./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8 --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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- 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-e04fb08 [2022-11-16 11:36:55,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:36:55,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:36:55,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:36:55,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:36:55,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:36:55,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:36:55,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:36:55,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:36:55,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:36:55,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:36:55,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:36:55,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:36:55,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:36:55,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:36:55,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:36:55,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:36:55,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:36:55,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:36:55,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:36:55,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:36:55,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:36:55,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:36:55,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:36:55,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:36:55,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:36:55,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:36:55,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:36:55,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:36:55,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:36:55,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:36:55,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:36:55,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:36:55,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:36:55,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:36:55,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:36:55,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:36:55,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:36:55,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:36:55,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:36:55,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:36:55,627 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:36:55,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:36:55,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:36:55,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:36:55,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:36:55,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:36:55,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:36:55,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:36:55,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:36:55,668 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:36:55,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:36:55,670 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:36:55,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:36:55,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:36:55,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:36:55,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:36:55,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:36:55,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:36:55,671 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:36:55,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:36:55,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:36:55,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:36:55,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:36:55,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:36:55,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:36:55,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:36:55,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:36:55,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:36:55,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:36:55,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:36:55,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:36:55,674 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:36:55,674 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:36:55,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:36:55,675 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_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-11-16 11:36:55,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:36:55,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:36:55,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:36:55,958 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:36:55,959 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:36:55,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-16 11:36:56,021 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/data/aefbf549f/41a476592d924e199f27cd9ec07b2d3f/FLAG01d7d9a7f [2022-11-16 11:36:56,537 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:36:56,538 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-16 11:36:56,545 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/data/aefbf549f/41a476592d924e199f27cd9ec07b2d3f/FLAG01d7d9a7f [2022-11-16 11:36:56,914 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/data/aefbf549f/41a476592d924e199f27cd9ec07b2d3f [2022-11-16 11:36:56,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:36:56,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:36:56,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:36:56,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:36:56,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:36:56,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:36:56" (1/1) ... [2022-11-16 11:36:56,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6770caa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:56, skipping insertion in model container [2022-11-16 11:36:56,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:36:56" (1/1) ... [2022-11-16 11:36:56,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:36:56,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:36:57,177 WARN L229 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_31342c6a-367c-45c5-b931-e6f340d55e62/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-16 11:36:57,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:36:57,188 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:36:57,221 WARN L229 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_31342c6a-367c-45c5-b931-e6f340d55e62/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-16 11:36:57,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:36:57,235 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:36:57,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57 WrapperNode [2022-11-16 11:36:57,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:36:57,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:36:57,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:36:57,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:36:57,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,277 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2022-11-16 11:36:57,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:36:57,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:36:57,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:36:57,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:36:57,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,299 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:36:57,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:36:57,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:36:57,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:36:57,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (1/1) ... [2022-11-16 11:36:57,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:36:57,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:57,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:36:57,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:36:57,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:36:57,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:36:57,392 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:36:57,392 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:36:57,392 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:36:57,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:36:57,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:36:57,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:36:57,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:36:57,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:36:57,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:36:57,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:36:57,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:36:57,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:36:57,394 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:36:57,501 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:36:57,504 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:36:57,809 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:36:57,887 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:36:57,887 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:36:57,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:36:57 BoogieIcfgContainer [2022-11-16 11:36:57,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:36:57,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:36:57,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:36:57,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:36:57,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:36:56" (1/3) ... [2022-11-16 11:36:57,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef939c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:36:57, skipping insertion in model container [2022-11-16 11:36:57,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:57" (2/3) ... [2022-11-16 11:36:57,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef939c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:36:57, skipping insertion in model container [2022-11-16 11:36:57,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:36:57" (3/3) ... [2022-11-16 11:36:57,917 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-11-16 11:36:57,926 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:36:57,937 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:36:57,937 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:36:57,937 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:36:57,999 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:36:58,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2022-11-16 11:36:58,099 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-16 11:36:58,100 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:36:58,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-16 11:36:58,105 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2022-11-16 11:36:58,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2022-11-16 11:36:58,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:58,127 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;@31f1682d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:58,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:36:58,151 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-11-16 11:36:58,151 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:36:58,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:58,152 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] [2022-11-16 11:36:58,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:58,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash 8248533, now seen corresponding path program 1 times [2022-11-16 11:36:58,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:58,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988996472] [2022-11-16 11:36:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:58,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:58,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:58,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988996472] [2022-11-16 11:36:58,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988996472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:58,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:58,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:58,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977024480] [2022-11-16 11:36:58,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:58,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:58,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:58,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:58,483 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2022-11-16 11:36:58,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:58,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:58,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2022-11-16 11:36:58,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:58,562 INFO L130 PetriNetUnfolder]: 11/107 cut-off events. [2022-11-16 11:36:58,563 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-11-16 11:36:58,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-11-16 11:36:58,565 INFO L137 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2022-11-16 11:36:58,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2022-11-16 11:36:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2022-11-16 11:36:58,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2022-11-16 11:36:58,579 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2022-11-16 11:36:58,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2022-11-16 11:36:58,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:58,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2022-11-16 11:36:58,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:58,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:58,590 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:58,592 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2022-11-16 11:36:58,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2022-11-16 11:36:58,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:36:58,599 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2022-11-16 11:36:58,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-11-16 11:36:58,605 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-11-16 11:36:58,605 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2022-11-16 11:36:58,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:58,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:58,606 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] [2022-11-16 11:36:58,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:36:58,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:58,611 INFO L85 PathProgramCache]: Analyzing trace with hash -989012563, now seen corresponding path program 1 times [2022-11-16 11:36:58,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:58,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138455806] [2022-11-16 11:36:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:58,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:59,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138455806] [2022-11-16 11:36:59,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138455806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:59,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:59,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-16 11:36:59,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203130423] [2022-11-16 11:36:59,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:59,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:36:59,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:36:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:36:59,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-16 11:36:59,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:59,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:59,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-16 11:36:59,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:00,356 INFO L130 PetriNetUnfolder]: 68/258 cut-off events. [2022-11-16 11:37:00,356 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-16 11:37:00,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 258 events. 68/258 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1049 event pairs, 16 based on Foata normal form. 8/236 useless extension candidates. Maximal degree in co-relation 430. Up to 101 conditions per place. [2022-11-16 11:37:00,359 INFO L137 encePairwiseOnDemand]: 76/89 looper letters, 40 selfloop transitions, 7 changer transitions 11/101 dead transitions. [2022-11-16 11:37:00,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 101 transitions, 330 flow [2022-11-16 11:37:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:37:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:37:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 699 transitions. [2022-11-16 11:37:00,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6544943820224719 [2022-11-16 11:37:00,365 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 699 transitions. [2022-11-16 11:37:00,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 699 transitions. [2022-11-16 11:37:00,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:00,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 699 transitions. [2022-11-16 11:37:00,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.25) internal successors, (699), 12 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:00,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:00,375 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:00,375 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 699 transitions. [2022-11-16 11:37:00,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 101 transitions, 330 flow [2022-11-16 11:37:00,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:37:00,378 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 194 flow [2022-11-16 11:37:00,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=194, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2022-11-16 11:37:00,380 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2022-11-16 11:37:00,380 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 194 flow [2022-11-16 11:37:00,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:00,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:00,381 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] [2022-11-16 11:37:00,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:37:00,382 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1809878765, now seen corresponding path program 2 times [2022-11-16 11:37:00,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:00,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696857761] [2022-11-16 11:37:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:00,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:00,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:00,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696857761] [2022-11-16 11:37:00,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696857761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:00,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:00,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-16 11:37:00,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205082814] [2022-11-16 11:37:00,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:00,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:37:00,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:00,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:37:00,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:37:00,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-16 11:37:00,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 74 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:00,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:00,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-16 11:37:00,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:01,510 INFO L130 PetriNetUnfolder]: 65/255 cut-off events. [2022-11-16 11:37:01,510 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2022-11-16 11:37:01,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 255 events. 65/255 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1021 event pairs, 39 based on Foata normal form. 1/251 useless extension candidates. Maximal degree in co-relation 528. Up to 102 conditions per place. [2022-11-16 11:37:01,516 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 41 selfloop transitions, 11 changer transitions 8/103 dead transitions. [2022-11-16 11:37:01,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 103 transitions, 422 flow [2022-11-16 11:37:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:37:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:37:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 697 transitions. [2022-11-16 11:37:01,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6526217228464419 [2022-11-16 11:37:01,521 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 697 transitions. [2022-11-16 11:37:01,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 697 transitions. [2022-11-16 11:37:01,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:01,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 697 transitions. [2022-11-16 11:37:01,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.083333333333336) internal successors, (697), 12 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:01,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:01,530 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:01,530 INFO L175 Difference]: Start difference. First operand has 92 places, 74 transitions, 194 flow. Second operand 12 states and 697 transitions. [2022-11-16 11:37:01,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 103 transitions, 422 flow [2022-11-16 11:37:01,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 103 transitions, 385 flow, removed 11 selfloop flow, removed 9 redundant places. [2022-11-16 11:37:01,540 INFO L231 Difference]: Finished difference. Result has 97 places, 80 transitions, 244 flow [2022-11-16 11:37:01,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=244, PETRI_PLACES=97, PETRI_TRANSITIONS=80} [2022-11-16 11:37:01,542 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 18 predicate places. [2022-11-16 11:37:01,543 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 244 flow [2022-11-16 11:37:01,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:01,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:01,544 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] [2022-11-16 11:37:01,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:37:01,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:01,545 INFO L85 PathProgramCache]: Analyzing trace with hash 521887829, now seen corresponding path program 3 times [2022-11-16 11:37:01,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:01,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486241621] [2022-11-16 11:37:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:01,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:02,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:02,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486241621] [2022-11-16 11:37:02,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486241621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:02,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:02,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-16 11:37:02,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463440174] [2022-11-16 11:37:02,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:02,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:37:02,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:02,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:37:02,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:37:02,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-16 11:37:02,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 80 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:02,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-16 11:37:02,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:02,338 INFO L130 PetriNetUnfolder]: 72/299 cut-off events. [2022-11-16 11:37:02,338 INFO L131 PetriNetUnfolder]: For 153/165 co-relation queries the response was YES. [2022-11-16 11:37:02,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 299 events. 