-13 11:55:54,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:54,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2978 transitions. [2022-12-13 11:55:54,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 85.08571428571429) internal successors, (2978), 35 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:54,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 191.0) internal successors, (6876), 36 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:54,024 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 191.0) internal successors, (6876), 36 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:54,025 INFO L175 Difference]: Start difference. First operand has 212 places, 495 transitions, 11234 flow. Second operand 35 states and 2978 transitions. [2022-12-13 11:55:54,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 886 transitions, 20544 flow [2022-12-13 11:55:55,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 886 transitions, 17584 flow, removed 1403 selfloop flow, removed 10 redundant places. [2022-12-13 11:55:55,313 INFO L231 Difference]: Finished difference. Result has 243 places, 550 transitions, 11963 flow [2022-12-13 11:55:55,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=9457, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11963, PETRI_PLACES=243, PETRI_TRANSITIONS=550} [2022-12-13 11:55:55,314 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 214 predicate places. [2022-12-13 11:55:55,314 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 550 transitions, 11963 flow [2022-12-13 11:55:55,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 80.82352941176471) internal successors, (1374), 17 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:55,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:55,314 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:55,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 11:55:55,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 11:55:55,515 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:55:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:55,517 INFO L85 PathProgramCache]: Analyzing trace with hash -537465007, now seen corresponding path program 13 times [2022-12-13 11:55:55,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:55,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416692135] [2022-12-13 11:55:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:55,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:55,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:55,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416692135] [2022-12-13 11:55:55,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416692135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:55,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915730765] [2022-12-13 11:55:55,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:55:55,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:55,680 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:55,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 11:55:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:55:55,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:55,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:55,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915730765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:55,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:55,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 11:55:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192374564] [2022-12-13 11:55:55,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:55,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:55:55,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:55,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:55:55,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:55:56,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:55:56,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 550 transitions, 11963 flow. Second operand has 16 states, 16 states have (on average 80.875) internal successors, (1294), 16 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:56,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:56,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:55:56,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:58,791 INFO L130 PetriNetUnfolder]: 2266/4528 cut-off events. [2022-12-13 11:55:58,791 INFO L131 PetriNetUnfolder]: For 182318/182318 co-relation queries the response was YES. [2022-12-13 11:55:58,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44563 conditions, 4528 events. 2266/4528 cut-off events. For 182318/182318 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34925 event pairs, 241 based on Foata normal form. 40/4568 useless extension candidates. Maximal degree in co-relation 44483. Up to 1890 conditions per place. [2022-12-13 11:55:58,861 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 663 selfloop transitions, 228 changer transitions 16/907 dead transitions. [2022-12-13 11:55:58,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 907 transitions, 19031 flow [2022-12-13 11:55:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 11:55:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 11:55:58,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2981 transitions. [2022-12-13 11:55:58,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44592370979805535 [2022-12-13 11:55:58,866 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2981 transitions. [2022-12-13 11:55:58,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2981 transitions. [2022-12-13 11:55:58,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:58,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2981 transitions. [2022-12-13 11:55:58,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 85.17142857142858) internal successors, (2981), 35 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:58,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 191.0) internal successors, (6876), 36 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:58,876 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 191.0) internal successors, (6876), 36 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:58,876 INFO L175 Difference]: Start difference. First operand has 243 places, 550 transitions, 11963 flow. Second operand 35 states and 2981 transitions. [2022-12-13 11:55:58,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 907 transitions, 19031 flow [2022-12-13 11:55:59,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 907 transitions, 18263 flow, removed 281 selfloop flow, removed 18 redundant places. [2022-12-13 11:55:59,803 INFO L231 Difference]: Finished difference. Result has 265 places, 587 transitions, 12547 flow [2022-12-13 11:55:59,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=11230, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12547, PETRI_PLACES=265, PETRI_TRANSITIONS=587} [2022-12-13 11:55:59,804 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 236 predicate places. [2022-12-13 11:55:59,804 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 587 transitions, 12547 flow [2022-12-13 11:55:59,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.875) internal successors, (1294), 16 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:59,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:59,804 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:59,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 11:56:00,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 11:56:00,006 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1291052589, now seen corresponding path program 14 times [2022-12-13 11:56:00,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:00,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785279147] [2022-12-13 11:56:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:00,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:00,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785279147] [2022-12-13 11:56:00,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785279147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:00,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664178631] [2022-12-13 11:56:00,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:56:00,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:00,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:00,148 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:00,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 11:56:00,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:56:00,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:00,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:56:00,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:00,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:00,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664178631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:00,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:56:00,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 11:56:00,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443491131] [2022-12-13 11:56:00,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:00,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:56:00,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:00,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:56:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:56:00,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:56:00,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 587 transitions, 12547 flow. Second operand has 16 states, 16 states have (on average 80.6875) internal successors, (1291), 16 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:00,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:00,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:56:00,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:03,233 INFO L130 PetriNetUnfolder]: 2696/5332 cut-off events. [2022-12-13 11:56:03,233 INFO L131 PetriNetUnfolder]: For 245366/245366 co-relation queries the response was YES. [2022-12-13 11:56:03,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53884 conditions, 5332 events. 2696/5332 cut-off events. For 245366/245366 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 42254 event pairs, 715 based on Foata normal form. 62/5394 useless extension candidates. Maximal degree in co-relation 53803. Up to 3391 conditions per place. [2022-12-13 11:56:03,298 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 649 selfloop transitions, 278 changer transitions 18/945 dead transitions. [2022-12-13 11:56:03,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 945 transitions, 20822 flow [2022-12-13 11:56:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 11:56:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 11:56:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3315 transitions. [2022-12-13 11:56:03,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44502617801047123 [2022-12-13 11:56:03,302 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3315 transitions. [2022-12-13 11:56:03,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3315 transitions. [2022-12-13 11:56:03,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:03,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3315 transitions. [2022-12-13 11:56:03,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 85.0) internal successors, (3315), 39 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:03,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 191.0) internal successors, (7640), 40 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:03,309 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 191.0) internal successors, (7640), 40 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:03,309 INFO L175 Difference]: Start difference. First operand has 265 places, 587 transitions, 12547 flow. Second operand 39 states and 3315 transitions. [2022-12-13 11:56:03,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 945 transitions, 20822 flow [2022-12-13 11:56:04,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 945 transitions, 20268 flow, removed 170 selfloop flow, removed 13 redundant places. [2022-12-13 11:56:04,462 INFO L231 Difference]: Finished difference. Result has 303 places, 707 transitions, 16516 flow [2022-12-13 11:56:04,462 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=12105, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=16516, PETRI_PLACES=303, PETRI_TRANSITIONS=707} [2022-12-13 11:56:04,462 