./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- 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-b5237d8 [2022-11-21 17:03:00,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:03:00,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:03:00,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:03:00,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:03:00,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:03:00,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:03:00,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:03:00,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:03:00,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:03:00,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:03:00,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:03:00,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:03:00,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:03:00,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:03:00,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:03:00,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:03:00,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:03:00,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:03:00,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:03:00,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:03:00,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:03:00,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:03:00,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:03:00,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:03:00,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:03:00,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:03:00,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:03:00,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:03:00,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:03:00,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:03:00,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:03:00,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:03:00,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:03:01,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:03:01,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:03:01,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:03:01,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:03:01,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:03:01,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:03:01,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:03:01,007 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:03:01,049 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:03:01,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:03:01,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:03:01,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:03:01,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:03:01,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:03:01,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:03:01,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:03:01,052 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:03:01,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:03:01,054 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:03:01,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:03:01,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:03:01,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:03:01,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:03:01,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:03:01,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:03:01,055 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:03:01,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:03:01,055 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:03:01,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:03:01,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:03:01,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:03:01,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:03:01,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:03:01,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:03:01,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:03:01,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:03:01,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:03:01,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:03:01,057 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:03:01,057 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:03:01,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:03:01,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2022-11-21 17:03:01,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:03:01,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:03:01,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:03:01,390 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:03:01,391 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:03:01,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-11-21 17:03:04,475 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:03:04,668 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:03:04,669 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-11-21 17:03:04,678 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/data/90e4c89e6/2808437d50144c6dac024852b5bc50c4/FLAGc7ba288aa [2022-11-21 17:03:04,706 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/data/90e4c89e6/2808437d50144c6dac024852b5bc50c4 [2022-11-21 17:03:04,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:03:04,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:03:04,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:03:04,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:03:04,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:03:04,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:03:04" (1/1) ... [2022-11-21 17:03:04,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eaeac3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:04, skipping insertion in model container [2022-11-21 17:03:04,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:03:04" (1/1) ... [2022-11-21 17:03:04,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:03:04,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:03:04,966 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_56f4b252-8a6d-4acf-8258-7b3eec3af779/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-11-21 17:03:04,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:03:04,986 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:03:05,011 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_56f4b252-8a6d-4acf-8258-7b3eec3af779/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-11-21 17:03:05,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:03:05,031 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:03:05,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05 WrapperNode [2022-11-21 17:03:05,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:03:05,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:03:05,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:03:05,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:03:05,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,081 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2022-11-21 17:03:05,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:03:05,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:03:05,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:03:05,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:03:05,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,112 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:03:05,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:03:05,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:03:05,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:03:05,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (1/1) ... [2022-11-21 17:03:05,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:03:05,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:05,167 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:03:05,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:03:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:03:05,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 17:03:05,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 17:03:05,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 17:03:05,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 