72/299 cut-off events. For 153/165 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1363 event pairs, 35 based on Foata normal form. 4/297 useless extension candidates. Maximal degree in co-relation 651. Up to 105 conditions per place. [2022-11-16 11:37:02,341 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 7/112 dead transitions. [2022-11-16 11:37:02,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 504 flow [2022-11-16 11:37:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:37:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:37:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 701 transitions. [2022-11-16 11:37:02,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6563670411985019 [2022-11-16 11:37:02,344 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 701 transitions. [2022-11-16 11:37:02,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 701 transitions. [2022-11-16 11:37:02,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:02,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 701 transitions. [2022-11-16 11:37:02,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.416666666666664) internal successors, (701), 12 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,349 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,349 INFO L175 Difference]: Start difference. First operand has 97 places, 80 transitions, 244 flow. Second operand 12 states and 701 transitions. [2022-11-16 11:37:02,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 504 flow [2022-11-16 11:37:02,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 112 transitions, 469 flow, removed 11 selfloop flow, removed 7 redundant places. [2022-11-16 11:37:02,354 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 307 flow [2022-11-16 11:37:02,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=307, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2022-11-16 11:37:02,355 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2022-11-16 11:37:02,355 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 307 flow [2022-11-16 11:37:02,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:02,356 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] [2022-11-16 11:37:02,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:37:02,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash 751272271, now seen corresponding path program 4 times [2022-11-16 11:37:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:02,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814108790] [2022-11-16 11:37:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:02,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:02,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814108790] [2022-11-16 11:37:02,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814108790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:02,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:02,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 11:37:02,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883323697] [2022-11-16 11:37:02,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:02,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:37:02,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:02,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:37:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:37:02,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-16 11:37:02,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:02,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-16 11:37:02,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:03,197 INFO L130 PetriNetUnfolder]: 70/297 cut-off events. [2022-11-16 11:37:03,197 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-11-16 11:37:03,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 297 events. 70/297 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1361 event pairs, 40 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 681. Up to 105 conditions per place. [2022-11-16 11:37:03,200 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 46 selfloop transitions, 15 changer transitions 9/113 dead transitions. [2022-11-16 11:37:03,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 113 transitions, 557 flow [2022-11-16 11:37:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:37:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:37:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 702 transitions. [2022-11-16 11:37:03,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2022-11-16 11:37:03,204 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 702 transitions. [2022-11-16 11:37:03,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 702 transitions. [2022-11-16 11:37:03,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:03,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 702 transitions. [2022-11-16 11:37:03,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.5) internal successors, (702), 12 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:03,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:03,212 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:03,212 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 307 flow. Second operand 12 states and 702 transitions. [2022-11-16 11:37:03,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 113 transitions, 557 flow [2022-11-16 11:37:03,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 516 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-11-16 11:37:03,222 INFO L231 Difference]: Finished difference. Result has 109 places, 85 transitions, 339 flow [2022-11-16 11:37:03,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=339, PETRI_PLACES=109, PETRI_TRANSITIONS=85} [2022-11-16 11:37:03,224 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 30 predicate places. [2022-11-16 11:37:03,225 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 85 transitions, 339 flow [2022-11-16 11:37:03,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:03,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:03,226 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] [2022-11-16 11:37:03,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:37:03,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:03,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:03,230 INFO L85 PathProgramCache]: Analyzing trace with hash -92412107, now seen corresponding path program 5 times [2022-11-16 11:37:03,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:03,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963116442] [2022-11-16 11:37:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:03,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:03,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:03,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963116442] [2022-11-16 11:37:03,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963116442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:03,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:03,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-16 11:37:03,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466959057] [2022-11-16 11:37:03,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:03,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:37:03,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:03,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:37:03,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:37:03,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-16 11:37:03,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 85 transitions, 339 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:03,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:03,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-16 11:37:03,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:04,219 INFO L130 PetriNetUnfolder]: 68/274 cut-off events. [2022-11-16 11:37:04,220 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2022-11-16 11:37:04,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 274 events. 68/274 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1187 event pairs, 38 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 647. Up to 105 conditions per place. [2022-11-16 11:37:04,222 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 15 changer transitions 8/108 dead transitions. [2022-11-16 11:37:04,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 108 transitions, 556 flow [2022-11-16 11:37:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:37:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:37:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 697 transitions. [2022-11-16 11:37:04,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6526217228464419 [2022-11-16 11:37:04,225 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 697 transitions. [2022-11-16 11:37:04,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 697 transitions. [2022-11-16 11:37:04,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:04,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 697 transitions. [2022-11-16 11:37:04,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.083333333333336) internal successors, (697), 12 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:04,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:04,230 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:04,230 INFO L175 Difference]: Start difference. First operand has 109 places, 85 transitions, 339 flow. Second operand 12 states and 697 transitions. [2022-11-16 11:37:04,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 108 transitions, 556 flow [2022-11-16 11:37:04,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 108 transitions, 510 flow, removed 12 selfloop flow, removed 9 redundant places. [2022-11-16 11:37:04,235 INFO L231 Difference]: Finished difference. Result has 112 places, 85 transitions, 346 flow [2022-11-16 11:37:04,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=346, PETRI_PLACES=112, PETRI_TRANSITIONS=85} [2022-11-16 11:37:04,236 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 33 predicate places. [2022-11-16 11:37:04,236 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 85 transitions, 346 flow [2022-11-16 11:37:04,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:04,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:04,237 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] [2022-11-16 11:37:04,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:37:04,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:04,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1623942775, now seen corresponding path program 6 times [2022-11-16 11:37:04,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:04,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135048007] [2022-11-16 11:37:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:04,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:04,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:04,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135048007] [2022-11-16 11:37:04,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135048007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:04,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:04,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-16 11:37:04,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109955993] [2022-11-16 11:37:04,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:04,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:37:04,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:04,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:37:04,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:37:04,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-16 11:37:04,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 85 transitions, 346 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:04,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:04,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-16 11:37:04,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:05,156 INFO L130 PetriNetUnfolder]: 66/239 cut-off events. [2022-11-16 11:37:05,157 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2022-11-16 11:37:05,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 239 events. 66/239 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 893 event pairs, 32 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 585. Up to 105 conditions per place. [2022-11-16 11:37:05,159 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 15 changer transitions 8/100 dead transitions. [2022-11-16 11:37:05,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 100 transitions, 517 flow [2022-11-16 11:37:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:37:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 11:37:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 689 transitions. [2022-11-16 11:37:05,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6451310861423221 [2022-11-16 11:37:05,163 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 689 transitions. [2022-11-16 11:37:05,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 689 transitions. [2022-11-16 11:37:05,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:05,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 689 transitions. [2022-11-16 11:37:05,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.416666666666664) internal successors, (689), 12 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:05,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:05,183 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:05,183 INFO L175 Difference]: Start difference. First operand has 112 places, 85 transitions, 346 flow. Second operand 12 states and 689 transitions. [2022-11-16 11:37:05,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 100 transitions, 517 flow [2022-11-16 11:37:05,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 100 transitions, 471 flow, removed 9 selfloop flow, removed 11 redundant places. [2022-11-16 11:37:05,189 INFO L231 Difference]: Finished difference. Result has 112 places, 85 transitions, 348 flow [2022-11-16 11:37:05,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=348, PETRI_PLACES=112, PETRI_TRANSITIONS=85} [2022-11-16 11:37:05,190 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 33 predicate places. [2022-11-16 11:37:05,191 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 85 transitions, 348 flow [2022-11-16 11:37:05,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:05,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:05,192 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] [2022-11-16 11:37:05,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:37:05,192 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1492579821, now seen corresponding path program 1 times [2022-11-16 11:37:05,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:05,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524812768] [2022-11-16 11:37:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:05,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:05,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:05,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524812768] [2022-11-16 11:37:05,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524812768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:05,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850603632] [2022-11-16 11:37:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:05,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:05,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:05,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:05,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:37:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:05,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:37:05,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:06,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:07,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850603632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:07,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:07,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-16 11:37:07,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573289069] [2022-11-16 11:37:07,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:07,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:37:07,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:07,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:37:07,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:37:07,345 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:37:07,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 85 transitions, 348 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:07,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:07,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:37:07,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:09,969 INFO L130 PetriNetUnfolder]: 168/592 cut-off events. [2022-11-16 11:37:09,970 INFO L131 PetriNetUnfolder]: For 507/507 co-relation queries the response was YES. [2022-11-16 11:37:09,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 592 events. 168/592 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3253 event pairs, 9 based on Foata normal form. 13/605 useless extension candidates. Maximal degree in co-relation 1356. Up to 111 conditions per place. [2022-11-16 11:37:09,975 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2022-11-16 11:37:09,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 251 transitions, 1392 flow [2022-11-16 11:37:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 11:37:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-16 11:37:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2022-11-16 11:37:09,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2022-11-16 11:37:09,982 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2022-11-16 11:37:09,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2022-11-16 11:37:09,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:09,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2022-11-16 11:37:09,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:10,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:10,002 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:10,002 INFO L175 Difference]: Start difference. First operand has 112 places, 85 transitions, 348 flow. Second operand 48 states and 2702 transitions. [2022-11-16 11:37:10,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 251 transitions, 1392 flow [2022-11-16 11:37:10,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1258 flow, removed 42 selfloop flow, removed 14 redundant places. [2022-11-16 11:37:10,010 INFO L231 Difference]: Finished difference. Result has 152 places, 152 transitions, 782 flow [2022-11-16 11:37:10,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=782, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2022-11-16 11:37:10,012 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2022-11-16 11:37:10,013 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 782 flow [2022-11-16 11:37:10,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:10,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:10,014 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] [2022-11-16 11:37:10,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:10,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:10,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:10,221 INFO L85 PathProgramCache]: Analyzing trace with hash -748226027, now seen corresponding path program 2 times [2022-11-16 11:37:10,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:10,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210550140] [2022-11-16 11:37:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:10,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:10,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210550140] [2022-11-16 11:37:10,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210550140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:10,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204853443] [2022-11-16 11:37:10,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:37:10,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:10,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:10,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:37:10,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:37:10,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:10,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:37:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:11,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:12,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204853443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:12,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:12,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-16 11:37:12,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743069398] [2022-11-16 11:37:12,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:12,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:37:12,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:12,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:37:12,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:37:12,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:37:12,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 782 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:12,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:12,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:37:12,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:14,261 INFO L130 PetriNetUnfolder]: 210/758 cut-off events. [2022-11-16 11:37:14,262 INFO L131 PetriNetUnfolder]: For 753/767 co-relation queries the response was YES. [2022-11-16 11:37:14,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 758 events. 