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 274 predicate places. [2022-12-13 11:56:04,462 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 707 transitions, 16516 flow [2022-12-13 11:56:04,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.6875) internal successors, (1291), 16 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:04,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:04,463 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:04,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 11:56:04,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 11:56:04,664 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:04,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2118205175, now seen corresponding path program 15 times [2022-12-13 11:56:04,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:04,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717588049] [2022-12-13 11:56:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:04,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:04,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:04,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717588049] [2022-12-13 11:56:04,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717588049] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:04,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390040539] [2022-12-13 11:56:04,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:56:04,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:04,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:04,867 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:04,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 11:56:04,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 11:56:04,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:56:04,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:05,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:05,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390040539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:05,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:56:05,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-12-13 11:56:05,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642387212] [2022-12-13 11:56:05,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:05,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 11:56:05,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:05,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 11:56:05,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-12-13 11:56:05,281 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:56:05,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 707 transitions, 16516 flow. Second operand has 22 states, 22 states have (on average 80.54545454545455) internal successors, (1772), 22 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:05,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:05,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:56:05,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:10,273 INFO L130 PetriNetUnfolder]: 3416/6837 cut-off events. [2022-12-13 11:56:10,273 INFO L131 PetriNetUnfolder]: For 408735/408735 co-relation queries the response was YES. [2022-12-13 11:56:10,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76658 conditions, 6837 events. 3416/6837 cut-off events. For 408735/408735 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 57217 event pairs, 130 based on Foata normal form. 48/6885 useless extension candidates. Maximal degree in co-relation 76565. Up to 2189 conditions per place. [2022-12-13 11:56:10,332 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 372 selfloop transitions, 801 changer transitions 29/1202 dead transitions. [2022-12-13 11:56:10,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1202 transitions, 29399 flow [2022-12-13 11:56:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 11:56:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-12-13 11:56:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 4981 transitions. [2022-12-13 11:56:10,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4420090513798917 [2022-12-13 11:56:10,339 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 4981 transitions. [2022-12-13 11:56:10,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 4981 transitions. [2022-12-13 11:56:10,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:10,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 4981 transitions. [2022-12-13 11:56:10,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 84.42372881355932) internal successors, (4981), 59 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:10,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 191.0) internal successors, (11460), 60 states have internal predecessors, (11460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:10,357 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 191.0) internal successors, (11460), 60 states have internal predecessors, (11460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:10,357 INFO L175 Difference]: Start difference. First operand has 303 places, 707 transitions, 16516 flow. Second operand 59 states and 4981 transitions. [2022-12-13 11:56:10,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1202 transitions, 29399 flow [2022-12-13 11:56:12,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1202 transitions, 28241 flow, removed 529 selfloop flow, removed 10 redundant places. [2022-12-13 11:56:12,625 INFO L231 Difference]: Finished difference. Result has 366 places, 967 transitions, 25146 flow [2022-12-13 11:56:12,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=15642, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=25146, PETRI_PLACES=366, PETRI_TRANSITIONS=967} [2022-12-13 11:56:12,625 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 337 predicate places. [2022-12-13 11:56:12,625 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 967 transitions, 25146 flow [2022-12-13 11:56:12,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 80.54545454545455) internal successors, (1772), 22 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:12,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:12,626 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:12,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 11:56:12,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:12,827 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:12,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1981417581, now seen corresponding path program 16 times [2022-12-13 11:56:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:12,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71581552] [2022-12-13 11:56:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:12,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:12,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71581552] [2022-12-13 11:56:12,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71581552] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414662945] [2022-12-13 11:56:12,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:56:12,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:12,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:12,954 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:12,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 11:56:13,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:56:13,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:56:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:13,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:13,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414662945] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:13,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:56:13,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-13 11:56:13,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935078027] [2022-12-13 11:56:13,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:13,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:56:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:13,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:56:13,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:56:13,288 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:56:13,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 967 transitions, 25146 flow. Second operand has 18 states, 18 states have (on average 80.61111111111111) internal successors, (1451), 18 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:13,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:13,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:56:13,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:19,106 INFO L130 PetriNetUnfolder]: 3697/7334 cut-off events. [2022-12-13 11:56:19,106 INFO L131 PetriNetUnfolder]: For 507713/507713 co-relation queries the response was YES. [2022-12-13 11:56:19,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87207 conditions, 7334 events. 3697/7334 cut-off events. For 507713/507713 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 61876 event pairs, 971 based on Foata normal form. 90/7424 useless extension candidates. Maximal degree in co-relation 87099. Up to 4752 conditions per place. [2022-12-13 11:56:19,176 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 830 selfloop transitions, 421 changer transitions 29/1280 dead transitions. [2022-12-13 11:56:19,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1280 transitions, 34308 flow [2022-12-13 11:56:19,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 11:56:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 11:56:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3467 transitions. [2022-12-13 11:56:19,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44272762099348745 [2022-12-13 11:56:19,179 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3467 transitions. [2022-12-13 11:56:19,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3467 transitions. [2022-12-13 11:56:19,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:19,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3467 transitions. [2022-12-13 11:56:19,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 84.5609756097561) internal successors, (3467), 41 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:19,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 191.0) internal successors, (8022), 42 states have internal predecessors, (8022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:19,187 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 191.0) internal successors, (8022), 42 states have internal predecessors, (8022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:19,187 INFO L175 Difference]: Start difference. First operand has 366 places, 967 transitions, 25146 flow. Second operand 41 states and 3467 transitions. [2022-12-13 11:56:19,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1280 transitions, 34308 flow [2022-12-13 11:56:23,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1280 transitions, 31337 flow, removed 1403 selfloop flow, removed 16 redundant places. [2022-12-13 11:56:23,096 INFO L231 Difference]: Finished difference. Result has 401 places, 1078 transitions, 27275 flow [2022-12-13 11:56:23,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=22705, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=27275, PETRI_PLACES=401, PETRI_TRANSITIONS=1078} [2022-12-13 11:56:23,096 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 372 predicate places. [2022-12-13 11:56:23,096 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1078 transitions, 27275 flow [2022-12-13 11:56:23,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 80.61111111111111) internal successors, (1451), 18 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:23,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:23,097 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:23,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 11:56:23,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 11:56:23,298 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:23,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1348454653, now seen corresponding path program 17 times [2022-12-13 11:56:23,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:23,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972042490] [2022-12-13 11:56:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:23,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:23,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:23,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972042490] [2022-12-13 