./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R --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 e9065224c0b163ad014fc0aee4009feab43ed37ef70e06d8d8f3b14d045f755a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:08:13,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:08:13,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:08:13,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:08:13,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:08:13,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:08:13,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:08:13,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:08:13,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:08:13,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:08:13,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:08:13,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:08:13,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:08:13,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:08:13,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:08:13,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:08:13,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:08:13,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:08:13,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:08:13,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:08:13,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:08:13,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:08:13,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:08:13,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:08:13,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:08:13,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:08:13,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:08:13,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:08:13,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:08:13,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:08:13,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:08:13,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:08:13,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:08:13,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:08:13,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:08:13,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:08:13,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:08:13,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:08:13,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:08:13,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:08:13,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:08:13,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:08:13,677 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:08:13,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:08:13,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:08:13,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:08:13,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:08:13,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:08:13,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:08:13,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:08:13,680 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:08:13,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:08:13,682 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:08:13,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:08:13,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:08:13,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:08:13,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:08:13,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:08:13,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:08:13,684 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:08:13,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:08:13,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:08:13,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:08:13,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:08:13,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:08:13,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:08:13,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:08:13,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:08:13,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:08:13,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:08:13,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:08:13,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:08:13,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:08:13,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:08:13,688 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:08:13,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:08:13,689 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9065224c0b163ad014fc0aee4009feab43ed37ef70e06d8d8f3b14d045f755a [2022-11-25 18:08:13,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:08:13,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:08:13,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:08:13,972 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:08:13,972 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:08:13,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2022-11-25 18:08:16,995 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:08:17,185 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:08:17,185 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2022-11-25 18:08:17,193 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/data/8eb1c512d/6ba7986b929a419ea453ec81c7667770/FLAGbd664e776 [2022-11-25 18:08:17,206 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/data/8eb1c512d/6ba7986b929a419ea453ec81c7667770 [2022-11-25 18:08:17,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:08:17,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:08:17,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:08:17,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:08:17,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:08:17,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37a64adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17, skipping insertion in model container [2022-11-25 18:08:17,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:08:17,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:08:17,418 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c[2566,2579] [2022-11-25 18:08:17,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:08:17,436 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:08:17,462 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c[2566,2579] [2022-11-25 18:08:17,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:08:17,487 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:08:17,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17 WrapperNode [2022-11-25 18:08:17,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:08:17,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:08:17,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:08:17,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:08:17,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,539 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 174 [2022-11-25 18:08:17,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:08:17,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:08:17,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:08:17,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:08:17,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,567 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:08:17,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:08:17,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:08:17,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:08:17,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (1/1) ... [2022-11-25 18:08:17,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:08:17,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:17,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:08:17,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:08:17,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:08:17,664 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:08:17,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:08:17,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:08:17,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:08:17,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:08:17,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:08:17,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:08:17,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:08:17,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:08:17,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:08:17,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:08:17,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:08:17,670 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:08:17,773 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:08:17,775 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:08:18,191 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:08:18,210 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:08:18,210 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 18:08:18,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:08:18 BoogieIcfgContainer [2022-11-25 18:08:18,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:08:18,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:08:18,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:08:18,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:08:18,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:08:17" (1/3) ... [2022-11-25 18:08:18,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce548e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:08:18, skipping insertion in model container [2022-11-25 18:08:18,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:17" (2/3) ... [2022-11-25 18:08:18,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce548e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:08:18, skipping insertion in model container [2022-11-25 18:08:18,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:08:18" (3/3) ... [2022-11-25 18:08:18,231 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2022-11-25 18:08:18,239 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:08:18,248 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:08:18,248 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:08:18,248 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:08:18,345 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:08:18,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 212 transitions, 440 flow [2022-11-25 18:08:18,506 INFO L130 PetriNetUnfolder]: 19/210 cut-off events. [2022-11-25 18:08:18,506 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:08:18,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 210 events. 19/210 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 216 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 150. Up to 3 conditions per place. [2022-11-25 18:08:18,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 212 transitions, 440 flow [2022-11-25 18:08:18,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 201 transitions, 414 flow [2022-11-25 18:08:18,523 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:08:18,542 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 201 transitions, 414 flow [2022-11-25 18:08:18,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 201 transitions, 414 flow [2022-11-25 18:08:18,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 201 transitions, 414 flow [2022-11-25 18:08:18,623 INFO L130 PetriNetUnfolder]: 19/201 cut-off events. [2022-11-25 18:08:18,623 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:08:18,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 201 events. 19/201 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 216 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 150. Up to 3 conditions per place. [2022-11-25 18:08:18,628 INFO L119 LiptonReduction]: Number of co-enabled transitions 3500 [2022-11-25 18:08:25,545 INFO L134 LiptonReduction]: Checked pairs total: 4258 [2022-11-25 18:08:25,545 INFO L136 LiptonReduction]: Total number of compositions: 224 [2022-11-25 18:08:25,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:08:25,587 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;@645d58a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:08:25,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 18:08:25,602 INFO L130 PetriNetUnfolder]: 6/24 cut-off events. [2022-11-25 18:08:25,605 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:08:25,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:25,607 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:25,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash -234475303, now seen corresponding path program 1 times [2022-11-25 18:08:25,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:25,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390784452] [2022-11-25 18:08:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:25,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:26,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:26,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390784452] [2022-11-25 18:08:26,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390784452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:26,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:26,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:08:26,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941400192] [2022-11-25 18:08:26,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:26,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:08:26,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:08:26,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:08:26,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 436 [2022-11-25 18:08:26,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:26,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:26,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 436 [2022-11-25 18:08:26,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:26,297 INFO L130 PetriNetUnfolder]: 91/158 cut-off events. [2022-11-25 18:08:26,298 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 18:08:26,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 158 events. 91/158 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 404 event pairs, 51 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 278. Up to 151 conditions per place. [2022-11-25 18:08:26,304 INFO L137 encePairwiseOnDemand]: 431/436 looper letters, 22 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2022-11-25 18:08:26,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 118 flow [2022-11-25 18:08:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:08:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:08:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2022-11-25 18:08:26,321 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4525993883792049 [2022-11-25 18:08:26,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2022-11-25 18:08:26,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2022-11-25 18:08:26,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:26,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2022-11-25 18:08:26,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:26,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:26,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:26,347 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 3 states and 592 transitions. [2022-11-25 18:08:26,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 118 flow [2022-11-25 18:08:26,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:08:26,362 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 76 flow [2022-11-25 18:08:26,364 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2022-11-25 18:08:26,368 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2022-11-25 18:08:26,369 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 76 flow [2022-11-25 18:08:26,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:26,370 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:26,370 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:26,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:08:26,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash 705858223, now seen corresponding path program 1 times [2022-11-25 18:08:26,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:26,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617331301] [2022-11-25 18:08:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:26,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:08:26,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:26,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617331301] [2022-11-25 18:08:26,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617331301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489191925] [2022-11-25 18:08:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:26,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:26,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:26,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:26,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:08:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:26,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:08:26,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:08:26,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:08:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:08:26,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489191925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:08:26,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:08:26,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-25 18:08:26,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573788655] [2022-11-25 18:08:26,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:08:26,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:08:26,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:26,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:08:26,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:08:27,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 436 [2022-11-25 18:08:27,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 76 flow. Second operand has 8 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:27,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 436 [2022-11-25 18:08:27,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:27,227 INFO L130 PetriNetUnfolder]: 91/164 cut-off events. [2022-11-25 18:08:27,227 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:08:27,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 164 events. 91/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 399 event pairs, 51 based on Foata normal form. 3/126 useless extension candidates. Maximal degree in co-relation 318. Up to 151 conditions per place. [2022-11-25 18:08:27,229 INFO L137 encePairwiseOnDemand]: 431/436 looper letters, 22 selfloop transitions, 10 changer transitions 0/33 dead transitions. [2022-11-25 18:08:27,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 164 flow [2022-11-25 18:08:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:08:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:08:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1142 transitions. [2022-11-25 18:08:27,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43654434250764523 [2022-11-25 18:08:27,234 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1142 transitions. [2022-11-25 18:08:27,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1142 transitions. [2022-11-25 18:08:27,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:27,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1142 transitions. [2022-11-25 18:08:27,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.33333333333334) internal successors, (1142), 6 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,246 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 436.0) internal successors, (3052), 7 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,247 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 76 flow. Second operand 6 states and 1142 transitions. [2022-11-25 18:08:27,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 164 flow [2022-11-25 18:08:27,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:08:27,249 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 138 flow [2022-11-25 18:08:27,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2022-11-25 18:08:27,249 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2022-11-25 18:08:27,250 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 138 flow [2022-11-25 18:08:27,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,251 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:27,251 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:27,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:27,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:27,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:27,459 INFO L85 PathProgramCache]: Analyzing trace with hash -770176703, now seen corresponding path program 2 times [2022-11-25 18:08:27,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:27,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041772274] [2022-11-25 18:08:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:27,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:08:27,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:27,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041772274] [2022-11-25 18:08:27,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041772274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:27,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648683682] [2022-11-25 18:08:27,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:08:27,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:27,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:27,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:27,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:08:27,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:08:27,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:27,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:08:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 18:08:28,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:28,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648683682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:28,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:08:28,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-25 18:08:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038156335] [2022-11-25 18:08:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:28,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:08:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:08:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:08:28,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 436 [2022-11-25 18:08:28,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:28,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:28,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 436 [2022-11-25 18:08:28,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:28,293 INFO L130 PetriNetUnfolder]: 173/320 cut-off events. [2022-11-25 18:08:28,293 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:08:28,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 320 events. 173/320 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1121 event pairs, 51 based on Foata normal form. 4/245 useless extension candidates. Maximal degree in co-relation 617. Up to 147 conditions per place. [2022-11-25 18:08:28,296 INFO L137 encePairwiseOnDemand]: 430/436 looper letters, 51 selfloop transitions, 5 changer transitions 2/59 dead transitions. [2022-11-25 18:08:28,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 59 transitions, 312 flow [2022-11-25 18:08:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:08:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:08:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1001 transitions. [2022-11-25 18:08:28,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4591743119266055 [2022-11-25 18:08:28,300 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1001 transitions. [2022-11-25 18:08:28,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1001 transitions. [2022-11-25 18:08:28,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:28,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1001 transitions. [2022-11-25 18:08:28,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:28,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 436.0) internal successors, (2616), 6 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:28,310 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 436.0) internal successors, (2616), 6 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:28,310 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 138 flow. Second operand 5 states and 1001 transitions. [2022-11-25 18:08:28,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 59 transitions, 312 flow [2022-11-25 18:08:28,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 59 transitions, 296 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 18:08:28,313 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 146 flow [2022-11-25 18:08:28,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2022-11-25 18:08:28,314 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2022-11-25 18:08:28,315 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 146 flow [2022-11-25 18:08:28,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:28,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:28,316 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:28,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:28,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:28,523 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash -141265149, now seen corresponding path program 3 times [2022-11-25 18:08:28,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:28,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195385841] [2022-11-25 18:08:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:28,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:08:28,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:28,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195385841] [2022-11-25 18:08:28,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195385841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:28,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329315919] [2022-11-25 18:08:28,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:08:28,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:28,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:28,735 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:28,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:08:28,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 18:08:28,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:28,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:08:28,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 18:08:28,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:28,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329315919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:28,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:08:28,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-25 18:08:28,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141316780] [2022-11-25 18:08:28,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:28,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:08:28,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:08:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:08:28,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 436 [2022-11-25 18:08:28,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:28,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:28,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 436 [2022-11-25 18:08:28,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:29,086 INFO L130 PetriNetUnfolder]: 211/384 cut-off events. [2022-11-25 18:08:29,087 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2022-11-25 18:08:29,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 384 events. 