17:03:05,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:03:05,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:03:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:03:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 17:03:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 17:03:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 17:03:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:03:05,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:03:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:03:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:03:05,207 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 17:03:05,320 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:03:05,324 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:03:05,779 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:03:05,910 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:03:05,910 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 17:03:05,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:03:05 BoogieIcfgContainer [2022-11-21 17:03:05,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:03:05,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:03:05,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:03:05,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:03:05,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:03:04" (1/3) ... [2022-11-21 17:03:05,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6723c3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:03:05, skipping insertion in model container [2022-11-21 17:03:05,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:05" (2/3) ... [2022-11-21 17:03:05,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6723c3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:03:05, skipping insertion in model container [2022-11-21 17:03:05,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:03:05" (3/3) ... [2022-11-21 17:03:05,928 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2022-11-21 17:03:05,937 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 17:03:05,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:03:05,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 17:03:05,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 17:03:06,022 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 17:03:06,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 189 transitions, 394 flow [2022-11-21 17:03:06,224 INFO L130 PetriNetUnfolder]: 15/187 cut-off events. [2022-11-21 17:03:06,224 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 17:03:06,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 101 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2022-11-21 17:03:06,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 189 transitions, 394 flow [2022-11-21 17:03:06,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 178 transitions, 368 flow [2022-11-21 17:03:06,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:03:06,276 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7eb115f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:03:06,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-21 17:03:06,343 INFO L130 PetriNetUnfolder]: 15/177 cut-off events. [2022-11-21 17:03:06,344 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 17:03:06,344 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:03:06,345 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:06,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:03:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash -391978347, now seen corresponding path program 1 times [2022-11-21 17:03:06,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:06,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476317328] [2022-11-21 17:03:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:06,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:03:06,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476317328] [2022-11-21 17:03:06,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476317328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:03:06,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:03:06,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:03:06,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837465527] [2022-11-21 17:03:06,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:06,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 17:03:06,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:06,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 17:03:06,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:03:06,695 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 189 [2022-11-21 17:03:06,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 178 transitions, 368 flow. Second operand has 2 states, 2 states have (on average 175.0) internal successors, (350), 2 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:06,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:03:06,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 189 [2022-11-21 17:03:06,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:03:06,776 INFO L130 PetriNetUnfolder]: 14/193 cut-off events. [2022-11-21 17:03:06,777 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-21 17:03:06,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 193 events. 14/193 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 171 event pairs, 3 based on Foata normal form. 15/194 useless extension candidates. Maximal degree in co-relation 147. Up to 20 conditions per place. [2022-11-21 17:03:06,780 INFO L137 encePairwiseOnDemand]: 179/189 looper letters, 7 selfloop transitions, 0 changer transitions 6/168 dead transitions. [2022-11-21 17:03:06,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 168 transitions, 362 flow [2022-11-21 17:03:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 17:03:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 17:03:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 359 transitions. [2022-11-21 17:03:06,795 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9497354497354498 [2022-11-21 17:03:06,796 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 359 transitions. [2022-11-21 17:03:06,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 359 transitions. [2022-11-21 17:03:06,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:03:06,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 359 transitions. [2022-11-21 17:03:06,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.5) internal successors, (359), 2 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:06,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:06,812 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:06,814 INFO L175 Difference]: Start difference. First operand has 170 places, 178 transitions, 368 flow. Second operand 2 states and 359 transitions. [2022-11-21 17:03:06,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 168 transitions, 362 flow [2022-11-21 17:03:06,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 168 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 17:03:06,825 INFO L231 Difference]: Finished difference. Result has 167 places, 162 transitions, 328 flow [2022-11-21 17:03:06,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=328, PETRI_PLACES=167, PETRI_TRANSITIONS=162} [2022-11-21 17:03:06,832 INFO L288 CegarLoopForPetriNet]: 170 programPoint places, -3 predicate places. [2022-11-21 17:03:06,832 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 162 transitions, 328 flow [2022-11-21 17:03:06,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 175.0) internal successors, (350), 2 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:06,833 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:03:06,833 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:06,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:03:06,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:03:06,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:06,835 INFO L85 PathProgramCache]: Analyzing trace with hash 962025419, now seen corresponding path program 1 times [2022-11-21 17:03:06,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:06,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320340857] [2022-11-21 17:03:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:06,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:03:07,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:07,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320340857] [2022-11-21 17:03:07,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320340857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:03:07,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:03:07,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:03:07,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438215005] [2022-11-21 17:03:07,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:07,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:03:07,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:03:07,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:03:07,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 189 [2022-11-21 17:03:07,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 162 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:07,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:03:07,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 189 [2022-11-21 17:03:07,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:03:07,944 INFO L130 PetriNetUnfolder]: 56/309 cut-off events. [2022-11-21 17:03:07,944 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 17:03:07,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 309 events. 