11:56:23,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972042490] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:23,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466750393] [2022-12-13 11:56:23,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:56:23,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:23,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:23,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:23,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 11:56:23,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 11:56:23,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:23,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:56:23,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:23,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:23,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466750393] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:23,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:56:23,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-12-13 11:56:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779286207] [2022-12-13 11:56:23,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:23,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 11:56:23,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:23,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 11:56:23,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-12-13 11:56:23,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:56:23,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1078 transitions, 27275 flow. Second operand has 22 states, 22 states have (on average 80.63636363636364) internal successors, (1774), 22 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:23,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:23,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:56:23,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:29,626 INFO L130 PetriNetUnfolder]: 3780/7533 cut-off events. [2022-12-13 11:56:29,626 INFO L131 PetriNetUnfolder]: For 622739/622739 co-relation queries the response was YES. [2022-12-13 11:56:29,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91287 conditions, 7533 events. 3780/7533 cut-off events. For 622739/622739 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 64055 event pairs, 232 based on Foata normal form. 94/7627 useless extension candidates. Maximal degree in co-relation 91167. Up to 2367 conditions per place. [2022-12-13 11:56:29,703 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 486 selfloop transitions, 760 changer transitions 4/1250 dead transitions. [2022-12-13 11:56:29,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1250 transitions, 32544 flow [2022-12-13 11:56:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 11:56:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 11:56:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3318 transitions. [2022-12-13 11:56:29,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44542891663310513 [2022-12-13 11:56:29,706 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3318 transitions. [2022-12-13 11:56:29,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3318 transitions. [2022-12-13 11:56:29,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:29,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3318 transitions. [2022-12-13 11:56:29,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 85.07692307692308) internal successors, (3318), 39 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:29,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 191.0) internal successors, (7640), 40 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:29,712 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 191.0) internal successors, (7640), 40 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:29,712 INFO L175 Difference]: Start difference. First operand has 401 places, 1078 transitions, 27275 flow. Second operand 39 states and 3318 transitions. [2022-12-13 11:56:29,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1250 transitions, 32544 flow [2022-12-13 11:56:34,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 1250 transitions, 31637 flow, removed 368 selfloop flow, removed 19 redundant places. [2022-12-13 11:56:34,390 INFO L231 Difference]: Finished difference. Result has 428 places, 1089 transitions, 29244 flow [2022-12-13 11:56:34,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=26175, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=736, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=29244, PETRI_PLACES=428, PETRI_TRANSITIONS=1089} [2022-12-13 11:56:34,391 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 399 predicate places. [2022-12-13 11:56:34,391 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 1089 transitions, 29244 flow [2022-12-13 11:56:34,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 80.63636363636364) internal successors, (1774), 22 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:34,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:34,392 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:34,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 11:56:34,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 11:56:34,593 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash 194949585, now seen corresponding path program 18 times [2022-12-13 11:56:34,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:34,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768241419] [2022-12-13 11:56:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:34,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:34,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768241419] [2022-12-13 11:56:34,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768241419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:34,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136666647] [2022-12-13 11:56:34,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:56:34,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:34,711 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:34,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 11:56:34,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 11:56:34,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:34,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:56:34,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:34,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:34,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136666647] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:34,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:56:34,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 11:56:34,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151043395] [2022-12-13 11:56:34,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:34,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:56:34,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:34,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:56:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:56:35,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:56:35,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1089 transitions, 29244 flow. Second operand has 16 states, 16 states have (on average 80.875) internal successors, (1294), 16 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:35,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:35,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:56:35,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:40,007 INFO L130 PetriNetUnfolder]: 4092/8089 cut-off events. [2022-12-13 11:56:40,007 INFO L131 PetriNetUnfolder]: For 806029/806029 co-relation queries the response was YES. [2022-12-13 11:56:40,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103270 conditions, 8089 events. 4092/8089 cut-off events. For 806029/806029 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 69301 event pairs, 1442 based on Foata normal form. 138/8227 useless extension candidates. Maximal degree in co-relation 103143. Up to 6814 conditions per place. [2022-12-13 11:56:40,131 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 1106 selfloop transitions, 256 changer transitions 5/1367 dead transitions. [2022-12-13 11:56:40,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1367 transitions, 38014 flow [2022-12-13 11:56:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 11:56:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 11:56:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3061 transitions. [2022-12-13 11:56:40,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4451716114019779 [2022-12-13 11:56:40,134 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3061 transitions. [2022-12-13 11:56:40,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3061 transitions. [2022-12-13 11:56:40,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:40,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3061 transitions. [2022-12-13 11:56:40,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 85.02777777777777) internal successors, (3061), 36 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:40,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 191.0) internal successors, (7067), 37 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:40,140 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 191.0) internal successors, (7067), 37 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:40,140 INFO L175 Difference]: Start difference. First operand has 428 places, 1089 transitions, 29244 flow. Second operand 36 states and 3061 transitions. [2022-12-13 11:56:40,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1367 transitions, 38014 flow [2022-12-13 11:56:46,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1367 transitions, 36826 flow, removed 336 selfloop flow, removed 31 redundant places. [2022-12-13 11:56:46,724 INFO L231 Difference]: Finished difference. Result has 449 places, 1189 transitions, 32584 flow [2022-12-13 11:56:46,724 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=28360, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=32584, PETRI_PLACES=449, PETRI_TRANSITIONS=1189} [2022-12-13 11:56:46,725 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 420 predicate places. [2022-12-13 11:56:46,725 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1189 transitions, 32584 flow [2022-12-13 11:56:46,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.875) internal successors, (1294), 16 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:46,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:46,725 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:46,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 11:56:46,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:46,927 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:56:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:46,928 INFO L85 PathProgramCache]: Analyzing trace with hash -288214171, now seen corresponding path program 19 times [2022-12-13 11:56:46,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:46,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700165417] [2022-12-13 11:56:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:46,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:47,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700165417] [2022-12-13 11:56:47,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700165417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330725760] [2022-12-13 11:56:47,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:56:47,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:47,052 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:47,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 11:56:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:47,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:56:47,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:47,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:47,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330725760] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:47,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:56:47,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 11:56:47,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581956450] [2022-12-13 11:56:47,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:47,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:56:47,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:47,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:56:47,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:56:47,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:56:47,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1189 transitions, 32584 flow. Second operand has 17 states, 17 states have (on average 80.88235294117646) internal successors, (1375), 17 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:47,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:47,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:56:47,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:54,227 INFO L130 PetriNetUnfolder]: 4300/8496 cut-off events. [2022-12-13 11:56:54,227 INFO L131 PetriNetUnfolder]: For 918613/918613 co-relation queries the response was YES. [2022-12-13 11:56:54,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111484 conditions, 8496 events. 