211/384 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1380 event pairs, 50 based on Foata normal form. 4/325 useless extension candidates. Maximal degree in co-relation 836. Up to 271 conditions per place. [2022-11-25 18:08:29,090 INFO L137 encePairwiseOnDemand]: 431/436 looper letters, 49 selfloop transitions, 4 changer transitions 3/57 dead transitions. [2022-11-25 18:08:29,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 318 flow [2022-11-25 18:08:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:08:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:08:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 807 transitions. [2022-11-25 18:08:29,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46272935779816515 [2022-11-25 18:08:29,094 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 807 transitions. [2022-11-25 18:08:29,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 807 transitions. [2022-11-25 18:08:29,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:29,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 807 transitions. [2022-11-25 18:08:29,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.75) internal successors, (807), 4 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:29,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 436.0) internal successors, (2180), 5 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:29,102 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 436.0) internal successors, (2180), 5 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:29,102 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 146 flow. Second operand 4 states and 807 transitions. [2022-11-25 18:08:29,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 318 flow [2022-11-25 18:08:29,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:08:29,110 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 180 flow [2022-11-25 18:08:29,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2022-11-25 18:08:29,112 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 15 predicate places. [2022-11-25 18:08:29,113 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 180 flow [2022-11-25 18:08:29,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:29,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:29,114 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:29,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:29,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash -349968635, now seen corresponding path program 4 times [2022-11-25 18:08:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:29,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194725541] [2022-11-25 18:08:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:29,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:08:29,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:29,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194725541] [2022-11-25 18:08:29,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194725541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:29,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737456595] [2022-11-25 18:08:29,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:08:29,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:29,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:29,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:29,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:08:29,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:08:29,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:29,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:08:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 18:08:29,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:29,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737456595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:29,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:08:29,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-25 18:08:29,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163490974] [2022-11-25 18:08:29,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:29,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:08:29,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:29,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:08:29,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:08:29,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 436 [2022-11-25 18:08:29,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:29,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:29,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 436 [2022-11-25 18:08:29,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:29,879 INFO L130 PetriNetUnfolder]: 201/364 cut-off events. [2022-11-25 18:08:29,879 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2022-11-25 18:08:29,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 364 events. 201/364 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1263 event pairs, 53 based on Foata normal form. 4/309 useless extension candidates. Maximal degree in co-relation 861. Up to 163 conditions per place. [2022-11-25 18:08:29,883 INFO L137 encePairwiseOnDemand]: 431/436 looper letters, 52 selfloop transitions, 7 changer transitions 3/63 dead transitions. [2022-11-25 18:08:29,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 63 transitions, 371 flow [2022-11-25 18:08:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:08:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:08:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 811 transitions. [2022-11-25 18:08:29,886 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4650229357798165 [2022-11-25 18:08:29,886 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 811 transitions. [2022-11-25 18:08:29,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 811 transitions. [2022-11-25 18:08:29,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:29,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 811 transitions. [2022-11-25 18:08:29,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:29,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 436.0) internal successors, (2180), 5 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:29,893 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 436.0) internal successors, (2180), 5 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:29,893 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 180 flow. Second operand 4 states and 811 transitions. [2022-11-25 18:08:29,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 63 transitions, 371 flow [2022-11-25 18:08:29,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 63 transitions, 367 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-25 18:08:29,896 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 205 flow [2022-11-25 18:08:29,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2022-11-25 18:08:29,897 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2022-11-25 18:08:29,897 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 205 flow [2022-11-25 18:08:29,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:29,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:29,898 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:29,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:30,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:30,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1483852598, now seen corresponding path program 1 times [2022-11-25 18:08:30,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:30,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479245192] [2022-11-25 18:08:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:30,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:08:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479245192] [2022-11-25 18:08:30,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479245192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122640554] [2022-11-25 18:08:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:30,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:30,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:30,362 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:30,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:08:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:08:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:08:30,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:08:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:08:30,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122640554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:08:30,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:08:30,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-11-25 18:08:30,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15487669] [2022-11-25 18:08:30,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:08:30,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:08:30,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:30,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:08:30,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:08:30,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 436 [2022-11-25 18:08:30,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 205 flow. Second operand has 17 states, 17 states have (on average 186.11764705882354) internal successors, (3164), 17 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:30,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:30,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 436 [2022-11-25 18:08:30,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:31,153 INFO L130 PetriNetUnfolder]: 198/356 cut-off events. [2022-11-25 18:08:31,154 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-11-25 18:08:31,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 356 events. 198/356 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1204 event pairs, 114 based on Foata normal form. 1/297 useless extension candidates. Maximal degree in co-relation 861. Up to 332 conditions per place. [2022-11-25 18:08:31,158 INFO L137 encePairwiseOnDemand]: 431/436 looper letters, 29 selfloop transitions, 12 changer transitions 0/42 dead transitions. [2022-11-25 18:08:31,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 299 flow [2022-11-25 18:08:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:08:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:08:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1324 transitions. [2022-11-25 18:08:31,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4338138925294889 [2022-11-25 18:08:31,164 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1324 transitions. [2022-11-25 18:08:31,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1324 transitions. [2022-11-25 18:08:31,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:31,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1324 transitions. [2022-11-25 18:08:31,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 189.14285714285714) internal successors, (1324), 7 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:31,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 436.0) internal successors, (3488), 8 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:31,176 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 436.0) internal successors, (3488), 8 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:31,177 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 205 flow. Second operand 7 states and 1324 transitions. [2022-11-25 18:08:31,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 299 flow [2022-11-25 18:08:31,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 287 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 18:08:31,181 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 239 flow [2022-11-25 18:08:31,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2022-11-25 18:08:31,184 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2022-11-25 18:08:31,184 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 239 flow [2022-11-25 18:08:31,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 186.11764705882354) internal successors, (3164), 17 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:31,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:31,187 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:31,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:31,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 18:08:31,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:31,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:31,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2010025640, now seen corresponding path program 2 times [2022-11-25 18:08:31,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:31,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848731685] [2022-11-25 18:08:31,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:31,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:08:33,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:33,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848731685] [2022-11-25 18:08:33,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848731685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:33,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427195381] [2022-11-25 18:08:33,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:08:33,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:33,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:33,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:33,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:08:34,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:08:34,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:34,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 18:08:34,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:08:34,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:34,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427195381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:34,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:08:34,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 25 [2022-11-25 18:08:34,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289209857] [2022-11-25 18:08:34,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:34,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:08:34,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:08:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:08:35,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:08:35,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 239 flow. Second operand has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:35,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:35,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:08:35,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:35,602 INFO L130 PetriNetUnfolder]: 255/453 cut-off events. [2022-11-25 18:08:35,602 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2022-11-25 18:08:35,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 453 events. 255/453 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1677 event pairs, 32 based on Foata normal form. 9/383 useless extension candidates. Maximal degree in co-relation 1052. Up to 123 conditions per place. [2022-11-25 18:08:35,607 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 71 selfloop transitions, 19 changer transitions 10/101 dead transitions. [2022-11-25 18:08:35,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 101 transitions, 609 flow [2022-11-25 18:08:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:08:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:08:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1596 transitions. [2022-11-25 18:08:35,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40672782874617736 [2022-11-25 18:08:35,614 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1596 transitions. [2022-11-25 18:08:35,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1596 transitions. [2022-11-25 18:08:35,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:35,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1596 transitions. [2022-11-25 18:08:35,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 177.33333333333334) internal successors, (1596), 9 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:35,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:35,655 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:35,656 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 239 flow. Second operand 9 states and 1596 transitions. [2022-11-25 18:08:35,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 101 transitions, 609 flow [2022-11-25 18:08:35,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 101 transitions, 585 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-25 18:08:35,661 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 373 flow [2022-11-25 18:08:35,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2022-11-25 18:08:35,663 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2022-11-25 18:08:35,663 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 373 flow [2022-11-25 18:08:35,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:35,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:35,665 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:35,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:35,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:35,871 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:35,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1461808356, now seen corresponding path program 3 times [2022-11-25 18:08:35,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:35,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782765962] [2022-11-25 18:08:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:35,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:08:36,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:36,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782765962] [2022-11-25 18:08:36,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782765962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:36,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:36,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:08:36,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610434786] [2022-11-25 18:08:36,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:36,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:08:36,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:36,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:08:36,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:08:37,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:08:37,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 373 flow. Second operand has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:37,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:37,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:08:37,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:38,029 INFO L130 PetriNetUnfolder]: 266/472 cut-off events. [2022-11-25 18:08:38,029 INFO L131 PetriNetUnfolder]: For 458/460 co-relation queries the response was YES. [2022-11-25 18:08:38,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1574 conditions, 472 events. 266/472 cut-off events. For 458/460 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1763 event pairs, 34 based on Foata normal form. 9/481 useless extension candidates. Maximal degree in co-relation 1543. Up to 146 conditions per place. [2022-11-25 18:08:38,033 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 68 selfloop transitions, 22 changer transitions 9/100 dead transitions. [2022-11-25 18:08:38,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 100 transitions, 719 flow [2022-11-25 18:08:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:08:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:08:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1590 transitions. [2022-11-25 18:08:38,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40519877675840976 [2022-11-25 18:08:38,039 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1590 transitions. [2022-11-25 18:08:38,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1590 transitions. [2022-11-25 18:08:38,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:38,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1590 transitions. [2022-11-25 18:08:38,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.66666666666666) internal successors, (1590), 9 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:38,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:38,051 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:38,052 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 373 flow. Second operand 9 states and 1590 transitions. [2022-11-25 18:08:38,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 100 transitions, 719 flow [2022-11-25 18:08:38,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 700 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-25 18:08:38,058 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 463 flow [2022-11-25 18:08:38,059 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=463, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2022-11-25 18:08:38,061 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2022-11-25 18:08:38,062 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 463 flow [2022-11-25 18:08:38,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:38,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:38,063 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:38,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:08:38,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:38,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:38,064 INFO L85 PathProgramCache]: Analyzing trace with hash 790841962, now seen corresponding path program 4 times [2022-11-25 18:08:38,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:38,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296713978] [2022-11-25 18:08:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:38,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:08:39,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:39,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296713978] [2022-11-25 18:08:39,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296713978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:39,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:39,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:08:39,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798136516] [2022-11-25 18:08:39,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:39,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:08:39,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:08:39,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:08:39,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:08:39,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 463 flow. Second operand has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:39,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:39,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:08:39,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:40,232 INFO L130 PetriNetUnfolder]: 281/525 cut-off events. [2022-11-25 18:08:40,232 INFO L131 PetriNetUnfolder]: For 1107/1109 co-relation queries the response was YES. [2022-11-25 18:08:40,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 525 events. 