56/309 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 851 event pairs, 12 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 445. Up to 64 conditions per place. [2022-11-21 17:03:07,951 INFO L137 encePairwiseOnDemand]: 183/189 looper letters, 45 selfloop transitions, 5 changer transitions 0/171 dead transitions. [2022-11-21 17:03:07,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 171 transitions, 447 flow [2022-11-21 17:03:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:03:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 17:03:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 837 transitions. [2022-11-21 17:03:07,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2022-11-21 17:03:07,961 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 837 transitions. [2022-11-21 17:03:07,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 837 transitions. [2022-11-21 17:03:07,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:03:07,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 837 transitions. [2022-11-21 17:03:07,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.5) internal successors, (837), 6 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:07,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:07,973 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:07,974 INFO L175 Difference]: Start difference. First operand has 167 places, 162 transitions, 328 flow. Second operand 6 states and 837 transitions. [2022-11-21 17:03:07,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 171 transitions, 447 flow [2022-11-21 17:03:07,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 171 transitions, 447 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 17:03:07,983 INFO L231 Difference]: Finished difference. Result has 167 places, 163 transitions, 346 flow [2022-11-21 17:03:07,984 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=167, PETRI_TRANSITIONS=163} [2022-11-21 17:03:07,985 INFO L288 CegarLoopForPetriNet]: 170 programPoint places, -3 predicate places. [2022-11-21 17:03:07,986 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 163 transitions, 346 flow [2022-11-21 17:03:07,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:07,987 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:03:07,988 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:07,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:03:07,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:03:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:07,992 INFO L85 PathProgramCache]: Analyzing trace with hash 721079469, now seen corresponding path program 1 times [2022-11-21 17:03:07,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:07,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360389267] [2022-11-21 17:03:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:07,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:03:08,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:08,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360389267] [2022-11-21 17:03:08,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360389267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:03:08,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:03:08,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 17:03:08,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124693989] [2022-11-21 17:03:08,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:08,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 17:03:08,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:08,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 17:03:08,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:03:08,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 189 [2022-11-21 17:03:08,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 163 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:08,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:03:08,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 189 [2022-11-21 17:03:08,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:03:08,630 INFO L130 PetriNetUnfolder]: 57/353 cut-off events. [2022-11-21 17:03:08,630 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-21 17:03:08,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 353 events. 57/353 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 969 event pairs, 12 based on Foata normal form. 4/338 useless extension candidates. Maximal degree in co-relation 525. Up to 60 conditions per place. [2022-11-21 17:03:08,633 INFO L137 encePairwiseOnDemand]: 179/189 looper letters, 46 selfloop transitions, 8 changer transitions 7/182 dead transitions. [2022-11-21 17:03:08,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 182 transitions, 511 flow [2022-11-21 17:03:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 17:03:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 17:03:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1158 transitions. [2022-11-21 17:03:08,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7658730158730159 [2022-11-21 17:03:08,637 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1158 transitions. [2022-11-21 17:03:08,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1158 transitions. [2022-11-21 17:03:08,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:03:08,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1158 transitions. [2022-11-21 17:03:08,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.75) internal successors, (1158), 8 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:08,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 189.0) internal successors, (1701), 9 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:08,647 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 189.0) internal successors, (1701), 9 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:08,648 INFO L175 Difference]: Start difference. First operand has 167 places, 163 transitions, 346 flow. Second operand 8 states and 1158 transitions. [2022-11-21 17:03:08,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 182 transitions, 511 flow [2022-11-21 17:03:08,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 182 transitions, 501 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 17:03:08,657 INFO L231 Difference]: Finished difference. Result has 172 places, 164 transitions, 364 flow [2022-11-21 17:03:08,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=172, PETRI_TRANSITIONS=164} [2022-11-21 17:03:08,659 INFO L288 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2022-11-21 17:03:08,659 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 164 transitions, 364 flow [2022-11-21 17:03:08,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:08,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:03:08,660 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:08,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 17:03:08,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:03:08,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:08,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1872479968, now seen corresponding path program 1 times [2022-11-21 17:03:08,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:08,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969576567] [2022-11-21 17:03:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:08,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:03:08,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:08,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969576567] [2022-11-21 