4300/8496 cut-off events. For 918613/918613 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 73025 event pairs, 1420 based on Foata normal form. 50/8546 useless extension candidates. Maximal degree in co-relation 111345. Up to 6773 conditions per place. [2022-12-13 11:56:54,321 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 1058 selfloop transitions, 300 changer transitions 23/1381 dead transitions. [2022-12-13 11:56:54,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1381 transitions, 39131 flow [2022-12-13 11:56:54,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 11:56:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 11:56:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2296 transitions. [2022-12-13 11:56:54,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4452200891991468 [2022-12-13 11:56:54,324 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2296 transitions. [2022-12-13 11:56:54,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2296 transitions. [2022-12-13 11:56:54,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:54,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2296 transitions. [2022-12-13 11:56:54,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 85.03703703703704) internal successors, (2296), 27 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:54,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 191.0) internal successors, (5348), 28 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:54,329 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 191.0) internal successors, (5348), 28 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:54,329 INFO L175 Difference]: Start difference. First operand has 449 places, 1189 transitions, 32584 flow. Second operand 27 states and 2296 transitions. [2022-12-13 11:56:54,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1381 transitions, 39131 flow [2022-12-13 11:57:02,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1381 transitions, 37656 flow, removed 689 selfloop flow, removed 10 redundant places. [2022-12-13 11:57:02,317 INFO L231 Difference]: Finished difference. Result has 474 places, 1241 transitions, 33958 flow [2022-12-13 11:57:02,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=31158, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=906, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=33958, PETRI_PLACES=474, PETRI_TRANSITIONS=1241} [2022-12-13 11:57:02,318 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 445 predicate places. [2022-12-13 11:57:02,318 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 1241 transitions, 33958 flow [2022-12-13 11:57:02,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 80.88235294117646) internal successors, (1375), 17 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:02,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:02,319 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:02,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 11:57:02,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 11:57:02,520 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:57:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:02,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1299922383, now seen corresponding path program 20 times [2022-12-13 11:57:02,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:02,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788329293] [2022-12-13 11:57:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:02,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:02,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788329293] [2022-12-13 11:57:02,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788329293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751096290] [2022-12-13 11:57:02,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:57:02,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:02,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:02,642 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:02,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 11:57:02,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:57:02,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:57:02,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:02,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:02,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751096290] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:02,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:02,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 11:57:02,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875208304] [2022-12-13 11:57:02,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:02,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:57:02,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:02,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:57:02,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:57:02,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:57:02,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 1241 transitions, 33958 flow. Second operand has 16 states, 16 states have (on average 80.6875) internal successors, (1291), 16 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:02,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:02,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:57:02,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:08,601 INFO L130 PetriNetUnfolder]: 4471/8821 cut-off events. [2022-12-13 11:57:08,601 INFO L131 PetriNetUnfolder]: For 1116134/1116134 co-relation queries the response was YES. [2022-12-13 11:57:08,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116438 conditions, 8821 events. 4471/8821 cut-off events. For 1116134/1116134 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 76121 event pairs, 1703 based on Foata normal form. 140/8961 useless extension candidates. Maximal degree in co-relation 116289. Up to 7994 conditions per place. [2022-12-13 11:57:08,728 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 1277 selfloop transitions, 176 changer transitions 4/1457 dead transitions. [2022-12-13 11:57:08,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1457 transitions, 40805 flow [2022-12-13 11:57:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 11:57:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 11:57:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3052 transitions. [2022-12-13 11:57:08,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44386271087841767 [2022-12-13 11:57:08,733 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3052 transitions. [2022-12-13 11:57:08,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3052 transitions. [2022-12-13 11:57:08,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:08,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3052 transitions. [2022-12-13 11:57:08,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 84.77777777777777) internal successors, (3052), 36 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:08,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 191.0) internal successors, (7067), 37 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:08,741 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 191.0) internal successors, (7067), 37 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:08,741 INFO L175 Difference]: Start difference. First operand has 474 places, 1241 transitions, 33958 flow. Second operand 36 states and 3052 transitions. [2022-12-13 11:57:08,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1457 transitions, 40805 flow [2022-12-13 11:57:17,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 1457 transitions, 40321 flow, removed 188 selfloop flow, removed 15 redundant places. [2022-12-13 11:57:17,433 INFO L231 Difference]: Finished difference. Result has 509 places, 1321 transitions, 36406 flow [2022-12-13 11:57:17,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=33478, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=36406, PETRI_PLACES=509, PETRI_TRANSITIONS=1321} [2022-12-13 11:57:17,434 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 480 predicate places. [2022-12-13 11:57:17,434 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1321 transitions, 36406 flow [2022-12-13 11:57:17,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.6875) internal successors, (1291), 16 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:17,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:17,434 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:17,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 11:57:17,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 11:57:17,636 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:57:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:17,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2127074969, now seen corresponding path program 21 times [2022-12-13 11:57:17,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:17,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198485435] [2022-12-13 11:57:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:17,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:17,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198485435] [2022-12-13 11:57:17,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198485435] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803381002] [2022-12-13 11:57:17,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:57:17,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:17,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:17,814 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:17,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 11:57:17,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 11:57:17,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:17,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:57:17,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:17,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:18,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803381002] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:18,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:18,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-12-13 11:57:18,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115793508] [2022-12-13 11:57:18,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:18,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 11:57:18,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 11:57:18,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-12-13 11:57:18,143 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:57:18,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1321 transitions, 36406 flow. Second operand has 21 states, 21 states have (on average 80.57142857142857) internal successors, (1692), 21 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:18,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:18,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:57:18,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:27,549 INFO L130 PetriNetUnfolder]: 4952/9842 cut-off events. [2022-12-13 11:57:27,549 INFO L131 PetriNetUnfolder]: For 1411588/1411588 co-relation queries the response was YES. [2022-12-13 11:57:27,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137869 conditions, 9842 events. 