281/525 cut-off events. For 1107/1109 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2136 event pairs, 35 based on Foata normal form. 15/540 useless extension candidates. Maximal degree in co-relation 1928. Up to 116 conditions per place. [2022-11-25 18:08:40,238 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 95 selfloop transitions, 34 changer transitions 7/137 dead transitions. [2022-11-25 18:08:40,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 137 transitions, 1030 flow [2022-11-25 18:08:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:08:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:08:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2470 transitions. [2022-11-25 18:08:40,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4046526867627785 [2022-11-25 18:08:40,246 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2470 transitions. [2022-11-25 18:08:40,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2470 transitions. [2022-11-25 18:08:40,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:40,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2470 transitions. [2022-11-25 18:08:40,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 176.42857142857142) internal successors, (2470), 14 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:40,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:40,266 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:40,267 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 463 flow. Second operand 14 states and 2470 transitions. [2022-11-25 18:08:40,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 137 transitions, 1030 flow [2022-11-25 18:08:40,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 137 transitions, 973 flow, removed 14 selfloop flow, removed 5 redundant places. [2022-11-25 18:08:40,276 INFO L231 Difference]: Finished difference. Result has 82 places, 74 transitions, 620 flow [2022-11-25 18:08:40,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=620, PETRI_PLACES=82, PETRI_TRANSITIONS=74} [2022-11-25 18:08:40,276 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 56 predicate places. [2022-11-25 18:08:40,277 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 74 transitions, 620 flow [2022-11-25 18:08:40,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:40,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:40,278 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:40,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:08:40,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2082489204, now seen corresponding path program 5 times [2022-11-25 18:08:40,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362615256] [2022-11-25 18:08:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:40,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:08:41,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:41,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362615256] [2022-11-25 18:08:41,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362615256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:41,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455255080] [2022-11-25 18:08:41,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:08:41,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:41,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:41,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:41,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:08:42,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 18:08:42,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:42,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 18:08:42,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:08:42,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:42,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455255080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:42,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:08:42,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 20 [2022-11-25 18:08:42,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998839112] [2022-11-25 18:08:42,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:42,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:08:42,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:08:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:08:42,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:08:42,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 620 flow. Second operand has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:42,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:42,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:08:42,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:43,279 INFO L130 PetriNetUnfolder]: 277/515 cut-off events. [2022-11-25 18:08:43,279 INFO L131 PetriNetUnfolder]: For 1799/1801 co-relation queries the response was YES. [2022-11-25 18:08:43,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2252 conditions, 515 events. 277/515 cut-off events. For 1799/1801 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2050 event pairs, 73 based on Foata normal form. 3/518 useless extension candidates. Maximal degree in co-relation 2205. Up to 184 conditions per place. [2022-11-25 18:08:43,284 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 71 selfloop transitions, 22 changer transitions 10/104 dead transitions. [2022-11-25 18:08:43,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 104 transitions, 955 flow [2022-11-25 18:08:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:08:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:08:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1581 transitions. [2022-11-25 18:08:43,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4029051987767584 [2022-11-25 18:08:43,289 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1581 transitions. [2022-11-25 18:08:43,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1581 transitions. [2022-11-25 18:08:43,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:43,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1581 transitions. [2022-11-25 18:08:43,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:43,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:43,301 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:43,301 INFO L175 Difference]: Start difference. First operand has 82 places, 74 transitions, 620 flow. Second operand 9 states and 1581 transitions. [2022-11-25 18:08:43,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 104 transitions, 955 flow [2022-11-25 18:08:43,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 899 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-11-25 18:08:43,318 INFO L231 Difference]: Finished difference. Result has 84 places, 71 transitions, 601 flow [2022-11-25 18:08:43,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=601, PETRI_PLACES=84, PETRI_TRANSITIONS=71} [2022-11-25 18:08:43,320 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 58 predicate places. [2022-11-25 18:08:43,320 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 71 transitions, 601 flow [2022-11-25 18:08:43,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:43,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:43,321 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:43,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:43,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:08:43,529 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:43,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1411522810, now seen corresponding path program 6 times [2022-11-25 18:08:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:43,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787464679] [2022-11-25 18:08:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:43,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:08:44,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:44,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787464679] [2022-11-25 18:08:44,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787464679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:44,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:44,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:08:44,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543206453] [2022-11-25 18:08:44,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:44,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:08:44,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:08:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:08:44,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:08:44,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 71 transitions, 601 flow. Second operand has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:44,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:44,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:08:44,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:45,353 INFO L130 PetriNetUnfolder]: 278/526 cut-off events. [2022-11-25 18:08:45,353 INFO L131 PetriNetUnfolder]: For 1694/1696 co-relation queries the response was YES. [2022-11-25 18:08:45,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 526 events. 278/526 cut-off events. For 1694/1696 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2146 event pairs, 67 based on Foata normal form. 3/529 useless extension candidates. Maximal degree in co-relation 2170. Up to 230 conditions per place. [2022-11-25 18:08:45,358 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 71 selfloop transitions, 23 changer transitions 8/103 dead transitions. [2022-11-25 18:08:45,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 103 transitions, 943 flow [2022-11-25 18:08:45,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:08:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:08:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1581 transitions. [2022-11-25 18:08:45,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4029051987767584 [2022-11-25 18:08:45,363 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1581 transitions. [2022-11-25 18:08:45,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1581 transitions. [2022-11-25 18:08:45,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:45,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1581 transitions. [2022-11-25 18:08:45,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.66666666666666) internal successors, (1581), 9 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:45,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:45,374 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:45,375 INFO L175 Difference]: Start difference. First operand has 84 places, 71 transitions, 601 flow. Second operand 9 states and 1581 transitions. [2022-11-25 18:08:45,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 103 transitions, 943 flow [2022-11-25 18:08:45,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 103 transitions, 875 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-11-25 18:08:45,389 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 594 flow [2022-11-25 18:08:45,389 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=594, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2022-11-25 18:08:45,390 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2022-11-25 18:08:45,390 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 594 flow [2022-11-25 18:08:45,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:45,391 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:45,391 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:45,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 18:08:45,392 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1157965028, now seen corresponding path program 7 times [2022-11-25 18:08:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:45,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129950855] [2022-11-25 18:08:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:45,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:08:46,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129950855] [2022-11-25 18:08:46,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129950855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:46,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:46,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:08:46,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042130612] [2022-11-25 18:08:46,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:46,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:08:46,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:08:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:08:46,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 436 [2022-11-25 18:08:46,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 594 flow. Second operand has 11 states, 11 states have (on average 170.72727272727272) internal successors, (1878), 11 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) [2022-11-25 18:08:46,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:46,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 436 [2022-11-25 18:08:46,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:47,493 INFO L130 PetriNetUnfolder]: 306/572 cut-off events. [2022-11-25 18:08:47,494 INFO L131 PetriNetUnfolder]: For 1624/1626 co-relation queries the response was YES. [2022-11-25 18:08:47,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2317 conditions, 572 events. 306/572 cut-off events. For 1624/1626 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2425 event pairs, 63 based on Foata normal form. 3/575 useless extension candidates. Maximal degree in co-relation 2272. Up to 242 conditions per place. [2022-11-25 18:08:47,499 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 78 selfloop transitions, 37 changer transitions 3/119 dead transitions. [2022-11-25 18:08:47,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1070 flow [2022-11-25 18:08:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:08:47,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:08:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1944 transitions. [2022-11-25 18:08:47,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4053377814845705 [2022-11-25 18:08:47,505 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1944 transitions. [2022-11-25 18:08:47,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1944 transitions. [2022-11-25 18:08:47,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:47,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1944 transitions. [2022-11-25 18:08:47,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 176.72727272727272) internal successors, (1944), 11 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:47,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 436.0) internal successors, (5232), 12 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:47,518 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 436.0) internal successors, (5232), 12 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:47,518 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 594 flow. Second operand 11 states and 1944 transitions. [2022-11-25 18:08:47,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1070 flow [2022-11-25 18:08:47,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 1009 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-25 18:08:47,528 INFO L231 Difference]: Finished difference. Result has 88 places, 85 transitions, 790 flow [2022-11-25 18:08:47,528 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=790, PETRI_PLACES=88, PETRI_TRANSITIONS=85} [2022-11-25 18:08:47,529 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 62 predicate places. [2022-11-25 18:08:47,529 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 85 transitions, 790 flow [2022-11-25 18:08:47,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 170.72727272727272) internal successors, (1878), 11 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) [2022-11-25 18:08:47,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:47,531 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:47,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:08:47,531 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:47,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:47,532 INFO L85 PathProgramCache]: Analyzing trace with hash 238661866, now seen corresponding path program 8 times [2022-11-25 18:08:47,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:47,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785905515] [2022-11-25 18:08:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:47,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:08:49,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785905515] [2022-11-25 18:08:49,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785905515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599975235] [2022-11-25 18:08:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:08:49,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:49,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:49,053 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:49,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:08:49,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:08:49,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:08:49,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:08:49,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:49,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599975235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:49,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:08:49,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 23 [2022-11-25 18:08:49,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069644721] [2022-11-25 18:08:49,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:49,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:08:49,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:49,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:08:49,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-11-25 18:08:50,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:08:50,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 85 transitions, 790 flow. Second operand has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:50,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:50,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:08:50,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:50,646 INFO L130 PetriNetUnfolder]: 357/643 cut-off events. [2022-11-25 18:08:50,647 INFO L131 PetriNetUnfolder]: For 2403/2405 co-relation queries the response was YES. [2022-11-25 18:08:50,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2901 conditions, 643 events. 357/643 cut-off events. For 2403/2405 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2720 event pairs, 50 based on Foata normal form. 7/650 useless extension candidates. Maximal degree in co-relation 2810. Up to 213 conditions per place. [2022-11-25 18:08:50,653 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 92 selfloop transitions, 36 changer transitions 9/138 dead transitions. [2022-11-25 18:08:50,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 1397 flow [2022-11-25 18:08:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:08:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:08:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1592 transitions. [2022-11-25 18:08:50,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4057084607543323 [2022-11-25 18:08:50,658 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1592 transitions. [2022-11-25 18:08:50,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1592 transitions. [2022-11-25 18:08:50,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:50,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1592 transitions. [2022-11-25 18:08:50,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.88888888888889) internal successors, (1592), 9 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:50,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:50,669 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:50,669 INFO L175 Difference]: Start difference. First operand has 88 places, 85 transitions, 790 flow. Second operand 9 states and 1592 transitions. [2022-11-25 18:08:50,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 1397 flow [2022-11-25 18:08:50,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 138 transitions, 1345 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-25 18:08:50,686 INFO L231 Difference]: Finished difference. Result has 97 places, 98 transitions, 1021 flow [2022-11-25 18:08:50,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1021, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2022-11-25 18:08:50,687 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2022-11-25 18:08:50,687 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 1021 flow [2022-11-25 18:08:50,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:50,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:50,688 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:50,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:50,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 18:08:50,894 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:50,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:50,895 INFO L85 PathProgramCache]: Analyzing trace with hash -70255542, now seen corresponding path program 9 times [2022-11-25 18:08:50,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:50,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445041666] [2022-11-25 18:08:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:50,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:52,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:52,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445041666] [2022-11-25 18:08:52,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445041666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:52,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144450684] [2022-11-25 18:08:52,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:08:52,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:52,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:52,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:52,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:08:53,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 18:08:53,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:53,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:08:53,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:53,597 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-11-25 18:08:53,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 47 [2022-11-25 18:08:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:08:53,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:53,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144450684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:53,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:08:53,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [20] total 27 [2022-11-25 18:08:53,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757516335] [2022-11-25 18:08:53,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:53,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:08:53,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:53,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:08:53,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-11-25 18:08:54,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 436 [2022-11-25 18:08:54,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 1021 flow. Second operand has 11 states, 11 states have (on average 170.72727272727272) internal successors, (1878), 11 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) [2022-11-25 18:08:54,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:54,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 436 [2022-11-25 18:08:54,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:54,994 INFO L130 PetriNetUnfolder]: 358/650 cut-off events. [2022-11-25 18:08:54,994 INFO L131 PetriNetUnfolder]: For 3682/3684 co-relation queries the response was YES. [2022-11-25 18:08:54,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3467 conditions, 650 events. 