17:03:08,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969576567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:03:08,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:03:08,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:03:08,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010195330] [2022-11-21 17:03:08,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:08,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:03:08,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:08,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:03:08,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:03:08,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 189 [2022-11-21 17:03:08,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 164 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:08,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:03:08,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 189 [2022-11-21 17:03:08,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:03:09,171 INFO L130 PetriNetUnfolder]: 119/471 cut-off events. [2022-11-21 17:03:09,171 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-11-21 17:03:09,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 471 events. 119/471 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1854 event pairs, 14 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 760. Up to 80 conditions per place. [2022-11-21 17:03:09,177 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 32 selfloop transitions, 9 changer transitions 0/184 dead transitions. [2022-11-21 17:03:09,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 184 transitions, 498 flow [2022-11-21 17:03:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:03:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 17:03:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 831 transitions. [2022-11-21 17:03:09,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8793650793650793 [2022-11-21 17:03:09,181 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 831 transitions. [2022-11-21 17:03:09,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 831 transitions. [2022-11-21 17:03:09,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:03:09,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 831 transitions. [2022-11-21 17:03:09,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:09,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:09,193 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:09,193 INFO L175 Difference]: Start difference. First operand has 172 places, 164 transitions, 364 flow. Second operand 5 states and 831 transitions. [2022-11-21 17:03:09,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 184 transitions, 498 flow [2022-11-21 17:03:09,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 184 transitions, 478 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-21 17:03:09,200 INFO L231 Difference]: Finished difference. Result has 172 places, 170 transitions, 406 flow [2022-11-21 17:03:09,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=406, PETRI_PLACES=172, PETRI_TRANSITIONS=170} [2022-11-21 17:03:09,202 INFO L288 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2022-11-21 17:03:09,206 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 170 transitions, 406 flow [2022-11-21 17:03:09,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:09,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:03:09,208 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:09,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 17:03:09,209 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:03:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:09,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1416524864, now seen corresponding path program 2 times [2022-11-21 17:03:09,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:09,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839058982] [2022-11-21 17:03:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:03:09,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839058982] [2022-11-21 17:03:09,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839058982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:03:09,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:03:09,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:03:09,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360437435] [2022-11-21 17:03:09,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:09,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:03:09,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:09,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:03:09,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:03:09,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 189 [2022-11-21 17:03:09,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 170 transitions, 406 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:09,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:03:09,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 189 [2022-11-21 17:03:09,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:03:09,780 INFO L130 PetriNetUnfolder]: 77/411 cut-off events. [2022-11-21 17:03:09,781 INFO L131 PetriNetUnfolder]: For 165/166 co-relation queries the response was YES. [2022-11-21 17:03:09,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 411 events. 77/411 cut-off events. For 165/166 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1480 event pairs, 16 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 713. Up to 70 conditions per place. [2022-11-21 17:03:09,785 INFO L137 encePairwiseOnDemand]: 184/189 looper letters, 43 selfloop transitions, 2 changer transitions 4/182 dead transitions. [2022-11-21 17:03:09,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 182 transitions, 552 flow [2022-11-21 17:03:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:03:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 17:03:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 734 transitions. [2022-11-21 17:03:09,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7767195767195767 [2022-11-21 17:03:09,788 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 734 transitions. [2022-11-21 17:03:09,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 734 transitions. [2022-11-21 17:03:09,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:03:09,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 734 transitions. [2022-11-21 17:03:09,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:09,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:09,794 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:09,794 INFO L175 Difference]: Start difference. First operand has 172 places, 170 transitions, 406 flow. Second operand 5 states and 734 transitions. [2022-11-21 17:03:09,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 182 transitions, 552 flow [2022-11-21 17:03:09,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 182 transitions, 552 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 17:03:09,802 INFO L231 Difference]: Finished difference. Result has 179 places, 171 transitions, 422 flow [2022-11-21 17:03:09,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=179, PETRI_TRANSITIONS=171} [2022-11-21 17:03:09,805 INFO L288 CegarLoopForPetriNet]: 170 programPoint places, 9 predicate places. [2022-11-21 17:03:09,805 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 171 transitions, 422 flow [2022-11-21 17:03:09,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:09,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:03:09,806 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:09,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 17:03:09,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:03:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash -370848198, now seen corresponding path program 1 times [2022-11-21 17:03:09,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:09,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922072333] [2022-11-21 17:03:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:09,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:03:10,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:10,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922072333] [2022-11-21 17:03:10,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922072333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:03:10,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:03:10,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:03:10,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717749316] [2022-11-21 17:03:10,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:10,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:03:10,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:10,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:03:10,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:03:10,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 189 [2022-11-21 17:03:10,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 171 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:10,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:03:10,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 189 [2022-11-21 17:03:10,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:03:10,192 INFO L130 PetriNetUnfolder]: 62/418 cut-off events. [2022-11-21 17:03:10,192 INFO L131 PetriNetUnfolder]: For 163/166 co-relation queries the response was YES. [2022-11-21 17:03:10,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 418 events. 