4952/9842 cut-off events. For 1411588/1411588 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 87084 event pairs, 423 based on Foata normal form. 32/9874 useless extension candidates. Maximal degree in co-relation 137707. Up to 3055 conditions per place. [2022-12-13 11:57:27,715 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 544 selfloop transitions, 1114 changer transitions 22/1680 dead transitions. [2022-12-13 11:57:27,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1680 transitions, 48175 flow [2022-12-13 11:57:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 11:57:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-13 11:57:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4463 transitions. [2022-12-13 11:57:27,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44087721031314825 [2022-12-13 11:57:27,719 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4463 transitions. [2022-12-13 11:57:27,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4463 transitions. [2022-12-13 11:57:27,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:27,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4463 transitions. [2022-12-13 11:57:27,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 84.20754716981132) internal successors, (4463), 53 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:27,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 191.0) internal successors, (10314), 54 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:27,728 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 191.0) internal successors, (10314), 54 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:27,728 INFO L175 Difference]: Start difference. First operand has 509 places, 1321 transitions, 36406 flow. Second operand 53 states and 4463 transitions. [2022-12-13 11:57:27,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1680 transitions, 48175 flow [2022-12-13 11:57:40,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 1680 transitions, 46431 flow, removed 822 selfloop flow, removed 10 redundant places. [2022-12-13 11:57:40,814 INFO L231 Difference]: Finished difference. Result has 569 places, 1505 transitions, 44053 flow [2022-12-13 11:57:40,815 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=34928, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=946, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=44053, PETRI_PLACES=569, PETRI_TRANSITIONS=1505} [2022-12-13 11:57:40,816 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 540 predicate places. [2022-12-13 11:57:40,816 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 1505 transitions, 44053 flow [2022-12-13 11:57:40,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.57142857142857) internal successors, (1692), 21 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:40,816 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:40,816 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:40,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 11:57:41,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 11:57:41,017 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:57:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1310207089, now seen corresponding path program 22 times [2022-12-13 11:57:41,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:41,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656984675] [2022-12-13 11:57:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:41,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:41,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:41,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656984675] [2022-12-13 11:57:41,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656984675] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:41,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166489577] [2022-12-13 11:57:41,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:57:41,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:41,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:41,191 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:41,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 11:57:41,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:57:41,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:57:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:41,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:41,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166489577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:41,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:41,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-12-13 11:57:41,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269482343] [2022-12-13 11:57:41,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:41,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 11:57:41,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 11:57:41,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-12-13 11:57:41,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:57:41,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 1505 transitions, 44053 flow. Second operand has 22 states, 22 states have (on average 80.5) internal successors, (1771), 22 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:41,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:41,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:57:41,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:50,156 INFO L130 PetriNetUnfolder]: 4970/9849 cut-off events. [2022-12-13 11:57:50,156 INFO L131 PetriNetUnfolder]: For 1551726/1551726 co-relation queries the response was YES. [2022-12-13 11:57:50,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144086 conditions, 9849 events. 4970/9849 cut-off events. For 1551726/1551726 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 86847 event pairs, 972 based on Foata normal form. 66/9915 useless extension candidates. Maximal degree in co-relation 143907. Up to 4111 conditions per place. [2022-12-13 11:57:50,299 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 777 selfloop transitions, 878 changer transitions 3/1658 dead transitions. [2022-12-13 11:57:50,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 1658 transitions, 50247 flow [2022-12-13 11:57:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 11:57:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 11:57:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2905 transitions. [2022-12-13 11:57:50,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4473360024638128 [2022-12-13 11:57:50,302 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2905 transitions. [2022-12-13 11:57:50,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2905 transitions. [2022-12-13 11:57:50,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:50,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2905 transitions. [2022-12-13 11:57:50,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 85.44117647058823) internal successors, (2905), 34 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:50,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 191.0) internal successors, (6685), 35 states have internal predecessors, (6685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:50,307 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 191.0) internal successors, (6685), 35 states have internal predecessors, (6685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:50,307 INFO L175 Difference]: Start difference. First operand has 569 places, 1505 transitions, 44053 flow. Second operand 34 states and 2905 transitions. [2022-12-13 11:57:50,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 1658 transitions, 50247 flow [2022-12-13 11:58:06,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 1658 transitions, 48214 flow, removed 922 selfloop flow, removed 16 redundant places. [2022-12-13 11:58:07,033 INFO L231 Difference]: Finished difference. Result has 594 places, 1515 transitions, 44881 flow [2022-12-13 11:58:07,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=42059, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=857, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=44881, PETRI_PLACES=594, PETRI_TRANSITIONS=1515} [2022-12-13 11:58:07,034 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 565 predicate places. [2022-12-13 11:58:07,034 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 1515 transitions, 44881 flow [2022-12-13 11:58:07,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 80.5) internal successors, (1771), 22 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:07,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:07,034 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:07,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 11:58:07,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:07,235 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:58:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:07,236 INFO L85 PathProgramCache]: Analyzing trace with hash 186955289, now seen corresponding path program 23 times [2022-12-13 11:58:07,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:58:07,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870193608] [2022-12-13 11:58:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:07,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:58:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:07,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:58:07,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870193608] [2022-12-13 11:58:07,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870193608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:58:07,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359949709] [2022-12-13 11:58:07,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:58:07,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:07,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:58:07,353 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:58:07,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 11:58:07,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 11:58:07,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:58:07,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:58:07,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:07,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:07,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359949709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:07,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:58:07,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 11:58:07,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799903558] [2022-12-13 11:58:07,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:07,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:58:07,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:58:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:58:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:58:07,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:58:07,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 1515 transitions, 44881 flow. Second operand has 17 states, 17 states have (on average 80.82352941176471) internal successors, (1374), 17 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:07,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:58:07,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:58:07,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:16,043 INFO L130 PetriNetUnfolder]: 5268/10427 cut-off events. [2022-12-13 11:58:16,043 INFO L131 PetriNetUnfolder]: For 1863130/1863130 co-relation queries the response was YES. [2022-12-13 11:58:16,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154858 conditions, 10427 events. 