210/758 cut-off events. For 753/767 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4631 event pairs, 27 based on Foata normal form. 5/761 useless extension candidates. Maximal degree in co-relation 2112. Up to 213 conditions per place. [2022-11-16 11:37:14,270 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 100 selfloop transitions, 122 changer transitions 6/270 dead transitions. [2022-11-16 11:37:14,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 270 transitions, 1857 flow [2022-11-16 11:37:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 11:37:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-16 11:37:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2022-11-16 11:37:14,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2022-11-16 11:37:14,275 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2022-11-16 11:37:14,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2022-11-16 11:37:14,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:14,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2022-11-16 11:37:14,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:14,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:14,297 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:14,297 INFO L175 Difference]: Start difference. First operand has 152 places, 152 transitions, 782 flow. Second operand 39 states and 2186 transitions. [2022-11-16 11:37:14,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 270 transitions, 1857 flow [2022-11-16 11:37:14,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 1627 flow, removed 102 selfloop flow, removed 9 redundant places. [2022-11-16 11:37:14,320 INFO L231 Difference]: Finished difference. Result has 186 places, 205 transitions, 1273 flow [2022-11-16 11:37:14,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1273, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2022-11-16 11:37:14,321 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 107 predicate places. [2022-11-16 11:37:14,321 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1273 flow [2022-11-16 11:37:14,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:14,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:14,323 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] [2022-11-16 11:37:14,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:14,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:37:14,529 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:14,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1865169065, now seen corresponding path program 3 times [2022-11-16 11:37:14,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:14,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785002973] [2022-11-16 11:37:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:14,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:15,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:15,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785002973] [2022-11-16 11:37:15,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785002973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:15,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574607693] [2022-11-16 11:37:15,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:37:15,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:15,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:15,093 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:15,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:37:15,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:37:15,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:15,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:37:15,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:15,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:16,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574607693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:16,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:16,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-16 11:37:16,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728009791] [2022-11-16 11:37:16,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:16,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:37:16,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:37:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:37:16,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:37:16,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1273 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:16,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:37:16,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:21,566 INFO L130 PetriNetUnfolder]: 280/1049 cut-off events. [2022-11-16 11:37:21,566 INFO L131 PetriNetUnfolder]: For 1419/1421 co-relation queries the response was YES. [2022-11-16 11:37:21,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 1049 events. 280/1049 cut-off events. For 1419/1421 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7326 event pairs, 18 based on Foata normal form. 3/1040 useless extension candidates. Maximal degree in co-relation 3148. Up to 147 conditions per place. [2022-11-16 11:37:21,578 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 158 selfloop transitions, 208 changer transitions 6/414 dead transitions. [2022-11-16 11:37:21,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 414 transitions, 3151 flow [2022-11-16 11:37:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-16 11:37:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-16 11:37:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2022-11-16 11:37:21,591 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2022-11-16 11:37:21,591 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2022-11-16 11:37:21,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2022-11-16 11:37:21,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:21,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2022-11-16 11:37:21,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.77777777777778) internal successors, (4518), 81 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:21,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:21,618 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:21,618 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 1273 flow. Second operand 81 states and 4518 transitions. [2022-11-16 11:37:21,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 414 transitions, 3151 flow [2022-11-16 11:37:21,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 414 transitions, 3102 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-11-16 11:37:21,638 INFO L231 Difference]: Finished difference. Result has 271 places, 286 transitions, 2345 flow [2022-11-16 11:37:21,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2345, PETRI_PLACES=271, PETRI_TRANSITIONS=286} [2022-11-16 11:37:21,639 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 192 predicate places. [2022-11-16 11:37:21,639 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 286 transitions, 2345 flow [2022-11-16 11:37:21,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:21,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:21,641 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] [2022-11-16 11:37:21,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:21,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:21,847 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:21,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:21,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1050485383, now seen corresponding path program 4 times [2022-11-16 11:37:21,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:21,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363255309] [2022-11-16 11:37:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:21,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:22,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:22,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363255309] [2022-11-16 11:37:22,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363255309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:22,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006739090] [2022-11-16 11:37:22,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:37:22,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:22,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:22,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:22,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:37:22,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:37:22,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:22,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:37:22,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:23,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:23,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006739090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:23,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:23,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-16 11:37:23,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511025747] [2022-11-16 11:37:23,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:23,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:37:23,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:23,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:37:23,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:37:23,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:37:23,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 286 transitions, 2345 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:23,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:23,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:37:23,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:28,383 INFO L130 PetriNetUnfolder]: 299/1078 cut-off events. [2022-11-16 11:37:28,383 INFO L131 PetriNetUnfolder]: For 4250/4252 co-relation queries the response was YES. [2022-11-16 11:37:28,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 1078 events. 299/1078 cut-off events. For 4250/4252 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7544 event pairs, 22 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 4270. Up to 157 conditions per place. [2022-11-16 11:37:28,401 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 165 selfloop transitions, 232 changer transitions 6/445 dead transitions. [2022-11-16 11:37:28,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 445 transitions, 4319 flow [2022-11-16 11:37:28,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-16 11:37:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-16 11:37:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4528 transitions. [2022-11-16 11:37:28,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6281037591899015 [2022-11-16 11:37:28,424 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4528 transitions. [2022-11-16 11:37:28,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4528 transitions. [2022-11-16 11:37:28,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:28,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4528 transitions. [2022-11-16 11:37:28,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.901234567901234) internal successors, (4528), 81 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:28,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:28,466 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:28,466 INFO L175 Difference]: Start difference. First operand has 271 places, 286 transitions, 2345 flow. Second operand 81 states and 4528 transitions. [2022-11-16 11:37:28,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 445 transitions, 4319 flow [2022-11-16 11:37:28,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 445 transitions, 4068 flow, removed 68 selfloop flow, removed 19 redundant places. [2022-11-16 11:37:28,507 INFO L231 Difference]: Finished difference. Result has 337 places, 319 transitions, 3001 flow [2022-11-16 11:37:28,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=3001, PETRI_PLACES=337, PETRI_TRANSITIONS=319} [2022-11-16 11:37:28,509 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 258 predicate places. [2022-11-16 11:37:28,509 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 319 transitions, 3001 flow [2022-11-16 11:37:28,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:28,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:28,510 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] [2022-11-16 11:37:28,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:28,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:28,719 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:28,720 INFO L85 PathProgramCache]: Analyzing trace with hash -974553547, now seen corresponding path program 5 times [2022-11-16 11:37:28,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:28,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288888522] [2022-11-16 11:37:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:28,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:29,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:29,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288888522] [2022-11-16 11:37:29,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288888522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:29,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553538655] [2022-11-16 11:37:29,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:37:29,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:29,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:29,221 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:29,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:37:29,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:37:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:29,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:37:29,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:29,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:30,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553538655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:30,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:30,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-16 11:37:30,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901860050] [2022-11-16 11:37:30,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:30,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:37:30,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:30,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:37:30,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:37:30,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:37:30,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 319 transitions, 3001 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:30,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:30,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:37:30,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:32,434 INFO L130 PetriNetUnfolder]: 300/1119 cut-off events. [2022-11-16 11:37:32,435 INFO L131 PetriNetUnfolder]: For 6095/6095 co-relation queries the response was YES. [2022-11-16 11:37:32,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4942 conditions, 1119 events. 300/1119 cut-off events. For 6095/6095 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7997 event pairs, 31 based on Foata normal form. 2/1116 useless extension candidates. Maximal degree in co-relation 4888. Up to 387 conditions per place. [2022-11-16 11:37:32,449 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 127 selfloop transitions, 190 changer transitions 12/371 dead transitions. [2022-11-16 11:37:32,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 371 transitions, 4121 flow [2022-11-16 11:37:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:37:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-16 11:37:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-11-16 11:37:32,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-11-16 11:37:32,453 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-11-16 11:37:32,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-11-16 11:37:32,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:32,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-11-16 11:37:32,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,463 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,464 INFO L175 Difference]: Start difference. First operand has 337 places, 319 transitions, 3001 flow. Second operand 33 states and 1827 transitions. [2022-11-16 11:37:32,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 371 transitions, 4121 flow [2022-11-16 11:37:32,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 371 transitions, 3682 flow, removed 46 selfloop flow, removed 56 redundant places. [2022-11-16 11:37:32,514 INFO L231 Difference]: Finished difference. Result has 321 places, 333 transitions, 3319 flow [2022-11-16 11:37:32,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3319, PETRI_PLACES=321, PETRI_TRANSITIONS=333} [2022-11-16 11:37:32,516 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 242 predicate places. [2022-11-16 11:37:32,517 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 333 transitions, 3319 flow [2022-11-16 11:37:32,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:32,518 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] [2022-11-16 11:37:32,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:32,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:32,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1819115727, now seen corresponding path program 6 times [2022-11-16 11:37:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:32,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644011656] [2022-11-16 11:37:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:32,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:33,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:33,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644011656] [2022-11-16 11:37:33,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644011656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694882050] [2022-11-16 11:37:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:37:33,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:33,215 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:33,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:37:33,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 11:37:33,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:33,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:37:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:33,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:34,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694882050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:34,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:34,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-16 11:37:34,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783435897] [2022-11-16 11:37:34,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:34,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:37:34,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:34,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:37:34,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:37:34,728 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:37:34,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 333 transitions, 3319 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:34,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:34,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:37:34,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:39,587 INFO L130 PetriNetUnfolder]: 494/1674 cut-off events. [2022-11-16 11:37:39,588 INFO L131 PetriNetUnfolder]: For 10688/10688 co-relation queries the response was YES. [2022-11-16 11:37:39,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8092 conditions, 1674 events. 