358/650 cut-off events. For 3682/3684 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2799 event pairs, 50 based on Foata normal form. 1/651 useless extension candidates. Maximal degree in co-relation 3411. Up to 213 conditions per place. [2022-11-25 18:08:55,002 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 93 selfloop transitions, 38 changer transitions 7/139 dead transitions. [2022-11-25 18:08:55,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 139 transitions, 1511 flow [2022-11-25 18:08:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:08:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:08:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1598 transitions. [2022-11-25 18:08:55,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4072375127420999 [2022-11-25 18:08:55,007 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1598 transitions. [2022-11-25 18:08:55,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1598 transitions. [2022-11-25 18:08:55,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:55,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1598 transitions. [2022-11-25 18:08:55,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 177.55555555555554) internal successors, (1598), 9 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:55,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:55,017 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:55,017 INFO L175 Difference]: Start difference. First operand has 97 places, 98 transitions, 1021 flow. Second operand 9 states and 1598 transitions. [2022-11-25 18:08:55,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 139 transitions, 1511 flow [2022-11-25 18:08:55,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 139 transitions, 1457 flow, removed 13 selfloop flow, removed 4 redundant places. [2022-11-25 18:08:55,040 INFO L231 Difference]: Finished difference. Result has 102 places, 100 transitions, 1079 flow [2022-11-25 18:08:55,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1079, PETRI_PLACES=102, PETRI_TRANSITIONS=100} [2022-11-25 18:08:55,041 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 76 predicate places. [2022-11-25 18:08:55,041 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 100 transitions, 1079 flow [2022-11-25 18:08:55,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 170.72727272727272) internal successors, (1878), 11 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) [2022-11-25 18:08:55,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:55,042 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:55,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:55,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:55,249 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:55,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:55,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1979511692, now seen corresponding path program 10 times [2022-11-25 18:08:55,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:55,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650327385] [2022-11-25 18:08:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:55,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:08:56,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:56,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650327385] [2022-11-25 18:08:56,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650327385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:56,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469899914] [2022-11-25 18:08:56,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:08:56,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:56,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:56,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:56,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:08:56,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:08:56,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:56,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 18:08:56,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:56,944 INFO L321 Elim1Store]: treesize reduction 3, result has 91.9 percent of original size [2022-11-25 18:08:56,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 60 [2022-11-25 18:08:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:08:57,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:57,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469899914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:57,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:08:57,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 22 [2022-11-25 18:08:57,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749382418] [2022-11-25 18:08:57,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:57,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:08:57,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:08:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:08:57,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 436 [2022-11-25 18:08:57,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 100 transitions, 1079 flow. Second operand has 8 states, 8 states have (on average 174.375) internal successors, (1395), 8 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:57,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:57,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 436 [2022-11-25 18:08:57,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:58,249 INFO L130 PetriNetUnfolder]: 368/692 cut-off events. [2022-11-25 18:08:58,250 INFO L131 PetriNetUnfolder]: For 3779/3781 co-relation queries the response was YES. [2022-11-25 18:08:58,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3580 conditions, 692 events. 368/692 cut-off events. For 3779/3781 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3165 event pairs, 77 based on Foata normal form. 1/693 useless extension candidates. Maximal degree in co-relation 3517. Up to 336 conditions per place. [2022-11-25 18:08:58,257 INFO L137 encePairwiseOnDemand]: 426/436 looper letters, 109 selfloop transitions, 27 changer transitions 7/144 dead transitions. [2022-11-25 18:08:58,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 144 transitions, 1618 flow [2022-11-25 18:08:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:08:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:08:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1449 transitions. [2022-11-25 18:08:58,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4154243119266055 [2022-11-25 18:08:58,261 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1449 transitions. [2022-11-25 18:08:58,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1449 transitions. [2022-11-25 18:08:58,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:58,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1449 transitions. [2022-11-25 18:08:58,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 181.125) internal successors, (1449), 8 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:58,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:58,269 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:58,270 INFO L175 Difference]: Start difference. First operand has 102 places, 100 transitions, 1079 flow. Second operand 8 states and 1449 transitions. [2022-11-25 18:08:58,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 144 transitions, 1618 flow [2022-11-25 18:08:58,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 144 transitions, 1528 flow, removed 9 selfloop flow, removed 7 redundant places. [2022-11-25 18:08:58,291 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 1121 flow [2022-11-25 18:08:58,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1121, PETRI_PLACES=104, PETRI_TRANSITIONS=103} [2022-11-25 18:08:58,292 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 78 predicate places. [2022-11-25 18:08:58,292 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 1121 flow [2022-11-25 18:08:58,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 174.375) internal successors, (1395), 8 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:58,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:58,293 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:58,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 18:08:58,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:58,498 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:08:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:58,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1655223916, now seen corresponding path program 11 times [2022-11-25 18:08:58,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:58,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532136191] [2022-11-25 18:08:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:58,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:08:59,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:59,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532136191] [2022-11-25 18:08:59,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532136191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:59,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:59,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:08:59,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462129883] [2022-11-25 18:08:59,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:59,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:08:59,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:59,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:08:59,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:08:59,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:08:59,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 1121 flow. Second operand has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:59,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:59,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:08:59,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:00,153 INFO L130 PetriNetUnfolder]: 366/682 cut-off events. [2022-11-25 18:09:00,154 INFO L131 PetriNetUnfolder]: For 3602/3604 co-relation queries the response was YES. [2022-11-25 18:09:00,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3430 conditions, 682 events. 366/682 cut-off events. For 3602/3604 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3083 event pairs, 79 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 3368. Up to 336 conditions per place. [2022-11-25 18:09:00,160 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 101 selfloop transitions, 24 changer transitions 9/135 dead transitions. [2022-11-25 18:09:00,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 1544 flow [2022-11-25 18:09:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:09:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:09:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1580 transitions. [2022-11-25 18:09:00,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4026503567787971 [2022-11-25 18:09:00,164 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1580 transitions. [2022-11-25 18:09:00,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1580 transitions. [2022-11-25 18:09:00,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:00,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1580 transitions. [2022-11-25 18:09:00,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.55555555555554) internal successors, (1580), 9 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:00,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:00,173 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:00,174 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 1121 flow. Second operand 9 states and 1580 transitions. [2022-11-25 18:09:00,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 1544 flow [2022-11-25 18:09:00,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1492 flow, removed 13 selfloop flow, removed 4 redundant places. [2022-11-25 18:09:00,195 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 1106 flow [2022-11-25 18:09:00,196 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1106, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-11-25 18:09:00,196 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 82 predicate places. [2022-11-25 18:09:00,197 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 1106 flow [2022-11-25 18:09:00,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:00,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:00,197 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:00,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 18:09:00,198 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:00,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash 129748666, now seen corresponding path program 12 times [2022-11-25 18:09:00,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:00,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907035031] [2022-11-25 18:09:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:00,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:01,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:01,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907035031] [2022-11-25 18:09:01,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907035031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:01,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:01,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:09:01,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94919921] [2022-11-25 18:09:01,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:01,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:09:01,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:01,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:09:01,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:09:01,810 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 436 [2022-11-25 18:09:01,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 1106 flow. Second operand has 12 states, 12 states have (on average 167.58333333333334) internal successors, (2011), 12 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:01,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:01,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 436 [2022-11-25 18:09:01,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:02,525 INFO L130 PetriNetUnfolder]: 399/760 cut-off events. [2022-11-25 18:09:02,525 INFO L131 PetriNetUnfolder]: For 4733/4735 co-relation queries the response was YES. [2022-11-25 18:09:02,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3803 conditions, 760 events. 399/760 cut-off events. For 4733/4735 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3654 event pairs, 87 based on Foata normal form. 22/782 useless extension candidates. Maximal degree in co-relation 3732. Up to 181 conditions per place. [2022-11-25 18:09:02,533 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 106 selfloop transitions, 37 changer transitions 6/150 dead transitions. [2022-11-25 18:09:02,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 150 transitions, 1714 flow [2022-11-25 18:09:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:09:02,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:09:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1737 transitions. [2022-11-25 18:09:02,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39839449541284405 [2022-11-25 18:09:02,537 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1737 transitions. [2022-11-25 18:09:02,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1737 transitions. [2022-11-25 18:09:02,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:02,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1737 transitions. [2022-11-25 18:09:02,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 173.7) internal successors, (1737), 10 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:02,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:09:02,551 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:09:02,551 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 1106 flow. Second operand 10 states and 1737 transitions. [2022-11-25 18:09:02,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 150 transitions, 1714 flow [2022-11-25 18:09:02,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 150 transitions, 1649 flow, removed 14 selfloop flow, removed 7 redundant places. [2022-11-25 18:09:02,577 INFO L231 Difference]: Finished difference. Result has 111 places, 105 transitions, 1225 flow [2022-11-25 18:09:02,577 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1225, PETRI_PLACES=111, PETRI_TRANSITIONS=105} [2022-11-25 18:09:02,578 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 85 predicate places. [2022-11-25 18:09:02,578 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 105 transitions, 1225 flow [2022-11-25 18:09:02,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.58333333333334) internal successors, (2011), 12 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:02,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:02,580 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:02,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 18:09:02,580 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:02,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1910134670, now seen corresponding path program 13 times [2022-11-25 18:09:02,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:02,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442890412] [2022-11-25 18:09:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:02,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:03,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442890412] [2022-11-25 18:09:03,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442890412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:03,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:03,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:09:03,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977929545] [2022-11-25 18:09:03,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:03,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:09:03,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:03,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:09:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:09:03,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:09:03,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 105 transitions, 1225 flow. Second operand has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:03,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:03,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:09:03,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:04,319 INFO L130 PetriNetUnfolder]: 496/940 cut-off events. [2022-11-25 18:09:04,319 INFO L131 PetriNetUnfolder]: For 5758/5760 co-relation queries the response was YES. [2022-11-25 18:09:04,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 940 events. 496/940 cut-off events. For 5758/5760 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4682 event pairs, 124 based on Foata normal form. 7/947 useless extension candidates. Maximal degree in co-relation 4702. Up to 573 conditions per place. [2022-11-25 18:09:04,329 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 133 selfloop transitions, 27 changer transitions 6/167 dead transitions. [2022-11-25 18:09:04,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 167 transitions, 2072 flow [2022-11-25 18:09:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:09:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:09:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1583 transitions. [2022-11-25 18:09:04,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40341488277268095 [2022-11-25 18:09:04,334 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1583 transitions. [2022-11-25 18:09:04,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1583 transitions. [2022-11-25 18:09:04,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:04,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1583 transitions. [2022-11-25 18:09:04,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.88888888888889) internal successors, (1583), 9 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:04,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:04,343 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:04,343 INFO L175 Difference]: Start difference. First operand has 111 places, 105 transitions, 1225 flow. Second operand 9 states and 1583 transitions. [2022-11-25 18:09:04,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 167 transitions, 2072 flow [2022-11-25 18:09:04,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 167 transitions, 2014 flow, removed 20 selfloop flow, removed 5 redundant places. [2022-11-25 18:09:04,376 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 1554 flow [2022-11-25 18:09:04,376 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1554, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2022-11-25 18:09:04,376 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 93 predicate places. [2022-11-25 18:09:04,377 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 1554 flow [2022-11-25 18:09:04,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:04,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:04,378 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:04,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 18:09:04,378 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:04,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1493367844, now seen corresponding path program 14 times [2022-11-25 18:09:04,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:04,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850542881] [2022-11-25 18:09:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:04,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:09:05,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:05,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850542881] [2022-11-25 18:09:05,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850542881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:05,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169465301] [2022-11-25 18:09:05,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:09:05,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:05,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:05,611 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:05,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:09:05,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:09:05,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:09:05,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 18:09:05,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:06,254 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-11-25 18:09:06,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 47 [2022-11-25 18:09:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:06,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:09:06,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169465301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:06,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:09:06,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 24 [2022-11-25 18:09:06,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252568728] [2022-11-25 18:09:06,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:06,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:09:06,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:06,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:09:06,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:09:07,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:09:07,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 1554 flow. Second operand has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:07,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:07,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:09:07,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:07,916 INFO L130 PetriNetUnfolder]: 499/954 cut-off events. [2022-11-25 18:09:07,917 INFO L131 PetriNetUnfolder]: For 6824/6826 co-relation queries the response was YES. [2022-11-25 18:09:07,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5127 conditions, 954 events. 499/954 cut-off events. For 6824/6826 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4873 event pairs, 65 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 5038. Up to 376 conditions per place. [2022-11-25 18:09:07,926 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 138 selfloop transitions, 46 changer transitions 7/192 dead transitions. [2022-11-25 18:09:07,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 192 transitions, 2429 flow [2022-11-25 18:09:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:09:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:09:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1760 transitions. [2022-11-25 18:09:07,931 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4036697247706422 [2022-11-25 18:09:07,931 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1760 transitions. [2022-11-25 18:09:07,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1760 transitions. [2022-11-25 18:09:07,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:07,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1760 transitions. [2022-11-25 18:09:07,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:07,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:09:07,940 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:09:07,940 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 1554 flow. Second operand 10 states and 1760 transitions. [2022-11-25 18:09:07,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 192 transitions, 2429 flow [2022-11-25 18:09:07,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 192 transitions, 2368 flow, removed 29 selfloop flow, removed 3 redundant places. [2022-11-25 18:09:07,977 INFO L231 Difference]: Finished difference. Result has 128 places, 130 transitions, 1750 flow [2022-11-25 18:09:07,978 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1750, PETRI_PLACES=128, PETRI_TRANSITIONS=130} [2022-11-25 18:09:07,978 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 102 predicate places. [2022-11-25 18:09:07,978 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 130 transitions, 1750 flow [2022-11-25 18:09:07,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:07,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:07,979 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:07,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:08,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:08,185 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:08,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1373374594, now seen corresponding path program 15 times [2022-11-25 18:09:08,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:08,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888854318] [2022-11-25 18:09:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:08,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888854318] [2022-11-25 18:09:10,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888854318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:10,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760020381] [2022-11-25 18:09:10,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:09:10,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:10,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:10,379 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:10,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:09:10,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 18:09:10,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:09:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 18:09:10,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:11,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:09:11,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:09:11,048 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 18:09:11,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-11-25 18:09:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:11,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:09:11,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760020381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:11,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:09:11,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20] total 29 [2022-11-25 18:09:11,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175307073] [2022-11-25 18:09:11,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:11,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:09:11,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:11,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:09:11,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-11-25 18:09:12,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 436 [2022-11-25 18:09:12,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 130 transitions, 1750 flow. Second operand has 12 states, 12 states have (on average 166.58333333333334) internal successors, (1999), 12 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:12,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:12,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 436 [2022-11-25 18:09:12,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:13,061 INFO L130 PetriNetUnfolder]: 509/982 cut-off events. [2022-11-25 18:09:13,062 INFO L131 PetriNetUnfolder]: For 7423/7425 co-relation queries the response was YES. [2022-11-25 18:09:13,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5442 conditions, 982 events. 