5268/10427 cut-off events. For 1863130/1863130 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 92503 event pairs, 1691 based on Foata normal form. 70/10497 useless extension candidates. Maximal degree in co-relation 154673. Up to 8003 conditions per place. [2022-12-13 11:58:16,220 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 1236 selfloop transitions, 475 changer transitions 17/1728 dead transitions. [2022-12-13 11:58:16,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 1728 transitions, 52876 flow [2022-12-13 11:58:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 11:58:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 11:58:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2462 transitions. [2022-12-13 11:58:16,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44448456400072217 [2022-12-13 11:58:16,223 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2462 transitions. [2022-12-13 11:58:16,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2462 transitions. [2022-12-13 11:58:16,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:16,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2462 transitions. [2022-12-13 11:58:16,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 84.89655172413794) internal successors, (2462), 29 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:16,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 191.0) internal successors, (5730), 30 states have internal predecessors, (5730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:16,228 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 191.0) internal successors, (5730), 30 states have internal predecessors, (5730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:16,228 INFO L175 Difference]: Start difference. First operand has 594 places, 1515 transitions, 44881 flow. Second operand 29 states and 2462 transitions. [2022-12-13 11:58:16,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 1728 transitions, 52876 flow [2022-12-13 11:58:33,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1728 transitions, 51874 flow, removed 138 selfloop flow, removed 24 redundant places. [2022-12-13 11:58:33,203 INFO L231 Difference]: Finished difference. Result has 606 places, 1595 transitions, 48184 flow [2022-12-13 11:58:33,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=43912, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1065, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=48184, PETRI_PLACES=606, PETRI_TRANSITIONS=1595} [2022-12-13 11:58:33,204 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 577 predicate places. [2022-12-13 11:58:33,204 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 1595 transitions, 48184 flow [2022-12-13 11:58:33,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 80.82352941176471) internal successors, (1374), 17 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:33,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:33,204 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:33,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 11:58:33,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 11:58:33,404 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:58:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:33,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1453751529, now seen corresponding path program 24 times [2022-12-13 11:58:33,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:58:33,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708068407] [2022-12-13 11:58:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:33,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:58:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:33,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:58:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708068407] [2022-12-13 11:58:33,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708068407] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:58:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354003036] [2022-12-13 11:58:33,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:58:33,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:33,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:58:33,507 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:58:33,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 11:58:33,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 11:58:33,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:58:33,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 11:58:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:33,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:33,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354003036] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:33,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:58:33,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 11:58:33,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643306630] [2022-12-13 11:58:33,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:33,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:58:33,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:58:33,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:58:33,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:58:33,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 191 [2022-12-13 11:58:33,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 1595 transitions, 48184 flow. Second operand has 12 states, 12 states have (on average 85.33333333333333) internal successors, (1024), 12 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:33,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:58:33,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 191 [2022-12-13 11:58:33,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:42,828 INFO L130 PetriNetUnfolder]: 6674/13326 cut-off events. [2022-12-13 11:58:42,828 INFO L131 PetriNetUnfolder]: For 2422729/2422744 co-relation queries the response was YES. [2022-12-13 11:58:42,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205052 conditions, 13326 events. 6674/13326 cut-off events. For 2422729/2422744 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 123386 event pairs, 710 based on Foata normal form. 271/13596 useless extension candidates. Maximal degree in co-relation 204864. Up to 6588 conditions per place. [2022-12-13 11:58:43,067 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 1273 selfloop transitions, 754 changer transitions 146/2182 dead transitions. [2022-12-13 11:58:43,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 2182 transitions, 70096 flow [2022-12-13 11:58:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:58:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:58:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 636 transitions. [2022-12-13 11:58:43,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47569184741959614 [2022-12-13 11:58:43,069 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 636 transitions. [2022-12-13 11:58:43,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 636 transitions. [2022-12-13 11:58:43,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:43,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 636 transitions. [2022-12-13 11:58:43,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:43,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 191.0) internal successors, (1528), 8 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:43,071 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 191.0) internal successors, (1528), 8 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:43,071 INFO L175 Difference]: Start difference. First operand has 606 places, 1595 transitions, 48184 flow. Second operand 7 states and 636 transitions. [2022-12-13 11:58:43,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 2182 transitions, 70096 flow [2022-12-13 11:59:07,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 2182 transitions, 69631 flow, removed 162 selfloop flow, removed 18 redundant places. [2022-12-13 11:59:07,891 INFO L231 Difference]: Finished difference. Result has 594 places, 1845 transitions, 60602 flow [2022-12-13 11:59:07,892 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=47638, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=850, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=60602, PETRI_PLACES=594, PETRI_TRANSITIONS=1845} [2022-12-13 11:59:07,893 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 565 predicate places. [2022-12-13 11:59:07,893 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 1845 transitions, 60602 flow [2022-12-13 11:59:07,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 85.33333333333333) internal successors, (1024), 12 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:07,893 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:59:07,893 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:59:07,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 11:59:08,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:08,094 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 11:59:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:08,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1114156756, now seen corresponding path program 25 times [2022-12-13 11:59:08,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:08,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848451389] [2022-12-13 11:59:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:08,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:08,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:08,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848451389] [2022-12-13 11:59:08,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848451389] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:08,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657005110] [2022-12-13 11:59:08,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:59:08,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:08,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:08,219 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:08,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 11:59:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:08,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:59:08,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:08,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:08,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657005110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:08,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:08,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-12-13 11:59:08,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840950071] [2022-12-13 11:59:08,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:08,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 11:59:08,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:08,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 11:59:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:59:08,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 11:59:08,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 1845 transitions, 60602 flow. Second operand has 19 states, 19 states have (on average 80.63157894736842) internal successors, (1532), 19 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:08,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:59:08,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 11:59:08,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:59:25,955 INFO L130 PetriNetUnfolder]: 10739/21516 cut-off events. [2022-12-13 11:59:25,955 INFO L131 PetriNetUnfolder]: For 3741672/3741672 co-relation queries the response was YES. [2022-12-13 11:59:26,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335000 conditions, 21516 events. 10739/21516 cut-off events. For 3741672/3741672 co-relation queries the response was YES. Maximal size of possible extension queue 1720. Compared 213909 event pairs, 1415 based on Foata normal form. 200/21716 useless extension candidates. Maximal degree in co-relation 334809. Up to 7870 conditions per place. [2022-12-13 11:59:26,382 INFO L137 encePairwiseOnDemand]: 186/191 looper letters, 2880 selfloop transitions, 694 changer transitions 39/3613 dead transitions. [2022-12-13 11:59:26,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 3613 transitions, 120425 flow [2022-12-13 11:59:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 11:59:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 11:59:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2237 transitions. [2022-12-13 11:59:26,385 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.450463149416029 [2022-12-13 11:59:26,385 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2237 transitions. [2022-12-13 11:59:26,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2237 transitions. [2022-12-13 11:59:26,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:59:26,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2237 transitions. [2022-12-13 11:59:26,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.03846153846153) internal successors, (2237), 26 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:26,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 191.0) internal successors, (5157), 27 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:26,389 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 191.0) internal successors, (5157), 27 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:26,389 INFO L175 Difference]: Start difference. First operand has 594 places, 1845 transitions, 60602 flow. Second operand 26 states and 2237 transitions. [2022-12-13 11:59:26,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 3613 transitions, 120425 flow [2022-12-13 