494/1674 cut-off events. For 10688/10688 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13112 event pairs, 21 based on Foata normal form. 1/1666 useless extension candidates. Maximal degree in co-relation 8027. Up to 414 conditions per place. [2022-11-16 11:37:39,608 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 173 selfloop transitions, 380 changer transitions 6/601 dead transitions. [2022-11-16 11:37:39,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 601 transitions, 7368 flow [2022-11-16 11:37:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-16 11:37:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-11-16 11:37:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3882 transitions. [2022-11-16 11:37:39,615 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6231139646869984 [2022-11-16 11:37:39,615 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3882 transitions. [2022-11-16 11:37:39,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3882 transitions. [2022-11-16 11:37:39,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:39,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3882 transitions. [2022-11-16 11:37:39,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.457142857142856) internal successors, (3882), 70 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:39,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:39,636 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:39,636 INFO L175 Difference]: Start difference. First operand has 321 places, 333 transitions, 3319 flow. Second operand 70 states and 3882 transitions. [2022-11-16 11:37:39,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 601 transitions, 7368 flow [2022-11-16 11:37:39,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 601 transitions, 7000 flow, removed 55 selfloop flow, removed 20 redundant places. [2022-11-16 11:37:39,723 INFO L231 Difference]: Finished difference. Result has 382 places, 526 transitions, 6695 flow [2022-11-16 11:37:39,724 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=6695, PETRI_PLACES=382, PETRI_TRANSITIONS=526} [2022-11-16 11:37:39,724 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 303 predicate places. [2022-11-16 11:37:39,724 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 526 transitions, 6695 flow [2022-11-16 11:37:39,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:39,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:39,725 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] [2022-11-16 11:37:39,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 11:37:39,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:37:39,931 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1266148075, now seen corresponding path program 7 times [2022-11-16 11:37:39,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:39,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151986] [2022-11-16 11:37:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:39,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:40,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:40,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151986] [2022-11-16 11:37:40,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:40,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249557262] [2022-11-16 11:37:40,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:37:40,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:40,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:40,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:40,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:37:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:40,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:37:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:41,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:41,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249557262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:41,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:41,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-16 11:37:41,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766135162] [2022-11-16 11:37:41,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:41,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:37:41,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:41,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:37:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:37:41,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:37:41,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 526 transitions, 6695 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:41,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:41,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:37:41,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:48,445 INFO L130 PetriNetUnfolder]: 675/2316 cut-off events. [2022-11-16 11:37:48,445 INFO L131 PetriNetUnfolder]: For 20366/20366 co-relation queries the response was YES. [2022-11-16 11:37:48,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12621 conditions, 2316 events. 675/2316 cut-off events. For 20366/20366 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20164 event pairs, 21 based on Foata normal form. 2/2309 useless extension candidates. Maximal degree in co-relation 12544. Up to 412 conditions per place. [2022-11-16 11:37:48,479 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 191 selfloop transitions, 585 changer transitions 13/831 dead transitions. [2022-11-16 11:37:48,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 831 transitions, 12073 flow [2022-11-16 11:37:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-16 11:37:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-11-16 11:37:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5261 transitions. [2022-11-16 11:37:48,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6222353636901242 [2022-11-16 11:37:48,488 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5261 transitions. [2022-11-16 11:37:48,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5261 transitions. [2022-11-16 11:37:48,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:48,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5261 transitions. [2022-11-16 11:37:48,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 55.37894736842105) internal successors, (5261), 95 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:48,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 89.0) internal successors, (8544), 96 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:48,579 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 89.0) internal successors, (8544), 96 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:48,580 INFO L175 Difference]: Start difference. First operand has 382 places, 526 transitions, 6695 flow. Second operand 95 states and 5261 transitions. [2022-11-16 11:37:48,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 831 transitions, 12073 flow [2022-11-16 11:37:48,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 831 transitions, 11343 flow, removed 303 selfloop flow, removed 19 redundant places. [2022-11-16 11:37:48,838 INFO L231 Difference]: Finished difference. Result has 475 places, 724 transitions, 10672 flow [2022-11-16 11:37:48,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=6208, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=10672, PETRI_PLACES=475, PETRI_TRANSITIONS=724} [2022-11-16 11:37:48,840 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 396 predicate places. [2022-11-16 11:37:48,840 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 724 transitions, 10672 flow [2022-11-16 11:37:48,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:48,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:48,841 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] [2022-11-16 11:37:48,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:49,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:37:49,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:49,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:49,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1144281925, now seen corresponding path program 8 times [2022-11-16 11:37:49,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:49,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42580975] [2022-11-16 11:37:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:49,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:49,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:49,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42580975] [2022-11-16 11:37:49,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42580975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:49,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71633788] [2022-11-16 11:37:49,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:37:49,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:49,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:49,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:37:49,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:37:49,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:49,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:37:49,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:50,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:50,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71633788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:50,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:50,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-16 11:37:50,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111719870] [2022-11-16 11:37:50,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:37:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:37:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:37:50,787 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:37:50,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 724 transitions, 10672 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:50,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:50,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:37:50,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:54,956 INFO L130 PetriNetUnfolder]: 796/2713 cut-off events. [2022-11-16 11:37:54,957 INFO L131 PetriNetUnfolder]: For 36803/36803 co-relation queries the response was YES. [2022-11-16 11:37:54,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16220 conditions, 2713 events. 796/2713 cut-off events. For 36803/36803 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24550 event pairs, 36 based on Foata normal form. 2/2666 useless extension candidates. Maximal degree in co-relation 16126. Up to 554 conditions per place. [2022-11-16 11:37:55,000 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 312 selfloop transitions, 570 changer transitions 12/936 dead transitions. [2022-11-16 11:37:55,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 936 transitions, 15205 flow [2022-11-16 11:37:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 11:37:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-16 11:37:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3584 transitions. [2022-11-16 11:37:55,006 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6292134831460674 [2022-11-16 11:37:55,006 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3584 transitions. [2022-11-16 11:37:55,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3584 transitions. [2022-11-16 11:37:55,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:55,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3584 transitions. [2022-11-16 11:37:55,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.0) internal successors, (3584), 64 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:55,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:55,022 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:55,023 INFO L175 Difference]: Start difference. First operand has 475 places, 724 transitions, 10672 flow. Second operand 64 states and 3584 transitions. [2022-11-16 11:37:55,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 936 transitions, 15205 flow [2022-11-16 11:37:55,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 936 transitions, 14223 flow, removed 394 selfloop flow, removed 25 redundant places. [2022-11-16 11:37:55,426 INFO L231 Difference]: Finished difference. Result has 515 places, 844 transitions, 13514 flow [2022-11-16 11:37:55,427 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=9989, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=456, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=13514, PETRI_PLACES=515, PETRI_TRANSITIONS=844} [2022-11-16 11:37:55,427 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 436 predicate places. [2022-11-16 11:37:55,427 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 844 transitions, 13514 flow [2022-11-16 11:37:55,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:55,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:55,428 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] [2022-11-16 11:37:55,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 11:37:55,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:37:55,631 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash -156948061, now seen corresponding path program 9 times [2022-11-16 11:37:55,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:55,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836824673] [2022-11-16 11:37:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:55,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:56,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:56,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836824673] [2022-11-16 11:37:56,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836824673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:56,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639589972] [2022-11-16 11:37:56,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:37:56,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:56,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:56,159 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:56,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:37:56,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:37:56,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:56,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:37:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:56,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:57,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639589972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:57,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:57,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-16 11:37:57,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402843882] [2022-11-16 11:37:57,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:57,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:37:57,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:37:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:37:57,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:37:57,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 844 transitions, 13514 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:57,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:57,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:37:57,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:59,715 INFO L130 PetriNetUnfolder]: 798/2978 cut-off events. [2022-11-16 11:37:59,715 INFO L131 PetriNetUnfolder]: For 44193/44198 co-relation queries the response was YES. [2022-11-16 11:37:59,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17973 conditions, 2978 events. 798/2978 cut-off events. For 44193/44198 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28303 event pairs, 64 based on Foata normal form. 5/2964 useless extension candidates. Maximal degree in co-relation 17876. Up to 1060 conditions per place. [2022-11-16 11:37:59,748 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 350 selfloop transitions, 488 changer transitions 6/886 dead transitions. [2022-11-16 11:37:59,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 886 transitions, 15685 flow [2022-11-16 11:37:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:37:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-16 11:37:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2022-11-16 11:37:59,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2022-11-16 11:37:59,752 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2022-11-16 11:37:59,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2022-11-16 11:37:59,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:59,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2022-11-16 11:37:59,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:59,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:59,760 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:59,760 INFO L175 Difference]: Start difference. First operand has 515 places, 844 transitions, 13514 flow. Second operand 32 states and 1783 transitions. [2022-11-16 11:37:59,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 886 transitions, 15685 flow [2022-11-16 11:38:00,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 886 transitions, 15054 flow, removed 95 selfloop flow, removed 31 redundant places. [2022-11-16 11:38:00,236 INFO L231 Difference]: Finished difference. Result has 514 places, 854 transitions, 14563 flow [2022-11-16 11:38:00,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=12913, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14563, PETRI_PLACES=514, PETRI_TRANSITIONS=854} [2022-11-16 11:38:00,237 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 435 predicate places. [2022-11-16 11:38:00,237 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 854 transitions, 14563 flow [2022-11-16 11:38:00,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:00,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:00,238 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] [2022-11-16 11:38:00,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:00,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:38:00,444 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash -937348191, now seen corresponding path program 10 times [2022-11-16 11:38:00,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:00,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900386913] [2022-11-16 11:38:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:00,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:00,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900386913] [2022-11-16 11:38:00,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900386913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:00,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644773791] [2022-11-16 11:38:00,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:38:00,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:00,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:00,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:01,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:38:01,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:38:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:01,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:38:01,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:01,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:02,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644773791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:02,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:02,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-16 11:38:02,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882871848] [2022-11-16 11:38:02,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:02,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:38:02,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:02,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:38:02,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:38:02,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:38:02,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 854 transitions, 14563 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:02,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:02,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:38:02,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:04,264 INFO L130 PetriNetUnfolder]: 798/2956 cut-off events. [2022-11-16 11:38:04,264 INFO L131 PetriNetUnfolder]: For 39263/39275 co-relation queries the response was YES. [2022-11-16 11:38:04,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18137 conditions, 2956 events. 798/2956 cut-off events. For 39263/39275 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27973 event pairs, 94 based on Foata normal form. 4/2936 useless extension candidates. Maximal degree in co-relation 18034. Up to 1071 conditions per place. [2022-11-16 11:38:04,307 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 380 selfloop transitions, 452 changer transitions 6/880 dead transitions. [2022-11-16 11:38:04,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 880 transitions, 16565 flow [2022-11-16 11:38:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:38:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 11:38:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1503 transitions. [2022-11-16 11:38:04,311 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6254681647940075 [2022-11-16 11:38:04,311 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1503 transitions. [2022-11-16 11:38:04,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1503 transitions. [2022-11-16 11:38:04,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:04,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1503 transitions. [2022-11-16 11:38:04,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.666666666666664) internal successors, (1503), 27 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,319 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,320 INFO L175 Difference]: Start difference. First operand has 514 places, 854 transitions, 14563 flow. Second operand 27 states and 1503 transitions. [2022-11-16 11:38:04,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 880 transitions, 16565 flow [2022-11-16 11:38:04,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 880 transitions, 16455 flow, removed 14 selfloop flow, removed 18 redundant places. [2022-11-16 11:38:04,727 INFO L231 Difference]: Finished difference. Result has 523 places, 856 transitions, 15822 flow [2022-11-16 11:38:04,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=14442, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15822, PETRI_PLACES=523, PETRI_TRANSITIONS=856} [2022-11-16 11:38:04,729 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 444 predicate places. [2022-11-16 11:38:04,729 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 856 transitions, 15822 flow [2022-11-16 11:38:04,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:04,730 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] [2022-11-16 11:38:04,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:04,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:38:04,934 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:04,935 INFO L85 PathProgramCache]: Analyzing trace with hash -534739235, now seen corresponding path program 11 times [2022-11-16 11:38:04,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:04,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612836860] [2022-11-16 11:38:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:04,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:05,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:05,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612836860] [2022-11-16 11:38:05,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612836860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:05,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960810656] [2022-11-16 11:38:05,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:38:05,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:05,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:05,422 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:05,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:38:05,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:38:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:38:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:06,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:06,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960810656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:06,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:06,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-16 11:38:06,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795436354] [2022-11-16 11:38:06,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:06,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:38:06,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:06,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:38:06,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:38:06,727 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:38:06,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 856 transitions, 15822 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:06,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:06,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:38:06,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:09,473 INFO L130 PetriNetUnfolder]: 798/2980 cut-off events. [2022-11-16 11:38:09,473 INFO L131 PetriNetUnfolder]: For 43549/43561 co-relation queries the response was YES. [2022-11-16 11:38:09,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19178 conditions, 2980 events. 