509/982 cut-off events. For 7423/7425 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5084 event pairs, 82 based on Foata normal form. 14/996 useless extension candidates. Maximal degree in co-relation 5367. Up to 374 conditions per place. [2022-11-25 18:09:13,073 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 120 selfloop transitions, 58 changer transitions 6/185 dead transitions. [2022-11-25 18:09:13,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 2507 flow [2022-11-25 18:09:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:09:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:09:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1569 transitions. [2022-11-25 18:09:13,090 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39984709480122327 [2022-11-25 18:09:13,090 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1569 transitions. [2022-11-25 18:09:13,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1569 transitions. [2022-11-25 18:09:13,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:13,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1569 transitions. [2022-11-25 18:09:13,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.33333333333334) internal successors, (1569), 9 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:13,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:13,104 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:13,105 INFO L175 Difference]: Start difference. First operand has 128 places, 130 transitions, 1750 flow. Second operand 9 states and 1569 transitions. [2022-11-25 18:09:13,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 2507 flow [2022-11-25 18:09:13,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 185 transitions, 2470 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-11-25 18:09:13,148 INFO L231 Difference]: Finished difference. Result has 135 places, 141 transitions, 2046 flow [2022-11-25 18:09:13,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2046, PETRI_PLACES=135, PETRI_TRANSITIONS=141} [2022-11-25 18:09:13,149 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 109 predicate places. [2022-11-25 18:09:13,149 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 141 transitions, 2046 flow [2022-11-25 18:09:13,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.58333333333334) internal successors, (1999), 12 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:13,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:13,150 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:13,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:13,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:13,362 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:13,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1399014676, now seen corresponding path program 16 times [2022-11-25 18:09:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:13,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210318199] [2022-11-25 18:09:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:13,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:09:14,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:14,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210318199] [2022-11-25 18:09:14,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210318199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:14,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704518387] [2022-11-25 18:09:14,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:09:14,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:14,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:14,697 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:14,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:09:14,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:09:14,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:09:14,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:09:14,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:15,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:09:15,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:09:15,213 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 18:09:15,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-11-25 18:09:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:15,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:09:15,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704518387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:15,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:09:15,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 24 [2022-11-25 18:09:15,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063891276] [2022-11-25 18:09:15,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:15,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:09:15,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:15,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:09:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:09:16,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 436 [2022-11-25 18:09:16,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 141 transitions, 2046 flow. Second operand has 12 states, 12 states have (on average 166.58333333333334) internal successors, (1999), 12 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:16,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:16,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 436 [2022-11-25 18:09:16,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:17,064 INFO L130 PetriNetUnfolder]: 511/991 cut-off events. [2022-11-25 18:09:17,065 INFO L131 PetriNetUnfolder]: For 8930/8932 co-relation queries the response was YES. [2022-11-25 18:09:17,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5831 conditions, 991 events. 511/991 cut-off events. For 8930/8932 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5203 event pairs, 131 based on Foata normal form. 2/993 useless extension candidates. Maximal degree in co-relation 5734. Up to 279 conditions per place. [2022-11-25 18:09:17,075 INFO L137 encePairwiseOnDemand]: 426/436 looper letters, 112 selfloop transitions, 54 changer transitions 13/180 dead transitions. [2022-11-25 18:09:17,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 180 transitions, 2700 flow [2022-11-25 18:09:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:09:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:09:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1557 transitions. [2022-11-25 18:09:17,090 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3967889908256881 [2022-11-25 18:09:17,090 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1557 transitions. [2022-11-25 18:09:17,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1557 transitions. [2022-11-25 18:09:17,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:17,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1557 transitions. [2022-11-25 18:09:17,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.0) internal successors, (1557), 9 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:17,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:17,098 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:17,098 INFO L175 Difference]: Start difference. First operand has 135 places, 141 transitions, 2046 flow. Second operand 9 states and 1557 transitions. [2022-11-25 18:09:17,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 180 transitions, 2700 flow [2022-11-25 18:09:17,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 180 transitions, 2612 flow, removed 20 selfloop flow, removed 4 redundant places. [2022-11-25 18:09:17,155 INFO L231 Difference]: Finished difference. Result has 142 places, 142 transitions, 2116 flow [2022-11-25 18:09:17,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=1972, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2116, PETRI_PLACES=142, PETRI_TRANSITIONS=142} [2022-11-25 18:09:17,156 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 116 predicate places. [2022-11-25 18:09:17,156 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 142 transitions, 2116 flow [2022-11-25 18:09:17,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.58333333333334) internal successors, (1999), 12 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:17,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:17,157 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:17,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:17,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 18:09:17,368 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:17,369 INFO L85 PathProgramCache]: Analyzing trace with hash -169284844, now seen corresponding path program 17 times [2022-11-25 18:09:17,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:17,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296817184] [2022-11-25 18:09:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:17,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:17,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:17,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296817184] [2022-11-25 18:09:17,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296817184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:17,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:17,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:09:17,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879031919] [2022-11-25 18:09:17,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:17,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:09:17,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:09:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:09:18,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 436 [2022-11-25 18:09:18,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 142 transitions, 2116 flow. Second operand has 11 states, 11 states have (on average 171.72727272727272) internal successors, (1889), 11 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:18,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:18,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 436 [2022-11-25 18:09:18,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:19,172 INFO L130 PetriNetUnfolder]: 502/983 cut-off events. [2022-11-25 18:09:19,172 INFO L131 PetriNetUnfolder]: For 10069/10071 co-relation queries the response was YES. [2022-11-25 18:09:19,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5737 conditions, 983 events. 502/983 cut-off events. For 10069/10071 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5122 event pairs, 61 based on Foata normal form. 1/983 useless extension candidates. Maximal degree in co-relation 5638. Up to 302 conditions per place. [2022-11-25 18:09:19,181 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 156 selfloop transitions, 60 changer transitions 7/224 dead transitions. [2022-11-25 18:09:19,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 224 transitions, 3104 flow [2022-11-25 18:09:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:09:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:09:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2151 transitions. [2022-11-25 18:09:19,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4111238532110092 [2022-11-25 18:09:19,185 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2151 transitions. [2022-11-25 18:09:19,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2151 transitions. [2022-11-25 18:09:19,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:19,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2151 transitions. [2022-11-25 18:09:19,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 179.25) internal successors, (2151), 12 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:19,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 436.0) internal successors, (5668), 13 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:19,195 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 436.0) internal successors, (5668), 13 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:19,195 INFO L175 Difference]: Start difference. First operand has 142 places, 142 transitions, 2116 flow. Second operand 12 states and 2151 transitions. [2022-11-25 18:09:19,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 224 transitions, 3104 flow [2022-11-25 18:09:19,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 224 transitions, 2961 flow, removed 17 selfloop flow, removed 7 redundant places. [2022-11-25 18:09:19,247 INFO L231 Difference]: Finished difference. Result has 147 places, 152 transitions, 2251 flow [2022-11-25 18:09:19,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2251, PETRI_PLACES=147, PETRI_TRANSITIONS=152} [2022-11-25 18:09:19,248 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 121 predicate places. [2022-11-25 18:09:19,248 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 152 transitions, 2251 flow [2022-11-25 18:09:19,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.72727272727272) internal successors, (1889), 11 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:19,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:19,249 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:19,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 18:09:19,249 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:19,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1702544982, now seen corresponding path program 18 times [2022-11-25 18:09:19,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:19,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045801931] [2022-11-25 18:09:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:19,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:09:20,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:20,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045801931] [2022-11-25 18:09:20,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045801931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:20,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367747393] [2022-11-25 18:09:20,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:09:20,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:20,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:20,559 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:20,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 18:09:20,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 18:09:20,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:09:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 18:09:20,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:21,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:09:21,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:09:21,152 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 18:09:21,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-11-25 18:09:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:21,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:09:21,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367747393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:21,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:09:21,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 25 [2022-11-25 18:09:21,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439210689] [2022-11-25 18:09:21,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:21,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:09:21,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:21,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:09:21,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:09:22,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 436 [2022-11-25 18:09:22,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 152 transitions, 2251 flow. Second operand has 12 states, 12 states have (on average 166.58333333333334) internal successors, (1999), 12 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:22,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:22,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 436 [2022-11-25 18:09:22,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:23,090 INFO L130 PetriNetUnfolder]: 500/970 cut-off events. [2022-11-25 18:09:23,091 INFO L131 PetriNetUnfolder]: For 8903/8905 co-relation queries the response was YES. [2022-11-25 18:09:23,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5768 conditions, 970 events. 500/970 cut-off events. For 8903/8905 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5039 event pairs, 68 based on Foata normal form. 2/972 useless extension candidates. Maximal degree in co-relation 5684. Up to 380 conditions per place. [2022-11-25 18:09:23,100 INFO L137 encePairwiseOnDemand]: 426/436 looper letters, 120 selfloop transitions, 54 changer transitions 15/190 dead transitions. [2022-11-25 18:09:23,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 190 transitions, 2856 flow [2022-11-25 18:09:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:09:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:09:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1560 transitions. [2022-11-25 18:09:23,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39755351681957185 [2022-11-25 18:09:23,105 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1560 transitions. [2022-11-25 18:09:23,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1560 transitions. [2022-11-25 18:09:23,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:23,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1560 transitions. [2022-11-25 18:09:23,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:23,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:23,112 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:23,113 INFO L175 Difference]: Start difference. First operand has 147 places, 152 transitions, 2251 flow. Second operand 9 states and 1560 transitions. [2022-11-25 18:09:23,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 190 transitions, 2856 flow [2022-11-25 18:09:23,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 190 transitions, 2795 flow, removed 15 selfloop flow, removed 5 redundant places. [2022-11-25 18:09:23,167 INFO L231 Difference]: Finished difference. Result has 150 places, 147 transitions, 2218 flow [2022-11-25 18:09:23,168 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2196, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2218, PETRI_PLACES=150, PETRI_TRANSITIONS=147} [2022-11-25 18:09:23,168 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 124 predicate places. [2022-11-25 18:09:23,168 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 147 transitions, 2218 flow [2022-11-25 18:09:23,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.58333333333334) internal successors, (1999), 12 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:23,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:23,168 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:23,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:23,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 18:09:23,369 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash 800715060, now seen corresponding path program 19 times [2022-11-25 18:09:23,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:23,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494385398] [2022-11-25 18:09:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:23,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:09:24,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:24,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494385398] [2022-11-25 18:09:24,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494385398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:24,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235943739] [2022-11-25 18:09:24,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:09:24,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:24,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:24,703 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:24,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 18:09:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 18:09:24,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:25,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:09:25,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 18:09:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:25,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:09:25,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235943739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:25,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:09:25,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 26 [2022-11-25 18:09:25,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376560539] [2022-11-25 18:09:25,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:25,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:09:25,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:09:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-11-25 18:09:26,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 436 [2022-11-25 18:09:26,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 147 transitions, 2218 flow. Second operand has 12 states, 12 states have (on average 167.58333333333334) internal successors, (2011), 12 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:26,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:26,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 436 [2022-11-25 18:09:26,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:26,693 INFO L130 PetriNetUnfolder]: 481/934 cut-off events. [2022-11-25 18:09:26,693 INFO L131 PetriNetUnfolder]: For 8910/8912 co-relation queries the response was YES. [2022-11-25 18:09:26,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5632 conditions, 934 events. 481/934 cut-off events. For 8910/8912 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4748 event pairs, 64 based on Foata normal form. 7/941 useless extension candidates. Maximal degree in co-relation 5537. Up to 374 conditions per place. [2022-11-25 18:09:26,702 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 117 selfloop transitions, 63 changer transitions 6/187 dead transitions. [2022-11-25 18:09:26,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 187 transitions, 2821 flow [2022-11-25 18:09:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:09:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:09:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1738 transitions. [2022-11-25 18:09:26,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3986238532110092 [2022-11-25 18:09:26,705 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1738 transitions. [2022-11-25 18:09:26,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1738 transitions. [2022-11-25 18:09:26,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:26,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1738 transitions. [2022-11-25 18:09:26,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 173.8) internal successors, (1738), 10 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:26,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:09:26,713 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:09:26,713 INFO L175 Difference]: Start difference. First operand has 150 places, 147 transitions, 2218 flow. Second operand 10 states and 1738 transitions. [2022-11-25 18:09:26,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 187 transitions, 2821 flow [2022-11-25 18:09:26,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 187 transitions, 2670 flow, removed 17 selfloop flow, removed 11 redundant places. [2022-11-25 18:09:26,751 INFO L231 Difference]: Finished difference. Result has 146 places, 151 transitions, 2320 flow [2022-11-25 18:09:26,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2320, PETRI_PLACES=146, PETRI_TRANSITIONS=151} [2022-11-25 18:09:26,752 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 120 predicate places. [2022-11-25 18:09:26,752 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 151 transitions, 2320 flow [2022-11-25 18:09:26,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.58333333333334) internal successors, (2011), 12 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:26,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:26,753 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:26,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:26,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:26,959 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:26,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:26,960 INFO L85 PathProgramCache]: Analyzing trace with hash -493572620, now seen corresponding path program 20 times [2022-11-25 18:09:26,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:26,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450540978] [2022-11-25 18:09:26,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:26,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:27,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450540978] [2022-11-25 18:09:27,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450540978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:27,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:27,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:09:27,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426946833] [2022-11-25 18:09:27,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:27,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:09:27,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:09:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:09:27,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:09:27,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 151 transitions, 2320 flow. Second operand has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:27,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:27,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:09:27,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:28,612 INFO L130 PetriNetUnfolder]: 479/929 cut-off events. [2022-11-25 18:09:28,612 INFO L131 PetriNetUnfolder]: For 9111/9113 co-relation queries the response was YES. [2022-11-25 18:09:28,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5681 conditions, 929 events. 