62/418 cut-off events. For 163/166 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1487 event pairs, 12 based on Foata normal form. 7/403 useless extension candidates. Maximal degree in co-relation 709. Up to 86 conditions per place. [2022-11-21 17:03:10,196 INFO L137 encePairwiseOnDemand]: 186/189 looper letters, 25 selfloop transitions, 2 changer transitions 2/181 dead transitions. [2022-11-21 17:03:10,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 181 transitions, 531 flow [2022-11-21 17:03:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:03:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 17:03:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2022-11-21 17:03:10,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.908289241622575 [2022-11-21 17:03:10,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2022-11-21 17:03:10,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2022-11-21 17:03:10,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:03:10,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2022-11-21 17:03:10,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 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) [2022-11-21 17:03:10,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:10,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:10,203 INFO L175 Difference]: Start difference. First operand has 179 places, 171 transitions, 422 flow. Second operand 3 states and 515 transitions. [2022-11-21 17:03:10,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 181 transitions, 531 flow [2022-11-21 17:03:10,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 181 transitions, 525 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-21 17:03:10,209 INFO L231 Difference]: Finished difference. Result has 177 places, 172 transitions, 428 flow [2022-11-21 17:03:10,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=428, PETRI_PLACES=177, PETRI_TRANSITIONS=172} [2022-11-21 17:03:10,210 INFO L288 CegarLoopForPetriNet]: 170 programPoint places, 7 predicate places. [2022-11-21 17:03:10,210 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 172 transitions, 428 flow [2022-11-21 17:03:10,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:10,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:03:10,211 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:10,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 17:03:10,212 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:03:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1626638925, now seen corresponding path program 1 times [2022-11-21 17:03:10,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:10,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189837888] [2022-11-21 17:03:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:10,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:03:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:10,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189837888] [2022-11-21 17:03:10,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189837888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:03:10,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:03:10,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:03:10,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989360688] [2022-11-21 17:03:10,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:10,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:03:10,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:10,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:03:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:03:10,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 189 [2022-11-21 17:03:10,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 172 transitions, 428 flow. Second operand has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:10,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:03:10,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 189 [2022-11-21 17:03:10,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:03:10,680 INFO L130 PetriNetUnfolder]: 63/552 cut-off events. [2022-11-21 17:03:10,680 INFO L131 PetriNetUnfolder]: For 211/217 co-relation queries the response was YES. [2022-11-21 17:03:10,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 964 conditions, 552 events. 63/552 cut-off events. For 211/217 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2124 event pairs, 19 based on Foata normal form. 6/531 useless extension candidates. Maximal degree in co-relation 952. Up to 94 conditions per place. [2022-11-21 17:03:10,684 INFO L137 encePairwiseOnDemand]: 179/189 looper letters, 34 selfloop transitions, 8 changer transitions 22/198 dead transitions. [2022-11-21 17:03:10,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 198 transitions, 642 flow [2022-11-21 17:03:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 17:03:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 17:03:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1361 transitions. [2022-11-21 17:03:10,687 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8001175778953556 [2022-11-21 17:03:10,688 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1361 transitions. [2022-11-21 17:03:10,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1361 transitions. [2022-11-21 17:03:10,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:03:10,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1361 transitions. [2022-11-21 17:03:10,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.22222222222223) internal successors, (1361), 9 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:10,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:10,695 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:10,695 INFO L175 Difference]: Start difference. First operand has 177 places, 172 transitions, 428 flow. Second operand 9 states and 1361 transitions. [2022-11-21 17:03:10,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 198 transitions, 642 flow [2022-11-21 17:03:10,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 198 transitions, 640 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 17:03:10,701 INFO L231 Difference]: Finished difference. Result has 186 places, 173 transitions, 454 flow [2022-11-21 17:03:10,701 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=454, PETRI_PLACES=186, PETRI_TRANSITIONS=173} [2022-11-21 17:03:10,702 INFO L288 CegarLoopForPetriNet]: 170 programPoint places, 16 predicate places. [2022-11-21 17:03:10,702 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 173 transitions, 454 flow [2022-11-21 17:03:10,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:03:10,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:03:10,703 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:10,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 17:03:10,704 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:03:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash -648559060, now seen corresponding path program 1 times [2022-11-21 17:03:10,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:10,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635904325] [2022-11-21 17:03:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:10,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:03:13,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:13,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635904325] [2022-11-21 