798/2980 cut-off events. For 43549/43561 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28305 event pairs, 89 based on Foata normal form. 4/2963 useless extension candidates. Maximal degree in co-relation 19073. Up to 1055 conditions per place. [2022-11-16 11:38:09,519 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 367 selfloop transitions, 479 changer transitions 12/900 dead transitions. [2022-11-16 11:38:09,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 900 transitions, 18048 flow [2022-11-16 11:38:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 11:38:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-16 11:38:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2041 transitions. [2022-11-16 11:38:09,524 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6197995748557547 [2022-11-16 11:38:09,524 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2041 transitions. [2022-11-16 11:38:09,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2041 transitions. [2022-11-16 11:38:09,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:09,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2041 transitions. [2022-11-16 11:38:09,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.16216216216216) internal successors, (2041), 37 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:09,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:09,535 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:09,535 INFO L175 Difference]: Start difference. First operand has 523 places, 856 transitions, 15822 flow. Second operand 37 states and 2041 transitions. [2022-11-16 11:38:09,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 900 transitions, 18048 flow [2022-11-16 11:38:10,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 900 transitions, 17659 flow, removed 7 selfloop flow, removed 17 redundant places. [2022-11-16 11:38:10,063 INFO L231 Difference]: Finished difference. Result has 550 places, 869 transitions, 17006 flow [2022-11-16 11:38:10,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=15442, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17006, PETRI_PLACES=550, PETRI_TRANSITIONS=869} [2022-11-16 11:38:10,064 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 471 predicate places. [2022-11-16 11:38:10,064 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 869 transitions, 17006 flow [2022-11-16 11:38:10,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:10,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:10,065 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] [2022-11-16 11:38:10,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 11:38:10,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:38:10,266 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash 564448207, now seen corresponding path program 12 times [2022-11-16 11:38:10,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:10,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18955020] [2022-11-16 11:38:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:10,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:10,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18955020] [2022-11-16 11:38:10,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18955020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:10,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921600881] [2022-11-16 11:38:10,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:38:10,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:10,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:10,747 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:10,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:38:10,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 11:38:10,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:10,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:38:10,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:11,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:12,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921600881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:12,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:12,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-16 11:38:12,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693311301] [2022-11-16 11:38:12,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:12,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:38:12,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:38:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:38:12,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:38:12,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 869 transitions, 17006 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:12,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:12,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:38:12,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:15,047 INFO L130 PetriNetUnfolder]: 800/3082 cut-off events. [2022-11-16 11:38:15,047 INFO L131 PetriNetUnfolder]: For 51435/51460 co-relation queries the response was YES. [2022-11-16 11:38:15,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20297 conditions, 3082 events. 800/3082 cut-off events. For 51435/51460 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29633 event pairs, 115 based on Foata normal form. 5/3080 useless extension candidates. Maximal degree in co-relation 20179. Up to 1236 conditions per place. [2022-11-16 11:38:15,107 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 356 selfloop transitions, 498 changer transitions 6/902 dead transitions. [2022-11-16 11:38:15,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 902 transitions, 19157 flow [2022-11-16 11:38:15,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:38:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-16 11:38:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-11-16 11:38:15,112 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-11-16 11:38:15,112 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-11-16 11:38:15,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-11-16 11:38:15,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:15,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-11-16 11:38:15,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:15,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:15,122 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:15,123 INFO L175 Difference]: Start difference. First operand has 550 places, 869 transitions, 17006 flow. Second operand 33 states and 1827 transitions. [2022-11-16 11:38:15,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 902 transitions, 19157 flow [2022-11-16 11:38:15,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 902 transitions, 18698 flow, removed 36 selfloop flow, removed 21 redundant places. [2022-11-16 11:38:15,537 INFO L231 Difference]: Finished difference. Result has 561 places, 877 transitions, 17841 flow [2022-11-16 11:38:15,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=16560, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17841, PETRI_PLACES=561, PETRI_TRANSITIONS=877} [2022-11-16 11:38:15,539 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 482 predicate places. [2022-11-16 11:38:15,539 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 877 transitions, 17841 flow [2022-11-16 11:38:15,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:15,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:15,539 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] [2022-11-16 11:38:15,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:15,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:15,740 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2042456693, now seen corresponding path program 13 times [2022-11-16 11:38:15,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:15,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604970131] [2022-11-16 11:38:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:15,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:16,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:16,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604970131] [2022-11-16 11:38:16,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604970131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:16,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460339816] [2022-11-16 11:38:16,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:38:16,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:16,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:16,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:16,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:38:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:16,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:38:16,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:16,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:17,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460339816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:17,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:17,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-16 11:38:17,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362688718] [2022-11-16 11:38:17,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:38:17,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:38:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:38:17,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:38:17,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 877 transitions, 17841 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:17,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:17,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:38:17,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:20,053 INFO L130 PetriNetUnfolder]: 800/3025 cut-off events. [2022-11-16 11:38:20,053 INFO L131 PetriNetUnfolder]: For 54385/54397 co-relation queries the response was YES. [2022-11-16 11:38:20,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20825 conditions, 3025 events. 800/3025 cut-off events. For 54385/54397 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28931 event pairs, 94 based on Foata normal form. 4/3007 useless extension candidates. Maximal degree in co-relation 20706. Up to 1066 conditions per place. [2022-11-16 11:38:20,092 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 390 selfloop transitions, 473 changer transitions 12/917 dead transitions. [2022-11-16 11:38:20,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 917 transitions, 20091 flow [2022-11-16 11:38:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:38:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-16 11:38:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1820 transitions. [2022-11-16 11:38:20,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6196799455226422 [2022-11-16 11:38:20,095 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1820 transitions. [2022-11-16 11:38:20,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1820 transitions. [2022-11-16 11:38:20,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:20,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1820 transitions. [2022-11-16 11:38:20,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.15151515151515) internal successors, (1820), 33 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:20,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:20,104 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:20,104 INFO L175 Difference]: Start difference. First operand has 561 places, 877 transitions, 17841 flow. Second operand 33 states and 1820 transitions. [2022-11-16 11:38:20,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 917 transitions, 20091 flow [2022-11-16 11:38:20,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 917 transitions, 19921 flow, removed 23 selfloop flow, removed 20 redundant places. [2022-11-16 11:38:20,676 INFO L231 Difference]: Finished difference. Result has 583 places, 887 transitions, 19235 flow [2022-11-16 11:38:20,678 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=17677, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=19235, PETRI_PLACES=583, PETRI_TRANSITIONS=887} [2022-11-16 11:38:20,678 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 504 predicate places. [2022-11-16 11:38:20,678 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 887 transitions, 19235 flow [2022-11-16 11:38:20,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:20,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:20,679 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] [2022-11-16 11:38:20,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:20,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:20,885 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:20,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:20,885 INFO L85 PathProgramCache]: Analyzing trace with hash -280113973, now seen corresponding path program 14 times [2022-11-16 11:38:20,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:20,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024505046] [2022-11-16 11:38:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:20,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:21,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:21,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024505046] [2022-11-16 11:38:21,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024505046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:21,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093222802] [2022-11-16 11:38:21,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:38:21,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:21,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:21,501 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:21,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:38:21,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:38:21,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:21,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:38:21,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:22,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:23,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093222802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:23,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:23,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-16 11:38:23,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707330531] [2022-11-16 11:38:23,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:23,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:38:23,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:23,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:38:23,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:38:23,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:38:23,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 887 transitions, 19235 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:23,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:23,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:38:23,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:29,774 INFO L130 PetriNetUnfolder]: 860/3281 cut-off events. [2022-11-16 11:38:29,774 INFO L131 PetriNetUnfolder]: For 67162/67187 co-relation queries the response was YES. [2022-11-16 11:38:29,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23672 conditions, 3281 events. 860/3281 cut-off events. For 67162/67187 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32095 event pairs, 90 based on Foata normal form. 6/3275 useless extension candidates. Maximal degree in co-relation 23543. Up to 930 conditions per place. [2022-11-16 11:38:29,815 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 290 selfloop transitions, 717 changer transitions 12/1061 dead transitions. [2022-11-16 11:38:29,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 1061 transitions, 24357 flow [2022-11-16 11:38:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-16 11:38:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-11-16 11:38:29,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4796 transitions. [2022-11-16 11:38:29,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6193981660854966 [2022-11-16 11:38:29,821 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4796 transitions. [2022-11-16 11:38:29,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4796 transitions. [2022-11-16 11:38:29,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:29,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4796 transitions. [2022-11-16 11:38:29,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 55.12643678160919) internal successors, (4796), 87 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:29,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 89.0) internal successors, (7832), 88 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:29,839 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 89.0) internal successors, (7832), 88 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:29,839 INFO L175 Difference]: Start difference. First operand has 583 places, 887 transitions, 19235 flow. Second operand 87 states and 4796 transitions. [2022-11-16 11:38:29,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 1061 transitions, 24357 flow [2022-11-16 11:38:30,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 1061 transitions, 23811 flow, removed 52 selfloop flow, removed 20 redundant places. [2022-11-16 11:38:30,377 INFO L231 Difference]: Finished difference. Result has 663 places, 991 transitions, 23429 flow [2022-11-16 11:38:30,377 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=18739, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=23429, PETRI_PLACES=663, PETRI_TRANSITIONS=991} [2022-11-16 11:38:30,378 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 584 predicate places. [2022-11-16 11:38:30,378 INFO L495 AbstractCegarLoop]: Abstraction has has 663 places, 991 transitions, 23429 flow [2022-11-16 11:38:30,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:30,378 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:30,378 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] [2022-11-16 11:38:30,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:30,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:38:30,579 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash 194159815, now seen corresponding path program 15 times [2022-11-16 11:38:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111835348] [2022-11-16 11:38:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:30,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:31,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111835348] [2022-11-16 11:38:31,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111835348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916333997] [2022-11-16 11:38:31,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:38:31,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:31,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:31,172 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:31,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:38:31,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:38:31,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:31,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:38:31,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:31,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:32,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916333997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:32,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:32,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-16 11:38:32,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311840663] [2022-11-16 11:38:32,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:32,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:38:32,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:38:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:38:32,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:38:32,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 991 transitions, 23429 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:32,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:32,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:38:32,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:38,141 INFO L130 PetriNetUnfolder]: 1090/3896 cut-off events. [2022-11-16 11:38:38,141 INFO L131 PetriNetUnfolder]: For 102958/102989 co-relation queries the response was YES. [2022-11-16 11:38:38,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30505 conditions, 3896 events. 