479/929 cut-off events. For 9111/9113 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4722 event pairs, 71 based on Foata normal form. 1/930 useless extension candidates. Maximal degree in co-relation 5588. Up to 291 conditions per place. [2022-11-25 18:09:28,618 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 144 selfloop transitions, 64 changer transitions 9/218 dead transitions. [2022-11-25 18:09:28,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 218 transitions, 3078 flow [2022-11-25 18:09:28,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:09:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:09:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2461 transitions. [2022-11-25 18:09:28,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40317824377457406 [2022-11-25 18:09:28,625 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2461 transitions. [2022-11-25 18:09:28,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2461 transitions. [2022-11-25 18:09:28,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:28,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2461 transitions. [2022-11-25 18:09:28,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 175.78571428571428) internal successors, (2461), 14 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:28,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:28,637 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:28,637 INFO L175 Difference]: Start difference. First operand has 146 places, 151 transitions, 2320 flow. Second operand 14 states and 2461 transitions. [2022-11-25 18:09:28,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 218 transitions, 3078 flow [2022-11-25 18:09:28,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 218 transitions, 2997 flow, removed 9 selfloop flow, removed 5 redundant places. [2022-11-25 18:09:28,688 INFO L231 Difference]: Finished difference. Result has 155 places, 149 transitions, 2341 flow [2022-11-25 18:09:28,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2247, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2341, PETRI_PLACES=155, PETRI_TRANSITIONS=149} [2022-11-25 18:09:28,689 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 129 predicate places. [2022-11-25 18:09:28,689 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 149 transitions, 2341 flow [2022-11-25 18:09:28,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:28,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:28,690 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:28,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 18:09:28,691 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2075915218, now seen corresponding path program 21 times [2022-11-25 18:09:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:28,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259624205] [2022-11-25 18:09:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:28,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:29,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259624205] [2022-11-25 18:09:29,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259624205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:29,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:29,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:09:29,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62660181] [2022-11-25 18:09:29,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:29,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:09:29,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:29,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:09:29,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:09:29,766 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 436 [2022-11-25 18:09:29,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 149 transitions, 2341 flow. Second operand has 11 states, 11 states have (on average 170.72727272727272) internal successors, (1878), 11 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) [2022-11-25 18:09:29,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:29,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 436 [2022-11-25 18:09:29,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:30,485 INFO L130 PetriNetUnfolder]: 500/952 cut-off events. [2022-11-25 18:09:30,485 INFO L131 PetriNetUnfolder]: For 9589/9591 co-relation queries the response was YES. [2022-11-25 18:09:30,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5929 conditions, 952 events. 500/952 cut-off events. For 9589/9591 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4786 event pairs, 122 based on Foata normal form. 1/953 useless extension candidates. Maximal degree in co-relation 5851. Up to 573 conditions per place. [2022-11-25 18:09:30,493 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 147 selfloop transitions, 44 changer transitions 7/199 dead transitions. [2022-11-25 18:09:30,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 199 transitions, 3093 flow [2022-11-25 18:09:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:09:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:09:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2109 transitions. [2022-11-25 18:09:30,503 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40309633027522934 [2022-11-25 18:09:30,503 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2109 transitions. [2022-11-25 18:09:30,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2109 transitions. [2022-11-25 18:09:30,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:30,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2109 transitions. [2022-11-25 18:09:30,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 175.75) internal successors, (2109), 12 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:30,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 436.0) internal successors, (5668), 13 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:30,516 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 436.0) internal successors, (5668), 13 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:30,516 INFO L175 Difference]: Start difference. First operand has 155 places, 149 transitions, 2341 flow. Second operand 12 states and 2109 transitions. [2022-11-25 18:09:30,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 199 transitions, 3093 flow [2022-11-25 18:09:30,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 199 transitions, 2943 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-11-25 18:09:30,574 INFO L231 Difference]: Finished difference. Result has 158 places, 156 transitions, 2435 flow [2022-11-25 18:09:30,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2206, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2435, PETRI_PLACES=158, PETRI_TRANSITIONS=156} [2022-11-25 18:09:30,575 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 132 predicate places. [2022-11-25 18:09:30,575 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 156 transitions, 2435 flow [2022-11-25 18:09:30,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 170.72727272727272) internal successors, (1878), 11 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) [2022-11-25 18:09:30,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:30,576 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:30,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 18:09:30,577 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:30,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:30,577 INFO L85 PathProgramCache]: Analyzing trace with hash -924764398, now seen corresponding path program 22 times [2022-11-25 18:09:30,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:30,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737216853] [2022-11-25 18:09:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:30,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:09:31,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:31,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737216853] [2022-11-25 18:09:31,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737216853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:31,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083246248] [2022-11-25 18:09:31,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:09:31,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:31,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:31,920 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:31,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 18:09:32,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:09:32,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:09:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 18:09:32,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:32,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:09:32,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 18:09:32,536 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-11-25 18:09:32,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 47 [2022-11-25 18:09:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:32,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:09:32,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083246248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:32,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:09:32,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2022-11-25 18:09:32,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444713935] [2022-11-25 18:09:32,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:32,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:09:32,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:09:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:09:33,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 436 [2022-11-25 18:09:33,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 156 transitions, 2435 flow. Second operand has 12 states, 12 states have (on average 167.58333333333334) internal successors, (2011), 12 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:33,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:33,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 436 [2022-11-25 18:09:33,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:34,133 INFO L130 PetriNetUnfolder]: 498/941 cut-off events. [2022-11-25 18:09:34,133 INFO L131 PetriNetUnfolder]: For 9464/9466 co-relation queries the response was YES. [2022-11-25 18:09:34,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5869 conditions, 941 events. 498/941 cut-off events. For 9464/9466 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4665 event pairs, 109 based on Foata normal form. 1/942 useless extension candidates. Maximal degree in co-relation 5779. Up to 407 conditions per place. [2022-11-25 18:09:34,141 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 108 selfloop transitions, 66 changer transitions 7/182 dead transitions. [2022-11-25 18:09:34,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 182 transitions, 2938 flow [2022-11-25 18:09:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:09:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:09:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1723 transitions. [2022-11-25 18:09:34,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3951834862385321 [2022-11-25 18:09:34,150 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1723 transitions. [2022-11-25 18:09:34,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1723 transitions. [2022-11-25 18:09:34,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:34,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1723 transitions. [2022-11-25 18:09:34,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 172.3) internal successors, (1723), 10 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:34,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:09:34,158 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:09:34,158 INFO L175 Difference]: Start difference. First operand has 158 places, 156 transitions, 2435 flow. Second operand 10 states and 1723 transitions. [2022-11-25 18:09:34,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 182 transitions, 2938 flow [2022-11-25 18:09:34,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 182 transitions, 2855 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-11-25 18:09:34,214 INFO L231 Difference]: Finished difference. Result has 158 places, 158 transitions, 2514 flow [2022-11-25 18:09:34,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2514, PETRI_PLACES=158, PETRI_TRANSITIONS=158} [2022-11-25 18:09:34,215 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 132 predicate places. [2022-11-25 18:09:34,215 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 158 transitions, 2514 flow [2022-11-25 18:09:34,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.58333333333334) internal successors, (2011), 12 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:34,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:34,215 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:34,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-25 18:09:34,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:34,422 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash -535090952, now seen corresponding path program 23 times [2022-11-25 18:09:34,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:34,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205619464] [2022-11-25 18:09:34,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:34,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:35,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:35,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205619464] [2022-11-25 18:09:35,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205619464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:35,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:35,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:09:35,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859756564] [2022-11-25 18:09:35,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:35,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:09:35,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:35,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:09:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:09:36,074 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 436 [2022-11-25 18:09:36,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 158 transitions, 2514 flow. Second operand has 12 states, 12 states have (on average 164.58333333333334) internal successors, (1975), 12 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:36,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:36,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 436 [2022-11-25 18:09:36,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:36,823 INFO L130 PetriNetUnfolder]: 496/931 cut-off events. [2022-11-25 18:09:36,823 INFO L131 PetriNetUnfolder]: For 9349/9351 co-relation queries the response was YES. [2022-11-25 18:09:36,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5872 conditions, 931 events. 496/931 cut-off events. For 9349/9351 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4565 event pairs, 105 based on Foata normal form. 1/932 useless extension candidates. Maximal degree in co-relation 5785. Up to 390 conditions per place. [2022-11-25 18:09:36,831 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 108 selfloop transitions, 61 changer transitions 11/181 dead transitions. [2022-11-25 18:09:36,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 181 transitions, 2969 flow [2022-11-25 18:09:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:09:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:09:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1693 transitions. [2022-11-25 18:09:36,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38830275229357797 [2022-11-25 18:09:36,842 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1693 transitions. [2022-11-25 18:09:36,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1693 transitions. [2022-11-25 18:09:36,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:36,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1693 transitions. [2022-11-25 18:09:36,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:36,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:09:36,850 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:09:36,850 INFO L175 Difference]: Start difference. First operand has 158 places, 158 transitions, 2514 flow. Second operand 10 states and 1693 transitions. [2022-11-25 18:09:36,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 181 transitions, 2969 flow [2022-11-25 18:09:36,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 181 transitions, 2833 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-11-25 18:09:36,907 INFO L231 Difference]: Finished difference. Result has 158 places, 155 transitions, 2462 flow [2022-11-25 18:09:36,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2462, PETRI_PLACES=158, PETRI_TRANSITIONS=155} [2022-11-25 18:09:36,913 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 132 predicate places. [2022-11-25 18:09:36,913 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 155 transitions, 2462 flow [2022-11-25 18:09:36,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.58333333333334) internal successors, (1975), 12 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:36,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:36,914 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:36,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 18:09:36,914 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:36,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2042886495, now seen corresponding path program 1 times [2022-11-25 18:09:36,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:36,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836037689] [2022-11-25 18:09:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:36,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:37,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:37,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836037689] [2022-11-25 18:09:37,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836037689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:37,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007437357] [2022-11-25 18:09:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:37,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:37,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:37,349 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:37,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 18:09:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:37,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 18:09:37,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:37,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:09:37,858 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-11-25 18:09:37,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2022-11-25 18:09:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:37,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007437357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:09:37,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:09:37,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 17 [2022-11-25 18:09:37,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434708768] [2022-11-25 18:09:37,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:09:37,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:09:37,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:37,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:09:37,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:09:38,666 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 436 [2022-11-25 18:09:38,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 155 transitions, 2462 flow. Second operand has 17 states, 17 states have (on average 176.35294117647058) internal successors, (2998), 17 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:38,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:38,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 436 [2022-11-25 18:09:38,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:39,355 INFO L130 PetriNetUnfolder]: 496/944 cut-off events. [2022-11-25 18:09:39,355 INFO L131 PetriNetUnfolder]: For 9669/9671 co-relation queries the response was YES. [2022-11-25 18:09:39,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5826 conditions, 944 events. 496/944 cut-off events. For 9669/9671 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4726 event pairs, 97 based on Foata normal form. 6/950 useless extension candidates. Maximal degree in co-relation 5740. Up to 408 conditions per place. [2022-11-25 18:09:39,362 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 121 selfloop transitions, 65 changer transitions 0/187 dead transitions. [2022-11-25 18:09:39,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 187 transitions, 3026 flow [2022-11-25 18:09:39,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:09:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:09:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2167 transitions. [2022-11-25 18:09:39,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4141819571865443 [2022-11-25 18:09:39,366 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2167 transitions. [2022-11-25 18:09:39,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2167 transitions. [2022-11-25 18:09:39,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:39,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2167 transitions. [2022-11-25 18:09:39,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 180.58333333333334) internal successors, (2167), 12 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:39,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 436.0) internal successors, (5668), 13 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:39,374 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 436.0) internal successors, (5668), 13 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:39,374 INFO L175 Difference]: Start difference. First operand has 158 places, 155 transitions, 2462 flow. Second operand 12 states and 2167 transitions. [2022-11-25 18:09:39,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 187 transitions, 3026 flow [2022-11-25 18:09:39,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 187 transitions, 2846 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-11-25 18:09:39,423 INFO L231 Difference]: Finished difference. Result has 154 places, 158 transitions, 2446 flow [2022-11-25 18:09:39,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2446, PETRI_PLACES=154, PETRI_TRANSITIONS=158} [2022-11-25 18:09:39,424 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 128 predicate places. [2022-11-25 18:09:39,424 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 158 transitions, 2446 flow [2022-11-25 18:09:39,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 176.35294117647058) internal successors, (2998), 17 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:39,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:39,425 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:39,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:39,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 18:09:39,631 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:39,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1368369479, now seen corresponding path program 2 times [2022-11-25 18:09:39,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:39,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26510897] [2022-11-25 18:09:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:39,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:40,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:40,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26510897] [2022-11-25 18:09:40,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26510897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:40,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:40,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:09:40,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180191928] [2022-11-25 18:09:40,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:40,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:09:40,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:40,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:09:40,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:09:40,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 436 [2022-11-25 18:09:40,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 158 transitions, 2446 flow. Second operand has 9 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:40,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:40,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 436 [2022-11-25 18:09:40,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:40,730 INFO L130 PetriNetUnfolder]: 502/944 cut-off events. [2022-11-25 18:09:40,731 INFO L131 PetriNetUnfolder]: For 9317/9319 co-relation queries the response was YES. [2022-11-25 18:09:40,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5927 conditions, 944 events. 