12:00:13,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 3613 transitions, 118964 flow, removed 698 selfloop flow, removed 10 redundant places. [2022-12-13 12:00:13,428 INFO L231 Difference]: Finished difference. Result has 602 places, 2258 transitions, 74591 flow [2022-12-13 12:00:13,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=59761, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=74591, PETRI_PLACES=602, PETRI_TRANSITIONS=2258} [2022-12-13 12:00:13,429 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 573 predicate places. [2022-12-13 12:00:13,429 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 2258 transitions, 74591 flow [2022-12-13 12:00:13,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.63157894736842) internal successors, (1532), 19 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:13,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:00:13,430 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:00:13,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 12:00:13,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 12:00:13,631 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 12:00:13,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:00:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1053797054, now seen corresponding path program 26 times [2022-12-13 12:00:13,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:00:13,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582314166] [2022-12-13 12:00:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:00:13,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:00:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:13,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:00:13,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582314166] [2022-12-13 12:00:13,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582314166] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:00:13,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928770793] [2022-12-13 12:00:13,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:00:13,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:13,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:00:13,775 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:00:13,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 12:00:13,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:00:13,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:00:13,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:00:13,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:00:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:13,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:00:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:14,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928770793] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:00:14,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:00:14,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-12-13 12:00:14,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287962081] [2022-12-13 12:00:14,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:00:14,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 12:00:14,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:00:14,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 12:00:14,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-12-13 12:00:14,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 12:00:14,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 2258 transitions, 74591 flow. Second operand has 23 states, 23 states have (on average 80.47826086956522) internal successors, (1851), 23 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:14,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:00:14,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 12:00:14,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:00:19,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:01:26,919 INFO L130 PetriNetUnfolder]: 12255/24937 cut-off events. [2022-12-13 12:01:26,919 INFO L131 PetriNetUnfolder]: For 4728497/4728497 co-relation queries the response was YES. [2022-12-13 12:01:27,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404910 conditions, 24937 events. 12255/24937 cut-off events. For 4728497/4728497 co-relation queries the response was YES. Maximal size of possible extension queue 1903. Compared 256029 event pairs, 390 based on Foata normal form. 118/25055 useless extension candidates. Maximal degree in co-relation 404716. Up to 7843 conditions per place. [2022-12-13 12:01:27,436 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 867 selfloop transitions, 3513 changer transitions 112/4492 dead transitions. [2022-12-13 12:01:27,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 4492 transitions, 151729 flow [2022-12-13 12:01:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-12-13 12:01:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2022-12-13 12:01:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 9494 transitions. [2022-12-13 12:01:27,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.443810770381451 [2022-12-13 12:01:27,443 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 9494 transitions. [2022-12-13 12:01:27,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 9494 transitions. [2022-12-13 12:01:27,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:01:27,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 9494 transitions. [2022-12-13 12:01:27,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 84.76785714285714) internal successors, (9494), 112 states have internal predecessors, (9494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:01:27,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 191.0) internal successors, (21583), 113 states have internal predecessors, (21583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:01:27,470 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 191.0) internal successors, (21583), 113 states have internal predecessors, (21583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:01:27,470 INFO L175 Difference]: Start difference. First operand has 602 places, 2258 transitions, 74591 flow. Second operand 112 states and 9494 transitions. [2022-12-13 12:01:27,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 4492 transitions, 151729 flow [2022-12-13 12:02:34,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 701 places, 4492 transitions, 149165 flow, removed 1164 selfloop flow, removed 12 redundant places. [2022-12-13 12:02:34,617 INFO L231 Difference]: Finished difference. Result has 719 places, 3814 transitions, 134335 flow [2022-12-13 12:02:34,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=72875, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=134335, PETRI_PLACES=719, PETRI_TRANSITIONS=3814} [2022-12-13 12:02:34,618 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 690 predicate places. [2022-12-13 12:02:34,618 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 3814 transitions, 134335 flow [2022-12-13 12:02:34,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 80.47826086956522) internal successors, (1851), 23 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:34,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:02:34,619 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:02:34,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 12:02:34,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 12:02:34,820 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 12:02:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash 226644468, now seen corresponding path program 27 times [2022-12-13 12:02:34,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:34,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947450141] [2022-12-13 12:02:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:34,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:34,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:34,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947450141] [2022-12-13 12:02:34,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947450141] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:34,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496164288] [2022-12-13 12:02:34,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:02:34,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:34,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:34,981 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:34,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 12:02:35,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 12:02:35,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:02:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:02:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:35,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:35,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496164288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:35,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:35,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-12-13 12:02:35,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904598132] [2022-12-13 12:02:35,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:35,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 12:02:35,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:35,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 12:02:35,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:02:35,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 12:02:35,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 3814 transitions, 134335 flow. Second operand has 21 states, 21 states have (on average 80.52380952380952) internal successors, (1691), 21 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:35,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:02:35,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 12:02:35,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:02:51,174 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 [] [2022-12-13 12:03:33,492 INFO L130 PetriNetUnfolder]: 12670/25326 cut-off events. [2022-12-13 12:03:33,492 INFO L131 PetriNetUnfolder]: For 5082300/5082300 co-relation queries the response was YES. [2022-12-13 12:03:33,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420945 conditions, 25326 events. 12670/25326 cut-off events. For 5082300/5082300 co-relation queries the response was YES. Maximal size of possible extension queue 1948. Compared 256622 event pairs, 1583 based on Foata normal form. 324/25650 useless extension candidates. Maximal degree in co-relation 420737. Up to 8705 conditions per place. [2022-12-13 12:03:34,072 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 3224 selfloop transitions, 1289 changer transitions 53/4566 dead transitions. [2022-12-13 12:03:34,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 4566 transitions, 162465 flow [2022-12-13 12:03:34,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-13 12:03:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-12-13 12:03:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5614 transitions. [2022-12-13 12:03:34,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44534348722830397 [2022-12-13 12:03:34,079 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5614 transitions. [2022-12-13 12:03:34,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5614 transitions. [2022-12-13 12:03:34,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:03:34,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5614 transitions. [2022-12-13 12:03:34,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 85.06060606060606) internal successors, (5614), 66 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:34,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 191.0) internal successors, (12797), 67 states have internal predecessors, (12797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:34,092 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 191.0) internal successors, (12797), 67 states have internal predecessors, (12797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:34,092 INFO L175 Difference]: Start difference. First operand has 719 places, 3814 transitions, 134335 flow. Second operand 66 states and 5614 transitions. [2022-12-13 12:03:34,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 4566 transitions, 162465 flow [2022-12-13 12:05:07,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 752 places, 4566 transitions, 148118 flow, removed 6680 selfloop flow, removed 29 redundant places. [2022-12-13 12:05:07,766 INFO L231 Difference]: Finished