1090/3896 cut-off events. For 102958/102989 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38667 event pairs, 109 based on Foata normal form. 4/3891 useless extension candidates. Maximal degree in co-relation 30362. Up to 951 conditions per place. [2022-11-16 11:38:38,219 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 414 selfloop transitions, 829 changer transitions 6/1291 dead transitions. [2022-11-16 11:38:38,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1291 transitions, 31552 flow [2022-11-16 11:38:38,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 11:38:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-16 11:38:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3650 transitions. [2022-11-16 11:38:38,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6309420916162489 [2022-11-16 11:38:38,226 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3650 transitions. [2022-11-16 11:38:38,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3650 transitions. [2022-11-16 11:38:38,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:38,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3650 transitions. [2022-11-16 11:38:38,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 56.15384615384615) internal successors, (3650), 65 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:38,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 89.0) internal successors, (5874), 66 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:38,243 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 89.0) internal successors, (5874), 66 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:38,243 INFO L175 Difference]: Start difference. First operand has 663 places, 991 transitions, 23429 flow. Second operand 65 states and 3650 transitions. [2022-11-16 11:38:38,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1291 transitions, 31552 flow [2022-11-16 11:38:39,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 1291 transitions, 30456 flow, removed 375 selfloop flow, removed 31 redundant places. [2022-11-16 11:38:39,385 INFO L231 Difference]: Finished difference. Result has 703 places, 1196 transitions, 29447 flow [2022-11-16 11:38:39,387 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=22495, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=29447, PETRI_PLACES=703, PETRI_TRANSITIONS=1196} [2022-11-16 11:38:39,387 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 624 predicate places. [2022-11-16 11:38:39,387 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 1196 transitions, 29447 flow [2022-11-16 11:38:39,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:39,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:39,388 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] [2022-11-16 11:38:39,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:39,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 11:38:39,595 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:39,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1355653055, now seen corresponding path program 16 times [2022-11-16 11:38:39,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:39,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207313182] [2022-11-16 11:38:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:39,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:40,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:40,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207313182] [2022-11-16 11:38:40,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207313182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:40,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819119980] [2022-11-16 11:38:40,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:38:40,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:40,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:40,067 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:40,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:38:40,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:38:40,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:40,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:38:40,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:40,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:41,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819119980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:41,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:41,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-16 11:38:41,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851470849] [2022-11-16 11:38:41,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:41,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:38:41,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:41,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:38:41,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:38:41,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:38:41,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 1196 transitions, 29447 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:41,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:41,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:38:41,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:50,420 INFO L130 PetriNetUnfolder]: 1130/4033 cut-off events. [2022-11-16 11:38:50,421 INFO L131 PetriNetUnfolder]: For 117345/117393 co-relation queries the response was YES. [2022-11-16 11:38:50,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32920 conditions, 4033 events. 1130/4033 cut-off events. For 117345/117393 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40269 event pairs, 82 based on Foata normal form. 9/4032 useless extension candidates. Maximal degree in co-relation 32773. Up to 1060 conditions per place. [2022-11-16 11:38:50,490 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 362 selfloop transitions, 917 changer transitions 12/1333 dead transitions. [2022-11-16 11:38:50,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 1333 transitions, 34320 flow [2022-11-16 11:38:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-16 11:38:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2022-11-16 11:38:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 5536 transitions. [2022-11-16 11:38:50,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6220224719101124 [2022-11-16 11:38:50,498 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 5536 transitions. [2022-11-16 11:38:50,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 5536 transitions. [2022-11-16 11:38:50,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:50,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 5536 transitions. [2022-11-16 11:38:50,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 55.36) internal successors, (5536), 100 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:50,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 89.0) internal successors, (8989), 101 states have internal predecessors, (8989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:50,517 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 89.0) internal successors, (8989), 101 states have internal predecessors, (8989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:50,517 INFO L175 Difference]: Start difference. First operand has 703 places, 1196 transitions, 29447 flow. Second operand 100 states and 5536 transitions. [2022-11-16 11:38:50,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 1333 transitions, 34320 flow [2022-11-16 11:38:51,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1333 transitions, 33364 flow, removed 248 selfloop flow, removed 26 redundant places. [2022-11-16 11:38:51,849 INFO L231 Difference]: Finished difference. Result has 780 places, 1244 transitions, 32073 flow [2022-11-16 11:38:51,850 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=28600, PETRI_DIFFERENCE_MINUEND_PLACES=671, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=32073, PETRI_PLACES=780, PETRI_TRANSITIONS=1244} [2022-11-16 11:38:51,850 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 701 predicate places. [2022-11-16 11:38:51,851 INFO L495 AbstractCegarLoop]: Abstraction has has 780 places, 1244 transitions, 32073 flow [2022-11-16 11:38:51,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:51,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:51,852 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:51,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-16 11:38:52,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:52,057 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:52,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1191976297, now seen corresponding path program 17 times [2022-11-16 11:38:52,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:52,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677998245] [2022-11-16 11:38:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:52,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:52,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:52,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677998245] [2022-11-16 11:38:52,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677998245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:52,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502195212] [2022-11-16 11:38:52,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:38:52,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:52,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:52,575 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:52,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:38:52,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:38:52,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:52,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:38:52,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:53,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:54,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502195212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:54,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:54,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-16 11:38:54,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919574403] [2022-11-16 11:38:54,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:54,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:38:54,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:54,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:38:54,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:38:54,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:38:54,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 1244 transitions, 32073 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:54,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:54,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:38:54,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:39:03,019 INFO L130 PetriNetUnfolder]: 1382/4801 cut-off events. [2022-11-16 11:39:03,019 INFO L131 PetriNetUnfolder]: For 173835/173858 co-relation queries the response was YES. [2022-11-16 11:39:03,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42496 conditions, 4801 events. 1382/4801 cut-off events. For 173835/173858 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 48637 event pairs, 71 based on Foata normal form. 29/4812 useless extension candidates. Maximal degree in co-relation 42343. Up to 687 conditions per place. [2022-11-16 11:39:03,127 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 583 selfloop transitions, 1005 changer transitions 19/1649 dead transitions. [2022-11-16 11:39:03,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 1649 transitions, 45609 flow [2022-11-16 11:39:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-16 11:39:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-11-16 11:39:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 5293 transitions. [2022-11-16 11:39:03,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6326798948123357 [2022-11-16 11:39:03,134 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 5293 transitions. [2022-11-16 11:39:03,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 5293 transitions. [2022-11-16 11:39:03,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:39:03,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 5293 transitions. [2022-11-16 11:39:03,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 56.308510638297875) internal successors, (5293), 94 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:03,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 89.0) internal successors, (8455), 95 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:03,152 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 89.0) internal successors, (8455), 95 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:03,152 INFO L175 Difference]: Start difference. First operand has 780 places, 1244 transitions, 32073 flow. Second operand 94 states and 5293 transitions. [2022-11-16 11:39:03,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 1649 transitions, 45609 flow [2022-11-16 11:39:04,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 1649 transitions, 44503 flow, removed 208 selfloop flow, removed 54 redundant places. [2022-11-16 11:39:04,730 INFO L231 Difference]: Finished difference. Result has 846 places, 1455 transitions, 40746 flow [2022-11-16 11:39:04,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=31231, PETRI_DIFFERENCE_MINUEND_PLACES=717, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=817, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=40746, PETRI_PLACES=846, PETRI_TRANSITIONS=1455} [2022-11-16 11:39:04,732 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 767 predicate places. [2022-11-16 11:39:04,732 INFO L495 AbstractCegarLoop]: Abstraction has has 846 places, 1455 transitions, 40746 flow [2022-11-16 11:39:04,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:04,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:39:04,733 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:04,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:39:04,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:04,938 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:39:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1756563129, now seen corresponding path program 18 times [2022-11-16 11:39:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:39:04,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118009244] [2022-11-16 11:39:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:04,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:39:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:05,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:39:05,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118009244] [2022-11-16 11:39:05,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118009244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:39:05,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780652892] [2022-11-16 11:39:05,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:39:05,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:05,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:39:05,472 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:39:05,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:39:05,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:39:05,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:39:05,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:39:05,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:06,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:07,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780652892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:07,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:39:07,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-11-16 11:39:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224430300] [2022-11-16 11:39:07,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:07,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 11:39:07,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 11:39:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:39:07,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:39:07,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 1455 transitions, 40746 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:07,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:39:07,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:39:07,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:39:19,936 INFO L130 PetriNetUnfolder]: 1658/5703 cut-off events. [2022-11-16 11:39:19,936 INFO L131 PetriNetUnfolder]: For 315524/315539 co-relation queries the response was YES. [2022-11-16 11:39:20,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57546 conditions, 5703 events. 1658/5703 cut-off events. For 315524/315539 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 59417 event pairs, 87 based on Foata normal form. 12/5695 useless extension candidates. Maximal degree in co-relation 57364. Up to 832 conditions per place. [2022-11-16 11:39:20,075 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 530 selfloop transitions, 1367 changer transitions 12/1951 dead transitions. [2022-11-16 11:39:20,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 1951 transitions, 59308 flow [2022-11-16 11:39:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-11-16 11:39:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2022-11-16 11:39:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 7781 transitions. [2022-11-16 11:39:20,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.624478330658106 [2022-11-16 11:39:20,083 INFO L72 ComplementDD]: Start complementDD. Operand 140 states and 7781 transitions. [2022-11-16 11:39:20,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 140 states and 7781 transitions. [2022-11-16 11:39:20,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:39:20,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 140 states and 7781 transitions. [2022-11-16 11:39:20,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 141 states, 140 states have (on average 55.57857142857143) internal successors, (7781), 140 states have internal predecessors, (7781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:20,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:20,111 INFO L81 ComplementDD]: Finished complementDD. Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:20,111 INFO L175 Difference]: Start difference. First operand has 846 places, 1455 transitions, 40746 flow. Second operand 140 states and 7781 transitions. [2022-11-16 11:39:20,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 1951 transitions, 59308 flow [2022-11-16 11:39:23,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 932 places, 1951 transitions, 57201 flow, removed 604 selfloop flow, removed 46 redundant places. [2022-11-16 11:39:23,220 INFO L231 Difference]: Finished difference. Result has 960 places, 1762 transitions, 52497 flow [2022-11-16 11:39:23,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=38987, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=140, PETRI_FLOW=52497, PETRI_PLACES=960, PETRI_TRANSITIONS=1762} [2022-11-16 11:39:23,222 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 881 predicate places. [2022-11-16 11:39:23,222 INFO L495 AbstractCegarLoop]: Abstraction has has 960 places, 1762 transitions, 52497 flow [2022-11-16 11:39:23,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:23,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:39:23,223 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:23,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:39:23,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:39:23,424 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:39:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1450801589, now seen corresponding path program 19 times [2022-11-16 11:39:23,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:39:23,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958486877] [2022-11-16 11:39:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:23,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:39:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:23,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:39:23,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958486877] [2022-11-16 11:39:23,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958486877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:39:23,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575123868] [2022-11-16 11:39:23,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:39:23,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:23,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:39:23,893 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:39:23,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:39:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:23,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:39:23,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:24,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:25,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575123868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:25,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:39:25,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-16 11:39:25,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954061813] [2022-11-16 11:39:25,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:25,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:39:25,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:25,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:39:25,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:39:25,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:39:25,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 960 places, 1762 transitions, 52497 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:25,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:39:25,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:39:25,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:39:53,807 INFO L130 PetriNetUnfolder]: 1852/6369 cut-off events. [2022-11-16 11:39:53,807 INFO L131 PetriNetUnfolder]: For 393240/393263 co-relation queries the response was YES. [2022-11-16 11:39:53,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66310 conditions, 6369 events. 