502/944 cut-off events. For 9317/9319 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4649 event pairs, 105 based on Foata normal form. 6/950 useless extension candidates. Maximal degree in co-relation 5812. Up to 395 conditions per place. [2022-11-25 18:09:40,740 INFO L137 encePairwiseOnDemand]: 426/436 looper letters, 122 selfloop transitions, 63 changer transitions 0/186 dead transitions. [2022-11-25 18:09:40,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 186 transitions, 3016 flow [2022-11-25 18:09:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:09:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:09:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1675 transitions. [2022-11-25 18:09:40,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42686034658511723 [2022-11-25 18:09:40,747 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1675 transitions. [2022-11-25 18:09:40,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1675 transitions. [2022-11-25 18:09:40,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:40,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1675 transitions. [2022-11-25 18:09:40,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 186.11111111111111) internal successors, (1675), 9 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:40,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:40,755 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:40,755 INFO L175 Difference]: Start difference. First operand has 154 places, 158 transitions, 2446 flow. Second operand 9 states and 1675 transitions. [2022-11-25 18:09:40,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 186 transitions, 3016 flow [2022-11-25 18:09:40,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 186 transitions, 2879 flow, removed 12 selfloop flow, removed 5 redundant places. [2022-11-25 18:09:40,795 INFO L231 Difference]: Finished difference. Result has 158 places, 164 transitions, 2547 flow [2022-11-25 18:09:40,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2547, PETRI_PLACES=158, PETRI_TRANSITIONS=164} [2022-11-25 18:09:40,795 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 132 predicate places. [2022-11-25 18:09:40,795 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 164 transitions, 2547 flow [2022-11-25 18:09:40,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:40,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:40,796 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:40,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 18:09:40,796 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash 555467635, now seen corresponding path program 3 times [2022-11-25 18:09:40,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:40,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985048468] [2022-11-25 18:09:40,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:40,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:41,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:41,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985048468] [2022-11-25 18:09:41,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985048468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:41,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:41,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:09:41,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493822480] [2022-11-25 18:09:41,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:41,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:09:41,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:09:41,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:09:41,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 436 [2022-11-25 18:09:41,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 164 transitions, 2547 flow. Second operand has 9 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:41,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:41,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 436 [2022-11-25 18:09:41,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:41,946 INFO L130 PetriNetUnfolder]: 486/912 cut-off events. [2022-11-25 18:09:41,947 INFO L131 PetriNetUnfolder]: For 8951/8953 co-relation queries the response was YES. [2022-11-25 18:09:41,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5781 conditions, 912 events. 486/912 cut-off events. For 8951/8953 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4427 event pairs, 93 based on Foata normal form. 6/918 useless extension candidates. Maximal degree in co-relation 5667. Up to 306 conditions per place. [2022-11-25 18:09:41,954 INFO L137 encePairwiseOnDemand]: 426/436 looper letters, 136 selfloop transitions, 70 changer transitions 2/209 dead transitions. [2022-11-25 18:09:41,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 209 transitions, 3384 flow [2022-11-25 18:09:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:09:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:09:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1684 transitions. [2022-11-25 18:09:41,957 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4291539245667686 [2022-11-25 18:09:41,957 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1684 transitions. [2022-11-25 18:09:41,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1684 transitions. [2022-11-25 18:09:41,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:41,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1684 transitions. [2022-11-25 18:09:41,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 187.11111111111111) internal successors, (1684), 9 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:41,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:41,967 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:41,967 INFO L175 Difference]: Start difference. First operand has 158 places, 164 transitions, 2547 flow. Second operand 9 states and 1684 transitions. [2022-11-25 18:09:41,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 209 transitions, 3384 flow [2022-11-25 18:09:42,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 209 transitions, 3302 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-25 18:09:42,025 INFO L231 Difference]: Finished difference. Result has 164 places, 171 transitions, 2795 flow [2022-11-25 18:09:42,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2795, PETRI_PLACES=164, PETRI_TRANSITIONS=171} [2022-11-25 18:09:42,026 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 138 predicate places. [2022-11-25 18:09:42,026 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 171 transitions, 2795 flow [2022-11-25 18:09:42,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:42,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:42,027 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:42,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-25 18:09:42,027 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash -557004385, now seen corresponding path program 4 times [2022-11-25 18:09:42,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:42,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382423342] [2022-11-25 18:09:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:42,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:42,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382423342] [2022-11-25 18:09:42,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382423342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:42,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:42,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:09:42,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141341087] [2022-11-25 18:09:42,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:42,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:09:42,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:42,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:09:42,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:09:42,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 436 [2022-11-25 18:09:42,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 171 transitions, 2795 flow. Second operand has 9 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:42,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:42,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 436 [2022-11-25 18:09:42,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:43,185 INFO L130 PetriNetUnfolder]: 521/977 cut-off events. [2022-11-25 18:09:43,186 INFO L131 PetriNetUnfolder]: For 11557/11559 co-relation queries the response was YES. [2022-11-25 18:09:43,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6393 conditions, 977 events. 521/977 cut-off events. For 11557/11559 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4850 event pairs, 37 based on Foata normal form. 4/981 useless extension candidates. Maximal degree in co-relation 6277. Up to 427 conditions per place. [2022-11-25 18:09:43,193 INFO L137 encePairwiseOnDemand]: 427/436 looper letters, 186 selfloop transitions, 35 changer transitions 4/226 dead transitions. [2022-11-25 18:09:43,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 226 transitions, 3837 flow [2022-11-25 18:09:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:09:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:09:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1313 transitions. [2022-11-25 18:09:43,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4302096985583224 [2022-11-25 18:09:43,198 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1313 transitions. [2022-11-25 18:09:43,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1313 transitions. [2022-11-25 18:09:43,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:43,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1313 transitions. [2022-11-25 18:09:43,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.57142857142858) internal successors, (1313), 7 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:43,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 436.0) internal successors, (3488), 8 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:43,204 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 436.0) internal successors, (3488), 8 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:43,204 INFO L175 Difference]: Start difference. First operand has 164 places, 171 transitions, 2795 flow. Second operand 7 states and 1313 transitions. [2022-11-25 18:09:43,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 226 transitions, 3837 flow [2022-11-25 18:09:43,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 226 transitions, 3742 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-25 18:09:43,261 INFO L231 Difference]: Finished difference. Result has 167 places, 178 transitions, 2983 flow [2022-11-25 18:09:43,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2983, PETRI_PLACES=167, PETRI_TRANSITIONS=178} [2022-11-25 18:09:43,262 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 141 predicate places. [2022-11-25 18:09:43,262 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 178 transitions, 2983 flow [2022-11-25 18:09:43,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:43,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:43,263 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:43,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 18:09:43,263 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash 434571313, now seen corresponding path program 5 times [2022-11-25 18:09:43,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:43,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758606115] [2022-11-25 18:09:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:43,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758606115] [2022-11-25 18:09:43,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758606115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770445781] [2022-11-25 18:09:43,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:09:43,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:43,639 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:43,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 18:09:43,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 18:09:43,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:09:43,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 18:09:43,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:44,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:09:44,112 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-11-25 18:09:44,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 61 [2022-11-25 18:09:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:44,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770445781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:09:44,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:09:44,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 17 [2022-11-25 18:09:44,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442466293] [2022-11-25 18:09:44,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:09:44,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:09:44,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:44,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:09:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:09:44,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 436 [2022-11-25 18:09:44,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 178 transitions, 2983 flow. Second operand has 17 states, 17 states have (on average 176.35294117647058) internal successors, (2998), 17 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:44,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:44,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 436 [2022-11-25 18:09:44,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:45,523 INFO L130 PetriNetUnfolder]: 510/976 cut-off events. [2022-11-25 18:09:45,523 INFO L131 PetriNetUnfolder]: For 11831/11833 co-relation queries the response was YES. [2022-11-25 18:09:45,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6403 conditions, 976 events. 510/976 cut-off events. For 11831/11833 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4948 event pairs, 104 based on Foata normal form. 6/982 useless extension candidates. Maximal degree in co-relation 6319. Up to 512 conditions per place. [2022-11-25 18:09:45,529 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 124 selfloop transitions, 85 changer transitions 0/210 dead transitions. [2022-11-25 18:09:45,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 210 transitions, 3603 flow [2022-11-25 18:09:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:09:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:09:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1988 transitions. [2022-11-25 18:09:45,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41451209341117595 [2022-11-25 18:09:45,532 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1988 transitions. [2022-11-25 18:09:45,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1988 transitions. [2022-11-25 18:09:45,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:45,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1988 transitions. [2022-11-25 18:09:45,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 180.72727272727272) internal successors, (1988), 11 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:45,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 436.0) internal successors, (5232), 12 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:45,540 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 436.0) internal successors, (5232), 12 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:45,540 INFO L175 Difference]: Start difference. First operand has 167 places, 178 transitions, 2983 flow. Second operand 11 states and 1988 transitions. [2022-11-25 18:09:45,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 210 transitions, 3603 flow [2022-11-25 18:09:45,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 210 transitions, 3509 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-25 18:09:45,606 INFO L231 Difference]: Finished difference. Result has 170 places, 182 transitions, 3121 flow [2022-11-25 18:09:45,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3121, PETRI_PLACES=170, PETRI_TRANSITIONS=182} [2022-11-25 18:09:45,607 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2022-11-25 18:09:45,607 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 182 transitions, 3121 flow [2022-11-25 18:09:45,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 176.35294117647058) internal successors, (2998), 17 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:45,607 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:45,608 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:45,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:45,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 18:09:45,814 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:45,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1632715541, now seen corresponding path program 6 times [2022-11-25 18:09:45,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:45,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958134101] [2022-11-25 18:09:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:45,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:46,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:46,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958134101] [2022-11-25 18:09:46,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958134101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:46,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:46,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:09:46,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991405815] [2022-11-25 18:09:46,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:46,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:09:46,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:09:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:09:46,413 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 436 [2022-11-25 18:09:46,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 182 transitions, 3121 flow. Second operand has 9 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:46,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:46,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 436 [2022-11-25 18:09:46,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:46,956 INFO L130 PetriNetUnfolder]: 494/942 cut-off events. [2022-11-25 18:09:46,956 INFO L131 PetriNetUnfolder]: For 11803/11805 co-relation queries the response was YES. [2022-11-25 18:09:46,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6366 conditions, 942 events. 494/942 cut-off events. For 11803/11805 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4719 event pairs, 109 based on Foata normal form. 4/946 useless extension candidates. Maximal degree in co-relation 6250. Up to 510 conditions per place. [2022-11-25 18:09:46,966 INFO L137 encePairwiseOnDemand]: 427/436 looper letters, 160 selfloop transitions, 50 changer transitions 2/213 dead transitions. [2022-11-25 18:09:46,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 213 transitions, 3749 flow [2022-11-25 18:09:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:09:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:09:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1495 transitions. [2022-11-25 18:09:46,969 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4286123853211009 [2022-11-25 18:09:46,970 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1495 transitions. [2022-11-25 18:09:46,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1495 transitions. [2022-11-25 18:09:46,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:46,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1495 transitions. [2022-11-25 18:09:46,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:46,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:46,975 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 436.0) internal successors, (3924), 9 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:46,976 INFO L175 Difference]: Start difference. First operand has 170 places, 182 transitions, 3121 flow. Second operand 8 states and 1495 transitions. [2022-11-25 18:09:46,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 213 transitions, 3749 flow [2022-11-25 18:09:47,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 213 transitions, 3680 flow, removed 16 selfloop flow, removed 8 redundant places. [2022-11-25 18:09:47,041 INFO L231 Difference]: Finished difference. Result has 170 places, 178 transitions, 3117 flow [2022-11-25 18:09:47,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=3014, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3117, PETRI_PLACES=170, PETRI_TRANSITIONS=178} [2022-11-25 18:09:47,042 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2022-11-25 18:09:47,042 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 178 transitions, 3117 flow [2022-11-25 18:09:47,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:47,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:47,043 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-25 18:09:47,044 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:47,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2088340239, now seen corresponding path program 7 times [2022-11-25 18:09:47,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:47,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013583016] [2022-11-25 18:09:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:47,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:47,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:47,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013583016] [2022-11-25 18:09:47,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013583016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:47,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:47,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:09:47,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981686294] [2022-11-25 18:09:47,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:47,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:09:47,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:47,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:09:47,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:09:47,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 436 [2022-11-25 18:09:47,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 178 transitions, 3117 flow. Second operand has 9 states, 9 states have (on average 177.22222222222223) internal successors, (1595), 9 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:47,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:47,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 436 [2022-11-25 18:09:47,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:48,283 INFO L130 PetriNetUnfolder]: 474/900 cut-off events. [2022-11-25 18:09:48,283 INFO L131 PetriNetUnfolder]: For 11147/11149 co-relation queries the response was YES. [2022-11-25 18:09:48,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6111 conditions, 900 events. 