17:03:13,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635904325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:03:13,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515975687] [2022-11-21 17:03:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:13,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:13,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:13,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:03:13,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:03:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:13,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-21 17:03:13,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:03:13,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 17:03:14,197 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 17:03:14,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-21 17:03:14,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 17:03:15,482 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-21 17:03:15,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 17:03:15,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 17:03:16,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 17:03:16,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 17:03:17,490 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-21 17:03:17,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2022-11-21 17:03:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:03:17,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:03:25,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:03:25,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 90 [2022-11-21 17:03:25,161 INFO L321 Elim1Store]: treesize reduction 9, result has 82.4 percent of original size [2022-11-21 17:03:25,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 13804 treesize of output 12821 [2022-11-21 17:03:25,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:03:25,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:03:25,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12780 treesize of output 11276 [2022-11-21 17:03:25,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:03:25,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:03:25,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 11244 treesize of output 8204 [2022-11-21 17:03:25,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:03:25,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:03:25,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 8172 treesize of output 7436 [2022-11-21 17:12:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:47,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515975687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:12:47,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:12:47,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33, 30] total 77 [2022-11-21 17:12:47,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764444757] [2022-11-21 17:12:47,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:12:47,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-21 17:12:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-21 17:12:47,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=888, Invalid=4866, Unknown=98, NotChecked=0, Total=5852 [2022-11-21 17:12:47,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 189 [2022-11-21 17:12:47,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 173 transitions, 454 flow. Second operand has 77 states, 77 states have (on average 58.753246753246756) internal successors, (4524), 77 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:12:47,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:12:47,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 189 [2022-11-21 17:12:47,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:13:54,416 WARN L233 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 234 DAG size of output: 218 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:13:56,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:14:43,874 WARN L233 SmtUtils]: Spent 45.25s on a formula simplification. DAG size of input: 202 DAG size of output: 193 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:14:57,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:14:59,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:15:07,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:15:11,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:15:18,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:15:21,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:15:25,153 INFO L130 PetriNetUnfolder]: 4997/9614 cut-off events. [2022-11-21 17:15:25,153 INFO L131 PetriNetUnfolder]: For 4967/4967 co-relation queries the response was YES. [2022-11-21 17:15:25,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23531 conditions, 9614 events. 4997/9614 cut-off events. For 4967/4967 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 78353 event pairs, 326 based on Foata normal form. 2/9260 useless extension candidates. Maximal degree in co-relation 23517. Up to 1478 conditions per place. [2022-11-21 17:15:25,209 INFO L137 encePairwiseOnDemand]: 142/189 looper letters, 524 selfloop transitions, 191 changer transitions 131/895 dead transitions. [2022-11-21 17:15:25,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 895 transitions, 4715 flow [2022-11-21 17:15:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-21 17:15:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-11-21 17:15:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 6032 transitions. [2022-11-21 17:15:25,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3324514991181658 [2022-11-21 17:15:25,232 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 6032 transitions. [2022-11-21 17:15:25,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 6032 transitions. [2022-11-21 17:15:25,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:15:25,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 6032 transitions. [2022-11-21 17:15:25,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 62.833333333333336) internal successors, (6032), 96 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:25,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 189.0) internal successors, (18333), 97 states have internal predecessors, (18333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:25,283 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 189.0) internal successors, (18333), 97 states have internal predecessors, (18333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:25,283 INFO L175 Difference]: Start difference. First operand has 186 places, 173 transitions, 454 flow. Second operand 96 states and 6032 transitions. [2022-11-21 17:15:25,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 895 transitions, 4715 flow [2022-11-21 17:15:25,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 895 transitions, 4681 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-11-21 17:15:25,313 INFO L231 Difference]: Finished difference. Result has 331 places, 371 transitions, 2094 flow [2022-11-21 17:15:25,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=2094, PETRI_PLACES=331, PETRI_TRANSITIONS=371} [2022-11-21 17:15:25,314 INFO L288 CegarLoopForPetriNet]: 170 programPoint places, 161 predicate places. [2022-11-21 17:15:25,314 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 371 transitions, 2094 flow [2022-11-21 17:15:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 58.753246753246756) internal successors, (4524), 77 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:25,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:15:25,317 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:15:25,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:15:25,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:15:25,536 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:15:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:15:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash 870249240, now seen corresponding path program 2 times [2022-11-21 17:15:25,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:15:25,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096174869] [2022-11-21 17:15:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:15:25,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:15:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:15:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:15:29,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:15:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096174869] [2022-11-21 