difference. Result has 765 places, 4018 transitions, 132560 flow [2022-12-13 12:05:07,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=122177, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1069, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=132560, PETRI_PLACES=765, PETRI_TRANSITIONS=4018} [2022-12-13 12:05:07,768 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 736 predicate places. [2022-12-13 12:05:07,768 INFO L495 AbstractCegarLoop]: Abstraction has has 765 places, 4018 transitions, 132560 flow [2022-12-13 12:05:07,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.52380952380952) internal successors, (1691), 21 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:07,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:05:07,768 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:05:07,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 12:05:07,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 12:05:07,969 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 12:05:07,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:07,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2036342556, now seen corresponding path program 28 times [2022-12-13 12:05:07,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:05:07,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410425255] [2022-12-13 12:05:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:07,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:05:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:08,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:05:08,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410425255] [2022-12-13 12:05:08,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410425255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:05:08,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473074869] [2022-12-13 12:05:08,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:05:08,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:05:08,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:05:08,148 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:05:08,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 12:05:08,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:05:08,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:05:08,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:05:08,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:05:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:08,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:05:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:08,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473074869] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:05:08,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:05:08,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-12-13 12:05:08,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897767871] [2022-12-13 12:05:08,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:05:08,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 12:05:08,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:05:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 12:05:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:05:08,551 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 12:05:08,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 4018 transitions, 132560 flow. Second operand has 20 states, 20 states have (on average 80.7) internal successors, (1614), 20 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:08,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:05:08,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 12:05:08,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:05:48,552 INFO L130 PetriNetUnfolder]: 13170/26182 cut-off events. [2022-12-13 12:05:48,552 INFO L131 PetriNetUnfolder]: For 5653828/5653828 co-relation queries the response was YES. [2022-12-13 12:05:49,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423396 conditions, 26182 events. 13170/26182 cut-off events. For 5653828/5653828 co-relation queries the response was YES. Maximal size of possible extension queue 2035. Compared 264543 event pairs, 1797 based on Foata normal form. 218/26396 useless extension candidates. Maximal degree in co-relation 423183. Up to 10683 conditions per place. [2022-12-13 12:05:49,158 INFO L137 encePairwiseOnDemand]: 185/191 looper letters, 3684 selfloop transitions, 987 changer transitions 0/4671 dead transitions. [2022-12-13 12:05:49,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 4671 transitions, 157326 flow [2022-12-13 12:05:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-13 12:05:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-12-13 12:05:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4940 transitions. [2022-12-13 12:05:49,162 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4459288680267196 [2022-12-13 12:05:49,162 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4940 transitions. [2022-12-13 12:05:49,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4940 transitions. [2022-12-13 12:05:49,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:05:49,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4940 transitions. [2022-12-13 12:05:49,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 85.17241379310344) internal successors, (4940), 58 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:49,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 191.0) internal successors, (11269), 59 states have internal predecessors, (11269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:49,172 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 191.0) internal successors, (11269), 59 states have internal predecessors, (11269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:49,172 INFO L175 Difference]: Start difference. First operand has 765 places, 4018 transitions, 132560 flow. Second operand 58 states and 4940 transitions. [2022-12-13 12:05:49,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 4671 transitions, 157326 flow [2022-12-13 12:07:34,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 4671 transitions, 153492 flow, removed 1561 selfloop flow, removed 16 redundant places. [2022-12-13 12:07:34,699 INFO L231 Difference]: Finished difference. Result has 814 places, 4194 transitions, 138181 flow [2022-12-13 12:07:34,701 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=129212, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=845, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3097, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=138181, PETRI_PLACES=814, PETRI_TRANSITIONS=4194} [2022-12-13 12:07:34,702 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 785 predicate places. [2022-12-13 12:07:34,702 INFO L495 AbstractCegarLoop]: Abstraction has has 814 places, 4194 transitions, 138181 flow [2022-12-13 12:07:34,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 80.7) internal successors, (1614), 20 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:34,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:07:34,702 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:07:34,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-13 12:07:34,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 12:07:34,903 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 12:07:34,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:07:34,904 INFO L85 PathProgramCache]: Analyzing trace with hash -691305722, now seen corresponding path program 29 times [2022-12-13 12:07:34,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:07:34,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714969416] [2022-12-13 12:07:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:07:34,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:07:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:07:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:07:35,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:07:35,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714969416] [2022-12-13 12:07:35,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714969416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:07:35,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025254495] [2022-12-13 12:07:35,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:07:35,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:07:35,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:07:35,036 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:07:35,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_809e5313-10f8-4320-b359-3f9086119c9e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 12:07:35,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 12:07:35,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:07:35,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:07:35,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:07:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:07:35,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:07:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:07:35,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025254495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:07:35,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:07:35,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-12-13 12:07:35,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86898013] [2022-12-13 12:07:35,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:07:35,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 12:07:35,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:07:35,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 12:07:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-12-13 12:07:35,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 191 [2022-12-13 12:07:35,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 4194 transitions, 138181 flow. Second operand has 25 states, 25 states have (on average 80.48) internal successors, (2012), 25 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:35,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:07:35,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 191 [2022-12-13 12:07:35,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:08:33,300 INFO L130 PetriNetUnfolder]: 16248/32052 cut-off events. [2022-12-13 12:08:33,300 INFO L131 PetriNetUnfolder]: For 9089665/9089665 co-relation queries the response was YES. [2022-12-13 12:08:33,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549631 conditions, 32052 events. 16248/32052 cut-off events. For 9089665/9089665 co-relation queries the response was YES. Maximal size of possible extension queue 2462. Compared 331013 event pairs, 659 based on Foata normal form. 808/32860 useless extension candidates. Maximal degree in co-relation 549411. Up to 10049 conditions per place. [2022-12-13 12:08:34,101 INFO L137 encePairwiseOnDemand]: 184/191 looper letters, 1721 selfloop transitions, 3627 changer transitions 77/5425 dead transitions. [2022-12-13 12:08:34,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 5425 transitions, 188152 flow [2022-12-13 12:08:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 12:08:34,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-13 12:08:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4296 transitions. [2022-12-13 12:08:34,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4410224822913459 [2022-12-13 12:08:34,105 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4296 transitions. [2022-12-13 12:08:34,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4296 transitions. [2022-12-13 12:08:34,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:08:34,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4296 transitions. [2022-12-13 12:08:34,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 84.23529411764706) internal successors, (4296), 51 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:08:34,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 191.0) internal successors, (9932), 52 states have internal predecessors, (9932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:08:34,113 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 191.0) internal successors, (9932), 52 states have internal predecessors, (9932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:08:34,113 INFO L175 Difference]: Start difference. First operand has 814 places, 4194 transitions, 138181 flow. Second operand 51 states and 4296 transitions. [2022-12-13 12:08:34,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 5425 transitions, 188152 flow