1852/6369 cut-off events. For 393240/393263 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 67654 event pairs, 73 based on Foata normal form. 14/6368 useless extension candidates. Maximal degree in co-relation 66115. Up to 930 conditions per place. [2022-11-16 11:39:53,956 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 498 selfloop transitions, 1728 changer transitions 13/2281 dead transitions. [2022-11-16 11:39:53,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1195 places, 2281 transitions, 70137 flow [2022-11-16 11:39:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-11-16 11:39:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2022-11-16 11:39:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 13425 transitions. [2022-11-16 11:39:53,965 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6233169282198904 [2022-11-16 11:39:53,965 INFO L72 ComplementDD]: Start complementDD. Operand 242 states and 13425 transitions. [2022-11-16 11:39:53,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 242 states and 13425 transitions. [2022-11-16 11:39:53,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:39:53,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 242 states and 13425 transitions. [2022-11-16 11:39:53,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 243 states, 242 states have (on average 55.47520661157025) internal successors, (13425), 242 states have internal predecessors, (13425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:53,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 243 states, 243 states have (on average 89.0) internal successors, (21627), 243 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:53,999 INFO L81 ComplementDD]: Finished complementDD. Result has 243 states, 243 states have (on average 89.0) internal successors, (21627), 243 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:54,000 INFO L175 Difference]: Start difference. First operand has 960 places, 1762 transitions, 52497 flow. Second operand 242 states and 13425 transitions. [2022-11-16 11:39:54,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1195 places, 2281 transitions, 70137 flow [2022-11-16 11:39:57,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1166 places, 2281 transitions, 68446 flow, removed 731 selfloop flow, removed 29 redundant places. [2022-11-16 11:39:57,844 INFO L231 Difference]: Finished difference. Result has 1202 places, 2017 transitions, 63477 flow [2022-11-16 11:39:57,846 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=51191, PETRI_DIFFERENCE_MINUEND_PLACES=925, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=242, PETRI_FLOW=63477, PETRI_PLACES=1202, PETRI_TRANSITIONS=2017} [2022-11-16 11:39:57,848 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1123 predicate places. [2022-11-16 11:39:57,848 INFO L495 AbstractCegarLoop]: Abstraction has has 1202 places, 2017 transitions, 63477 flow [2022-11-16 11:39:57,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:57,849 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:39:57,849 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] [2022-11-16 11:39:57,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 11:39:58,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:58,055 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:39:58,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:58,055 INFO L85 PathProgramCache]: Analyzing trace with hash -577478975, now seen corresponding path program 1 times [2022-11-16 11:39:58,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:39:58,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159581007] [2022-11-16 11:39:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:58,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:39:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:58,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:39:58,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159581007] [2022-11-16 11:39:58,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159581007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:39:58,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628731001] [2022-11-16 11:39:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:58,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:58,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:39:58,436 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:39:58,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:39:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:58,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:39:58,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:58,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:59,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628731001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:59,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:39:59,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-11-16 11:39:59,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700632612] [2022-11-16 11:39:59,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:59,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:39:59,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:59,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:39:59,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:39:59,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-16 11:39:59,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1202 places, 2017 transitions, 63477 flow. Second operand has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:59,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:39:59,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-16 11:39:59,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:40:07,562 INFO L130 PetriNetUnfolder]: 2069/6726 cut-off events. [2022-11-16 11:40:07,562 INFO L131 PetriNetUnfolder]: For 486783/486798 co-relation queries the response was YES. [2022-11-16 11:40:07,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73868 conditions, 6726 events. 2069/6726 cut-off events. For 486783/486798 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70576 event pairs, 295 based on Foata normal form. 12/6707 useless extension candidates. Maximal degree in co-relation 73647. Up to 1859 conditions per place. [2022-11-16 11:40:07,758 INFO L137 encePairwiseOnDemand]: 71/89 looper letters, 871 selfloop transitions, 1181 changer transitions 27/2120 dead transitions. [2022-11-16 11:40:07,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1249 places, 2120 transitions, 69637 flow [2022-11-16 11:40:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-16 11:40:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-16 11:40:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3004 transitions. [2022-11-16 11:40:07,760 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6250520183104453 [2022-11-16 11:40:07,760 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3004 transitions. [2022-11-16 11:40:07,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3004 transitions. [2022-11-16 11:40:07,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:40:07,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3004 transitions. [2022-11-16 11:40:07,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.629629629629626) internal successors, (3004), 54 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:07,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:07,765 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:07,765 INFO L175 Difference]: Start difference. First operand has 1202 places, 2017 transitions, 63477 flow. Second operand 54 states and 3004 transitions. [2022-11-16 11:40:07,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1249 places, 2120 transitions, 69637 flow [2022-11-16 11:40:12,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1138 places, 2120 transitions, 67170 flow, removed 612 selfloop flow, removed 111 redundant places. [2022-11-16 11:40:12,750 INFO L231 Difference]: Finished difference. Result has 1152 places, 2018 transitions, 63566 flow [2022-11-16 11:40:12,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=61046, PETRI_DIFFERENCE_MINUEND_PLACES=1085, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=63566, PETRI_PLACES=1152, PETRI_TRANSITIONS=2018} [2022-11-16 11:40:12,752 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1073 predicate places. [2022-11-16 11:40:12,753 INFO L495 AbstractCegarLoop]: Abstraction has has 1152 places, 2018 transitions, 63566 flow [2022-11-16 11:40:12,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:12,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:40:12,753 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:12,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:12,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:40:12,965 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:40:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:12,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1832449457, now seen corresponding path program 20 times [2022-11-16 11:40:12,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:12,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106460794] [2022-11-16 11:40:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:12,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:13,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106460794] [2022-11-16 11:40:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106460794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250510783] [2022-11-16 11:40:13,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:40:13,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:13,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:13,416 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:13,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:40:13,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:40:13,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:13,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:40:13,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:14,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:15,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250510783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:15,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:40:15,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-16 11:40:15,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800798271] [2022-11-16 11:40:15,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:15,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:40:15,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:40:15,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:40:15,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:40:15,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:40:15,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1152 places, 2018 transitions, 63566 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:15,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:40:15,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:40:15,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:40:27,180 INFO L130 PetriNetUnfolder]: 1893/6407 cut-off events. [2022-11-16 11:40:27,180 INFO L131 PetriNetUnfolder]: For 512729/512744 co-relation queries the response was YES. [2022-11-16 11:40:27,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74092 conditions, 6407 events. 1893/6407 cut-off events. For 512729/512744 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 67633 event pairs, 113 based on Foata normal form. 12/6391 useless extension candidates. Maximal degree in co-relation 73873. Up to 1086 conditions per place. [2022-11-16 11:40:27,336 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 660 selfloop transitions, 1480 changer transitions 12/2195 dead transitions. [2022-11-16 11:40:27,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1241 places, 2195 transitions, 73529 flow [2022-11-16 11:40:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-16 11:40:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-11-16 11:40:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2022-11-16 11:40:27,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2022-11-16 11:40:27,342 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2022-11-16 11:40:27,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2022-11-16 11:40:27,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:40:27,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2022-11-16 11:40:27,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 55.41121495327103) internal successors, (5929), 107 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:27,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:27,357 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:27,357 INFO L175 Difference]: Start difference. First operand has 1152 places, 2018 transitions, 63566 flow. Second operand 107 states and 5929 transitions. [2022-11-16 11:40:27,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1241 places, 2195 transitions, 73529 flow [2022-11-16 11:40:32,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1215 places, 2195 transitions, 72738 flow, removed 87 selfloop flow, removed 26 redundant places. [2022-11-16 11:40:32,147 INFO L231 Difference]: Finished difference. Result has 1229 places, 2090 transitions, 69440 flow [2022-11-16 11:40:32,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=62902, PETRI_DIFFERENCE_MINUEND_PLACES=1109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=69440, PETRI_PLACES=1229, PETRI_TRANSITIONS=2090} [2022-11-16 11:40:32,148 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1150 predicate places. [2022-11-16 11:40:32,148 INFO L495 AbstractCegarLoop]: Abstraction has has 1229 places, 2090 transitions, 69440 flow [2022-11-16 11:40:32,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:32,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:40:32,149 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:32,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 11:40:32,355 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:40:32,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1209061875, now seen corresponding path program 21 times [2022-11-16 11:40:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:32,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993223699] [2022-11-16 11:40:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:32,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:32,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993223699] [2022-11-16 11:40:32,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993223699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:32,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925489189] [2022-11-16 11:40:32,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:40:32,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:32,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:32,820 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:32,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:40:32,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:40:32,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:32,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:40:32,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:33,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:34,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925489189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:34,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:40:34,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-16 11:40:34,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664741494] [2022-11-16 11:40:34,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:34,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:40:34,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:40:34,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:40:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:40:34,579 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:40:34,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1229 places, 2090 transitions, 69440 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:34,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:40:34,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:40:34,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:40:54,857 INFO L130 PetriNetUnfolder]: 2274/7565 cut-off events. [2022-11-16 11:40:54,857 INFO L131 PetriNetUnfolder]: For 663924/663947 co-relation queries the response was YES. [2022-11-16 11:40:54,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92849 conditions, 7565 events. 2274/7565 cut-off events. For 663924/663947 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 81799 event pairs, 97 based on Foata normal form. 14/7570 useless extension candidates. Maximal degree in co-relation 92625. Up to 1128 conditions per place. [2022-11-16 11:40:55,026 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 647 selfloop transitions, 2012 changer transitions 12/2714 dead transitions. [2022-11-16 11:40:55,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1388 places, 2714 transitions, 96896 flow [2022-11-16 11:40:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-16 11:40:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2022-11-16 11:40:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 9368 transitions. [2022-11-16 11:40:55,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6265382557517389 [2022-11-16 11:40:55,034 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 9368 transitions. [2022-11-16 11:40:55,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 9368 transitions. [2022-11-16 11:40:55,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:40:55,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 9368 transitions. [2022-11-16 11:40:55,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 169 states, 168 states have (on average 55.76190476190476) internal successors, (9368), 168 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:55,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:55,054 INFO L81 ComplementDD]: Finished complementDD. Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:55,054 INFO L175 Difference]: Start difference. First operand has 1229 places, 2090 transitions, 69440 flow. Second operand 168 states and 9368 transitions. [2022-11-16 11:40:55,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1388 places, 2714 transitions, 96896 flow [2022-11-16 11:41:02,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1329 places, 2714 transitions, 95311 flow, removed 143 selfloop flow, removed 59 redundant places. [2022-11-16 11:41:02,206 INFO L231 Difference]: Finished difference. Result has 1361 places, 2482 transitions, 88942 flow [2022-11-16 11:41:02,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=68207, PETRI_DIFFERENCE_MINUEND_PLACES=1162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=168, PETRI_FLOW=88942, PETRI_PLACES=1361, PETRI_TRANSITIONS=2482} [2022-11-16 11:41:02,209 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1282 predicate places. [2022-11-16 11:41:02,209 INFO L495 AbstractCegarLoop]: Abstraction has has 1361 places, 2482 transitions, 88942 flow [2022-11-16 11:41:02,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:02,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:41:02,210 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] [2022-11-16 11:41:02,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:02,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:41:02,417 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:41:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2008610497, now seen corresponding path program 2 times [2022-11-16 11:41:02,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:02,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819130992] [2022-11-16 11:41:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:02,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:02,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819130992] [2022-11-16 11:41:02,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819130992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:02,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083230752] [2022-11-16 11:41:02,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:41:02,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:02,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:02,839 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:02,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:41:02,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:41:02,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:41:02,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:03,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:03,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083230752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:03,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:41:03,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-11-16 11:41:03,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448695646] [2022-11-16 11:41:03,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:03,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:41:03,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:41:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:41:03,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-16 11:41:03,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1361 places, 2482 transitions, 88942 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:03,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:41:03,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-16 11:41:03,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:41:18,645 INFO L130 PetriNetUnfolder]: 2627/8394 cut-off events. [2022-11-16 11:41:18,646 INFO L131 PetriNetUnfolder]: For 815343/815366 co-relation queries the response was YES. [2022-11-16 11:41:18,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106566 conditions, 8394 events. 