17:15:29,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096174869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:15:29,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113892634] [2022-11-21 17:15:29,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:15:29,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:15:29,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:15:29,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:15:29,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:15:29,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:15:29,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:15:29,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-21 17:15:29,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:15:34,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:15:34,859 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-21 17:15:34,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2022-11-21 17:15:34,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-21 17:15:35,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-21 17:15:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:15:35,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:15:36,816 INFO L321 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-11-21 17:15:36,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 72 [2022-11-21 17:15:36,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-11-21 17:15:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:15:40,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113892634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:15:40,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:15:40,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 27] total 72 [2022-11-21 17:15:40,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013901508] [2022-11-21 17:15:40,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:15:40,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-21 17:15:40,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:15:40,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-21 17:15:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=4645, Unknown=2, NotChecked=0, Total=5112 [2022-11-21 17:15:40,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 189 [2022-11-21 17:15:40,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 371 transitions, 2094 flow. Second operand has 72 states, 72 states have (on average 59.97222222222222) internal successors, (4318), 72 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:40,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:15:40,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 189 [2022-11-21 17:15:40,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:16:03,287 WARN L233 SmtUtils]: Spent 18.56s on a formula simplification. DAG size of input: 69 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:16:20,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:16:25,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:16:59,810 INFO L130 PetriNetUnfolder]: 9581/17847 cut-off events. [2022-11-21 17:16:59,810 INFO L131 PetriNetUnfolder]: For 134906/135018 co-relation queries the response was YES. [2022-11-21 17:16:59,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77590 conditions, 17847 events. 9581/17847 cut-off events. For 134906/135018 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 156720 event pairs, 835 based on Foata normal form. 185/17928 useless extension candidates. Maximal degree in co-relation 77519. Up to 2901 conditions per place. [2022-11-21 17:17:00,040 INFO L137 encePairwiseOnDemand]: 135/189 looper letters, 749 selfloop transitions, 410 changer transitions 91/1299 dead transitions. [2022-11-21 17:17:00,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1299 transitions, 11561 flow [2022-11-21 17:17:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-21 17:17:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2022-11-21 17:17:00,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 7917 transitions. [2022-11-21 17:17:00,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3324514991181658 [2022-11-21 17:17:00,057 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 7917 transitions. [2022-11-21 17:17:00,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 7917 transitions. [2022-11-21 17:17:00,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:17:00,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 7917 transitions. [2022-11-21 17:17:00,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 62.833333333333336) internal successors, (7917), 126 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:00,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 189.0) internal successors, (24003), 127 states have internal predecessors, (24003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:00,132 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 189.0) internal successors, (24003), 127 states have internal predecessors, (24003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:00,132 INFO L175 Difference]: Start difference. First operand has 331 places, 371 transitions, 2094 flow. Second operand 126 states and 7917 transitions. [2022-11-21 17:17:00,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1299 transitions, 11561 flow [2022-11-21 17:17:00,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1299 transitions, 10694 flow, removed 412 selfloop flow, removed 26 redundant places. [2022-11-21 17:17:00,971 INFO L231 Difference]: Finished difference. Result has 465 places, 630 transitions, 5208 flow [2022-11-21 17:17:00,972 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=5208, PETRI_PLACES=465, PETRI_TRANSITIONS=630} [2022-11-21 17:17:00,973 INFO L288 CegarLoopForPetriNet]: 170 programPoint places, 295 predicate places. [2022-11-21 17:17:00,973 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 630 transitions, 5208 flow [2022-11-21 17:17:00,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 59.97222222222222) internal successors, (4318), 72 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:00,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:17:00,975 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:17:00,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:17:01,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 17:17:01,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:17:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:17:01,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1010984726, now seen corresponding path program 3 times [2022-11-21 17:17:01,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:17:01,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342847468] [2022-11-21 17:17:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:17:01,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:17:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:17:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:17:05,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:17:05,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342847468] [2022-11-21 17:17:05,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342847468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:17:05,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463427369] [2022-11-21 17:17:05,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:17:05,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:17:05,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:17:05,199 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:17:05,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56f4b252-8a6d-4acf-8258-7b3eec3af779/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:17:05,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 17:17:05,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:17:05,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-21 17:17:05,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:17:09,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:09,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-21 17:17:10,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:17:10,068 INFO L321 Elim1Store]: treesize reduction 37, result has 7.5 percent of original size [2022-11-21 17:17:10,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 13 [2022-11-21 17:17:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:17:10,127 INFO L328 TraceCheckSpWp]: Computing backward predicates...