2627/8394 cut-off events. For 815343/815366 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 91151 event pairs, 418 based on Foata normal form. 17/8374 useless extension candidates. Maximal degree in co-relation 106317. Up to 2548 conditions per place. [2022-11-16 11:41:19,034 INFO L137 encePairwiseOnDemand]: 70/89 looper letters, 984 selfloop transitions, 1640 changer transitions 32/2697 dead transitions. [2022-11-16 11:41:19,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1436 places, 2697 transitions, 101161 flow [2022-11-16 11:41:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-16 11:41:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-11-16 11:41:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4518 transitions. [2022-11-16 11:41:19,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.619073718827076 [2022-11-16 11:41:19,041 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4518 transitions. [2022-11-16 11:41:19,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4518 transitions. [2022-11-16 11:41:19,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:41:19,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4518 transitions. [2022-11-16 11:41:19,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 55.09756097560975) internal successors, (4518), 82 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:19,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:19,063 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:19,063 INFO L175 Difference]: Start difference. First operand has 1361 places, 2482 transitions, 88942 flow. Second operand 82 states and 4518 transitions. [2022-11-16 11:41:19,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1436 places, 2697 transitions, 101161 flow [2022-11-16 11:41:29,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1386 places, 2697 transitions, 98447 flow, removed 614 selfloop flow, removed 50 redundant places. [2022-11-16 11:41:29,239 INFO L231 Difference]: Finished difference. Result has 1405 places, 2570 transitions, 93940 flow [2022-11-16 11:41:29,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=86362, PETRI_DIFFERENCE_MINUEND_PLACES=1305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=93940, PETRI_PLACES=1405, PETRI_TRANSITIONS=2570} [2022-11-16 11:41:29,241 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1326 predicate places. [2022-11-16 11:41:29,241 INFO L495 AbstractCegarLoop]: Abstraction has has 1405 places, 2570 transitions, 93940 flow [2022-11-16 11:41:29,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:29,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:41:29,242 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:29,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:29,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:29,443 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:41:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:29,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1087887845, now seen corresponding path program 22 times [2022-11-16 11:41:29,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:29,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092518126] [2022-11-16 11:41:29,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:29,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:29,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092518126] [2022-11-16 11:41:29,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092518126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:29,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447974440] [2022-11-16 11:41:29,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:41:29,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:29,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:29,999 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:30,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:41:30,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:41:30,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:30,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:41:30,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:30,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:31,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447974440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:31,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:41:31,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-11-16 11:41:31,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054905364] [2022-11-16 11:41:31,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:31,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 11:41:31,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:31,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 11:41:31,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:41:31,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:41:31,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1405 places, 2570 transitions, 93940 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:31,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:41:31,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:41:31,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:41:59,802 INFO L130 PetriNetUnfolder]: 2414/8071 cut-off events. [2022-11-16 11:41:59,803 INFO L131 PetriNetUnfolder]: For 843819/843842 co-relation queries the response was YES. [2022-11-16 11:42:00,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107220 conditions, 8071 events. 2414/8071 cut-off events. For 843819/843842 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 88489 event pairs, 62 based on Foata normal form. 14/8076 useless extension candidates. Maximal degree in co-relation 106960. Up to 1151 conditions per place. [2022-11-16 11:42:00,086 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 529 selfloop transitions, 2344 changer transitions 12/2929 dead transitions. [2022-11-16 11:42:00,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1605 places, 2929 transitions, 111641 flow [2022-11-16 11:42:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-11-16 11:42:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2022-11-16 11:42:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 12002 transitions. [2022-11-16 11:42:00,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6243237619642114 [2022-11-16 11:42:00,095 INFO L72 ComplementDD]: Start complementDD. Operand 216 states and 12002 transitions. [2022-11-16 11:42:00,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 216 states and 12002 transitions. [2022-11-16 11:42:00,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:42:00,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 216 states and 12002 transitions. [2022-11-16 11:42:00,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 217 states, 216 states have (on average 55.56481481481482) internal successors, (12002), 216 states have internal predecessors, (12002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:00,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 217 states, 217 states have (on average 89.0) internal successors, (19313), 217 states have internal predecessors, (19313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:00,136 INFO L81 ComplementDD]: Finished complementDD. Result has 217 states, 217 states have (on average 89.0) internal successors, (19313), 217 states have internal predecessors, (19313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:00,137 INFO L175 Difference]: Start difference. First operand has 1405 places, 2570 transitions, 93940 flow. Second operand 216 states and 12002 transitions. [2022-11-16 11:42:00,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1605 places, 2929 transitions, 111641 flow [2022-11-16 11:42:09,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1554 places, 2929 transitions, 108735 flow, removed 277 selfloop flow, removed 51 redundant places. [2022-11-16 11:42:10,016 INFO L231 Difference]: Finished difference. Result has 1577 places, 2694 transitions, 102019 flow [2022-11-16 11:42:10,018 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=91538, PETRI_DIFFERENCE_MINUEND_PLACES=1339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=216, PETRI_FLOW=102019, PETRI_PLACES=1577, PETRI_TRANSITIONS=2694} [2022-11-16 11:42:10,018 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1498 predicate places. [2022-11-16 11:42:10,019 INFO L495 AbstractCegarLoop]: Abstraction has has 1577 places, 2694 transitions, 102019 flow [2022-11-16 11:42:10,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:10,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:42:10,019 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:10,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:10,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 11:42:10,220 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:42:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:10,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1395740355, now seen corresponding path program 23 times [2022-11-16 11:42:10,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:10,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571098927] [2022-11-16 11:42:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:10,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:10,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:10,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571098927] [2022-11-16 11:42:10,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571098927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:10,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315617249] [2022-11-16 11:42:10,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:42:10,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:10,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:10,690 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:10,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:42:10,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:42:10,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:42:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:42:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:11,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:12,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315617249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:12,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:12,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-16 11:42:12,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078778103] [2022-11-16 11:42:12,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:12,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:42:12,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:12,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:42:12,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:42:12,571 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-16 11:42:12,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1577 places, 2694 transitions, 102019 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:12,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:42:12,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-16 11:42:12,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:42:30,983 INFO L130 PetriNetUnfolder]: 2458/8206 cut-off events. [2022-11-16 11:42:30,983 INFO L131 PetriNetUnfolder]: For 881716/881739 co-relation queries the response was YES. [2022-11-16 11:42:31,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111471 conditions, 8206 events. 2458/8206 cut-off events. For 881716/881739 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 90264 event pairs, 181 based on Foata normal form. 14/8179 useless extension candidates. Maximal degree in co-relation 111202. Up to 1494 conditions per place. [2022-11-16 11:42:31,261 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 814 selfloop transitions, 2008 changer transitions 12/2878 dead transitions. [2022-11-16 11:42:31,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1692 places, 2878 transitions, 114705 flow [2022-11-16 11:42:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-16 11:42:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2022-11-16 11:42:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 6757 transitions. [2022-11-16 11:42:31,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6223061337262847 [2022-11-16 11:42:31,266 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 6757 transitions. [2022-11-16 11:42:31,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 6757 transitions. [2022-11-16 11:42:31,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:42:31,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 6757 transitions. [2022-11-16 11:42:31,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 55.385245901639344) internal successors, (6757), 122 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:31,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:31,281 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:31,281 INFO L175 Difference]: Start difference. First operand has 1577 places, 2694 transitions, 102019 flow. Second operand 122 states and 6757 transitions. [2022-11-16 11:42:31,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1692 places, 2878 transitions, 114705 flow [2022-11-16 11:42:42,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1572 places, 2878 transitions, 111808 flow, removed 354 selfloop flow, removed 120 redundant places. [2022-11-16 11:42:42,150 INFO L231 Difference]: Finished difference. Result has 1590 places, 2770 transitions, 108228 flow [2022-11-16 11:42:42,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=99258, PETRI_DIFFERENCE_MINUEND_PLACES=1451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1932, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=108228, PETRI_PLACES=1590, PETRI_TRANSITIONS=2770} [2022-11-16 11:42:42,153 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1511 predicate places. [2022-11-16 11:42:42,153 INFO L495 AbstractCegarLoop]: Abstraction has has 1590 places, 2770 transitions, 108228 flow [2022-11-16 11:42:42,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:42,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:42:42,154 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] [2022-11-16 11:42:42,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:42,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:42,355 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:42:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:42,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1225450363, now seen corresponding path program 3 times [2022-11-16 11:42:42,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:42,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535667897] [2022-11-16 11:42:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:42,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:42,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535667897] [2022-11-16 11:42:42,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535667897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228432179] [2022-11-16 11:42:42,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:42:42,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:42,823 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:42,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 11:42:42,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:42:42,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:42:42,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:42:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:43,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:44,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228432179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:44,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:44,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-11-16 11:42:44,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131962877] [2022-11-16 11:42:44,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:44,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:42:44,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:42:44,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:42:44,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-16 11:42:44,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1590 places, 2770 transitions, 108228 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:44,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:42:44,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-16 11:42:44,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:07,456 INFO L130 PetriNetUnfolder]: 3309/10129 cut-off events. [2022-11-16 11:43:07,457 INFO L131 PetriNetUnfolder]: For 1208951/1208966 co-relation queries the response was YES. [2022-11-16 11:43:07,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143855 conditions, 10129 events. 3309/10129 cut-off events. For 1208951/1208966 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 111613 event pairs, 251 based on Foata normal form. 69/10171 useless extension candidates. Maximal degree in co-relation 143578. Up to 2103 conditions per place. [2022-11-16 11:43:08,087 INFO L137 encePairwiseOnDemand]: 70/89 looper letters, 1052 selfloop transitions, 2634 changer transitions 69/3796 dead transitions. [2022-11-16 11:43:08,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1724 places, 3796 transitions, 155003 flow [2022-11-16 11:43:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-16 11:43:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2022-11-16 11:43:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 7752 transitions. [2022-11-16 11:43:08,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6177384652163519 [2022-11-16 11:43:08,091 INFO L72 ComplementDD]: Start complementDD. Operand 141 states and 7752 transitions. [2022-11-16 11:43:08,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 7752 transitions. [2022-11-16 11:43:08,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:08,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 141 states and 7752 transitions. [2022-11-16 11:43:08,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 142 states, 141 states have (on average 54.97872340425532) internal successors, (7752), 141 states have internal predecessors, (7752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:08,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 142 states, 142 states have (on average 89.0) internal successors, (12638), 142 states have internal predecessors, (12638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:08,108 INFO L81 ComplementDD]: Finished complementDD. Result has 142 states, 142 states have (on average 89.0) internal successors, (12638), 142 states have internal predecessors, (12638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:08,108 INFO L175 Difference]: Start difference. First operand has 1590 places, 2770 transitions, 108228 flow. Second operand 141 states and 7752 transitions. [2022-11-16 11:43:08,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1724 places, 3796 transitions, 155003 flow [2022-11-16 11:43:24,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1658 places, 3796 transitions, 151467 flow, removed 230 selfloop flow, removed 66 redundant places. [2022-11-16 11:43:24,801 INFO L231 Difference]: Finished difference. Result has 1692 places, 3409 transitions, 140099 flow [2022-11-16 11:43:24,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=105554, PETRI_DIFFERENCE_MINUEND_PLACES=1518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2026, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=141, PETRI_FLOW=140099, PETRI_PLACES=1692, PETRI_TRANSITIONS=3409} [2022-11-16 11:43:24,803 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1613 predicate places. [2022-11-16 11:43:24,803 INFO L495 AbstractCegarLoop]: Abstraction has has 1692 places, 3409 transitions, 140099 flow [2022-11-16 11:43:24,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:24,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:24,803 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] [2022-11-16 11:43:24,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:25,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:25,004 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:25,005 INFO L85 PathProgramCache]: Analyzing trace with hash -660777433, now seen corresponding path program 4 times [2022-11-16 11:43:25,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:25,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603294652] [2022-11-16 11:43:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:25,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:25,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:25,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603294652] [2022-11-16 11:43:25,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603294652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:25,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412687020] [2022-11-16 11:43:25,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:43:25,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:25,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:25,424 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:43:25,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31342c6a-367c-45c5-b931-e6f340d55e62/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 11:43:25,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:43:25,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:43:25,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:43:25,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:26,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:26,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412687020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:43:26,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:43:26,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-11-16 11:43:26,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156535184] [2022-11-16 11:43:26,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:26,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:43:26,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:26,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:43:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:43:26,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-16 11:43:26,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1692 places, 3409 transitions, 140099 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:26,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:26,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-16 11:43:26,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:50,269 INFO L130 PetriNetUnfolder]: 3245/9727 cut-off events. [2022-11-16 11:43:50,269 INFO L131 PetriNetUnfolder]: For 1389319/1389342 co-relation queries the response was YES. [2022-11-16 11:43:50,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153364 conditions, 9727 events. 3245/9727 cut-off events. For 1389319/1389342 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 104657 event pairs, 406 based on Foata normal form. 19/9716 useless extension candidates. Maximal degree in co-relation 153066. Up to 3627 conditions per place. [2022-11-16 11:43:50,889 INFO L137 encePairwiseOnDemand]: 70/89 looper letters, 1251 selfloop transitions, 2195 changer transitions 42/3529 dead transitions. [2022-11-16 11:43:50,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1764 places, 3529 transitions, 150753 flow [2022-11-16 11:43:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-16 11:43:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-11-16 11:43:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 4683 transitions. [2022-11-16 11:43:51,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.619035029742234 [2022-11-16 11:43:51,015 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 4683 transitions. [2022-11-16 11:43:51,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 4683 transitions. [2022-11-16 11:43:51,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:51,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 4683 transitions. [2022-11-16 11:43:51,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 55.09411764705882) internal successors, (4683), 85 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:51,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 89.0) internal successors, (7654), 86 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:51,029 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 89.0) internal successors, (7654), 86 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:51,029 INFO L175 Difference]: Start difference. First operand has 1692 places, 3409 transitions, 140099 flow. Second operand 85 states and 4683 transitions. [2022-11-16 11:43:51,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1764 places, 3529 transitions, 150753 flow