474/900 cut-off events. For 11147/11149 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4420 event pairs, 85 based on Foata normal form. 6/906 useless extension candidates. Maximal degree in co-relation 5998. Up to 303 conditions per place. [2022-11-25 18:09:48,289 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 101 selfloop transitions, 87 changer transitions 2/191 dead transitions. [2022-11-25 18:09:48,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 191 transitions, 3529 flow [2022-11-25 18:09:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:09:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:09:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1639 transitions. [2022-11-25 18:09:48,291 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41768603465851173 [2022-11-25 18:09:48,291 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1639 transitions. [2022-11-25 18:09:48,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1639 transitions. [2022-11-25 18:09:48,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:48,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1639 transitions. [2022-11-25 18:09:48,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.11111111111111) internal successors, (1639), 9 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:48,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:48,295 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:48,295 INFO L175 Difference]: Start difference. First operand has 170 places, 178 transitions, 3117 flow. Second operand 9 states and 1639 transitions. [2022-11-25 18:09:48,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 191 transitions, 3529 flow [2022-11-25 18:09:48,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 191 transitions, 3309 flow, removed 23 selfloop flow, removed 12 redundant places. [2022-11-25 18:09:48,332 INFO L231 Difference]: Finished difference. Result has 164 places, 173 transitions, 3019 flow [2022-11-25 18:09:48,333 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2856, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3019, PETRI_PLACES=164, PETRI_TRANSITIONS=173} [2022-11-25 18:09:48,333 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 138 predicate places. [2022-11-25 18:09:48,333 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 173 transitions, 3019 flow [2022-11-25 18:09:48,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 177.22222222222223) internal successors, (1595), 9 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:48,333 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:48,333 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-25 18:09:48,334 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1330503600, now seen corresponding path program 1 times [2022-11-25 18:09:48,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:48,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055836523] [2022-11-25 18:09:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:48,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:49,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:49,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055836523] [2022-11-25 18:09:49,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055836523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:49,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:49,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:09:49,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879019111] [2022-11-25 18:09:49,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:49,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:09:49,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:49,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:09:49,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:09:49,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 436 [2022-11-25 18:09:49,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 173 transitions, 3019 flow. Second operand has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:49,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:49,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 436 [2022-11-25 18:09:49,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:50,897 INFO L130 PetriNetUnfolder]: 793/1418 cut-off events. [2022-11-25 18:09:50,897 INFO L131 PetriNetUnfolder]: For 14390/14390 co-relation queries the response was YES. [2022-11-25 18:09:50,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8650 conditions, 1418 events. 793/1418 cut-off events. For 14390/14390 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7273 event pairs, 160 based on Foata normal form. 3/1421 useless extension candidates. Maximal degree in co-relation 8542. Up to 388 conditions per place. [2022-11-25 18:09:50,907 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 192 selfloop transitions, 101 changer transitions 7/300 dead transitions. [2022-11-25 18:09:50,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 300 transitions, 4674 flow [2022-11-25 18:09:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 18:09:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 18:09:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2963 transitions. [2022-11-25 18:09:50,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3997571505666487 [2022-11-25 18:09:50,912 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2963 transitions. [2022-11-25 18:09:50,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2963 transitions. [2022-11-25 18:09:50,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:50,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2963 transitions. [2022-11-25 18:09:50,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 174.2941176470588) internal successors, (2963), 17 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:50,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 436.0) internal successors, (7848), 18 states have internal predecessors, (7848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:50,925 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 436.0) internal successors, (7848), 18 states have internal predecessors, (7848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:50,925 INFO L175 Difference]: Start difference. First operand has 164 places, 173 transitions, 3019 flow. Second operand 17 states and 2963 transitions. [2022-11-25 18:09:50,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 300 transitions, 4674 flow [2022-11-25 18:09:50,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 300 transitions, 4495 flow, removed 8 selfloop flow, removed 8 redundant places. [2022-11-25 18:09:50,990 INFO L231 Difference]: Finished difference. Result has 177 places, 206 transitions, 3593 flow [2022-11-25 18:09:50,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=2862, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3593, PETRI_PLACES=177, PETRI_TRANSITIONS=206} [2022-11-25 18:09:50,991 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 151 predicate places. [2022-11-25 18:09:50,991 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 206 transitions, 3593 flow [2022-11-25 18:09:50,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:50,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:50,992 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:50,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-25 18:09:50,993 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash 847572488, now seen corresponding path program 2 times [2022-11-25 18:09:50,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:50,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493080825] [2022-11-25 18:09:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:50,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:51,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493080825] [2022-11-25 18:09:51,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493080825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:51,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:51,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:09:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025922900] [2022-11-25 18:09:51,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:09:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:09:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:09:52,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:09:52,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 206 transitions, 3593 flow. Second operand has 12 states, 12 states have (on average 169.66666666666666) internal successors, (2036), 12 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:52,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:52,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:09:52,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:53,291 INFO L130 PetriNetUnfolder]: 792/1475 cut-off events. [2022-11-25 18:09:53,291 INFO L131 PetriNetUnfolder]: For 15469/15469 co-relation queries the response was YES. [2022-11-25 18:09:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9287 conditions, 1475 events. 792/1475 cut-off events. For 15469/15469 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7749 event pairs, 77 based on Foata normal form. 2/1476 useless extension candidates. Maximal degree in co-relation 9179. Up to 239 conditions per place. [2022-11-25 18:09:53,301 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 191 selfloop transitions, 135 changer transitions 10/338 dead transitions. [2022-11-25 18:09:53,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 338 transitions, 5224 flow [2022-11-25 18:09:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:09:53,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:09:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3521 transitions. [2022-11-25 18:09:53,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4037844036697248 [2022-11-25 18:09:53,305 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3521 transitions. [2022-11-25 18:09:53,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3521 transitions. [2022-11-25 18:09:53,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:53,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3521 transitions. [2022-11-25 18:09:53,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 176.05) internal successors, (3521), 20 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:53,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 436.0) internal successors, (9156), 21 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:53,319 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 436.0) internal successors, (9156), 21 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:53,320 INFO L175 Difference]: Start difference. First operand has 177 places, 206 transitions, 3593 flow. Second operand 20 states and 3521 transitions. [2022-11-25 18:09:53,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 338 transitions, 5224 flow [2022-11-25 18:09:53,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 338 transitions, 5167 flow, removed 28 selfloop flow, removed 3 redundant places. [2022-11-25 18:09:53,395 INFO L231 Difference]: Finished difference. Result has 198 places, 230 transitions, 4221 flow [2022-11-25 18:09:53,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4221, PETRI_PLACES=198, PETRI_TRANSITIONS=230} [2022-11-25 18:09:53,396 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 172 predicate places. [2022-11-25 18:09:53,396 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 230 transitions, 4221 flow [2022-11-25 18:09:53,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.66666666666666) internal successors, (2036), 12 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:53,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:53,397 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:53,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-25 18:09:53,397 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:53,397 INFO L85 PathProgramCache]: Analyzing trace with hash -86058450, now seen corresponding path program 3 times [2022-11-25 18:09:53,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:53,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885589301] [2022-11-25 18:09:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:53,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:54,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:54,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885589301] [2022-11-25 18:09:54,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885589301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:54,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:54,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:09:54,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107793453] [2022-11-25 18:09:54,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:54,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:09:54,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:54,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:09:54,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:09:54,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 436 [2022-11-25 18:09:54,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 230 transitions, 4221 flow. Second operand has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:54,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:54,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 436 [2022-11-25 18:09:54,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:56,617 INFO L130 PetriNetUnfolder]: 1191/2085 cut-off events. [2022-11-25 18:09:56,618 INFO L131 PetriNetUnfolder]: For 22507/22507 co-relation queries the response was YES. [2022-11-25 18:09:56,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13188 conditions, 2085 events. 1191/2085 cut-off events. For 22507/22507 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10762 event pairs, 133 based on Foata normal form. 4/2089 useless extension candidates. Maximal degree in co-relation 13068. Up to 369 conditions per place. [2022-11-25 18:09:56,633 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 226 selfloop transitions, 170 changer transitions 7/403 dead transitions. [2022-11-25 18:09:56,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 403 transitions, 6276 flow [2022-11-25 18:09:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 18:09:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 18:09:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4366 transitions. [2022-11-25 18:09:56,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4005504587155963 [2022-11-25 18:09:56,637 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4366 transitions. [2022-11-25 18:09:56,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4366 transitions. [2022-11-25 18:09:56,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:56,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4366 transitions. [2022-11-25 18:09:56,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 174.64) internal successors, (4366), 25 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:56,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 436.0) internal successors, (11336), 26 states have internal predecessors, (11336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:56,653 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 436.0) internal successors, (11336), 26 states have internal predecessors, (11336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:56,653 INFO L175 Difference]: Start difference. First operand has 198 places, 230 transitions, 4221 flow. Second operand 25 states and 4366 transitions. [2022-11-25 18:09:56,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 403 transitions, 6276 flow [2022-11-25 18:09:56,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 403 transitions, 5955 flow, removed 42 selfloop flow, removed 11 redundant places. [2022-11-25 18:09:56,780 INFO L231 Difference]: Finished difference. Result has 216 places, 263 transitions, 4818 flow [2022-11-25 18:09:56,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=3963, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4818, PETRI_PLACES=216, PETRI_TRANSITIONS=263} [2022-11-25 18:09:56,781 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 190 predicate places. [2022-11-25 18:09:56,781 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 263 transitions, 4818 flow [2022-11-25 18:09:56,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:56,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:56,782 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:56,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-25 18:09:56,782 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:09:56,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:56,783 INFO L85 PathProgramCache]: Analyzing trace with hash -271524044, now seen corresponding path program 4 times [2022-11-25 18:09:56,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:56,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979153678] [2022-11-25 18:09:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:56,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:09:57,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:57,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979153678] [2022-11-25 18:09:57,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979153678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:09:57,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:09:57,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:09:57,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038740751] [2022-11-25 18:09:57,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:09:57,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:09:57,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:57,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:09:57,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:09:58,551 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 436 [2022-11-25 18:09:58,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 263 transitions, 4818 flow. Second operand has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:58,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:58,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 436 [2022-11-25 18:09:58,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:00,093 INFO L130 PetriNetUnfolder]: 1398/2461 cut-off events. [2022-11-25 18:10:00,094 INFO L131 PetriNetUnfolder]: For 27416/27416 co-relation queries the response was YES. [2022-11-25 18:10:00,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16119 conditions, 2461 events. 1398/2461 cut-off events. For 27416/27416 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 13382 event pairs, 224 based on Foata normal form. 4/2465 useless extension candidates. Maximal degree in co-relation 15995. Up to 715 conditions per place. [2022-11-25 18:10:00,111 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 241 selfloop transitions, 179 changer transitions 7/427 dead transitions. [2022-11-25 18:10:00,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 427 transitions, 7077 flow [2022-11-25 18:10:00,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 18:10:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 18:10:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4525 transitions. [2022-11-25 18:10:00,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39917078334509526 [2022-11-25 18:10:00,117 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4525 transitions. [2022-11-25 18:10:00,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4525 transitions. [2022-11-25 18:10:00,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:00,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4525 transitions. [2022-11-25 18:10:00,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 174.03846153846155) internal successors, (4525), 26 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:00,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 436.0) internal successors, (11772), 27 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:00,133 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 436.0) internal successors, (11772), 27 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:00,133 INFO L175 Difference]: Start difference. First operand has 216 places, 263 transitions, 4818 flow. Second operand 26 states and 4525 transitions. [2022-11-25 18:10:00,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 427 transitions, 7077 flow [2022-11-25 18:10:00,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 427 transitions, 6679 flow, removed 19 selfloop flow, removed 18 redundant places. [2022-11-25 18:10:00,242 INFO L231 Difference]: Finished difference. Result has 233 places, 306 transitions, 5672 flow [2022-11-25 18:10:00,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5672, PETRI_PLACES=233, PETRI_TRANSITIONS=306} [2022-11-25 18:10:00,243 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 207 predicate places. [2022-11-25 18:10:00,244 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 306 transitions, 5672 flow [2022-11-25 18:10:00,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:00,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:00,244 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:00,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-25 18:10:00,245 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:00,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1990171720, now seen corresponding path program 5 times [2022-11-25 18:10:00,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:00,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223101028] [2022-11-25 18:10:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:00,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:00,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:00,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223101028] [2022-11-25 18:10:00,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223101028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:00,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:00,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:10:00,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140322609] [2022-11-25 18:10:00,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:00,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:10:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:00,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:10:00,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:10:01,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 436 [2022-11-25 18:10:01,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 306 transitions, 5672 flow. Second operand has 12 states, 12 states have (on average 168.75) internal successors, (2025), 12 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:01,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:01,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 436 [2022-11-25 18:10:01,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:02,798 INFO L130 PetriNetUnfolder]: 1548/2818 cut-off events. [2022-11-25 18:10:02,799 INFO L131 PetriNetUnfolder]: For 34132/34132 co-relation queries the response was YES. [2022-11-25 18:10:02,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18728 conditions, 2818 events. 1548/2818 cut-off events. For 34132/34132 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16432 event pairs, 82 based on Foata normal form. 2/2820 useless extension candidates. Maximal degree in co-relation 18593. Up to 765 conditions per place. [2022-11-25 18:10:02,820 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 220 selfloop transitions, 221 changer transitions 6/447 dead transitions. [2022-11-25 18:10:02,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 447 transitions, 8259 flow [2022-11-25 18:10:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:10:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:10:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3484 transitions. [2022-11-25 18:10:02,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3995412844036697 [2022-11-25 18:10:02,824 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3484 transitions. [2022-11-25 18:10:02,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3484 transitions. [2022-11-25 18:10:02,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:02,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3484 transitions. [2022-11-25 18:10:02,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 174.2) internal successors, (3484), 20 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:02,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 436.0) internal successors, (9156), 21 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:02,835 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 436.0) internal successors, (9156), 21 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:02,835 INFO L175 Difference]: Start difference. First operand has 233 places, 306 transitions, 5672 flow. Second operand 20 states and 3484 transitions. [2022-11-25 18:10:02,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 447 transitions, 8259 flow [2022-11-25 18:10:03,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 447 transitions, 8080 flow, removed 40 selfloop flow, removed 5 redundant places. [2022-11-25 18:10:03,020 INFO L231 Difference]: Finished difference. Result has 258 places, 367 transitions, 7352 flow [2022-11-25 18:10:03,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7352, PETRI_PLACES=258, PETRI_TRANSITIONS=367} [2022-11-25 18:10:03,021 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 232 predicate places. [2022-11-25 18:10:03,021 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 367 transitions, 7352 flow [2022-11-25 18:10:03,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 168.75) internal successors, (2025), 12 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:03,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:03,021 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:03,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-25 18:10:03,022 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:03,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:03,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1438190648, now seen corresponding path program 6 times [2022-11-25 18:10:03,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:03,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922994544] [2022-11-25 18:10:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:03,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:03,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:03,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922994544] [2022-11-25 18:10:03,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922994544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:03,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:03,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:10:03,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539672642] [2022-11-25 18:10:03,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:03,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:03,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:03,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:03,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:10:04,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 436 [2022-11-25 18:10:04,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 367 transitions, 7352 flow. Second operand has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:04,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:04,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 436 [2022-11-25 18:10:04,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:06,437 INFO L130 PetriNetUnfolder]: 1597/2916 cut-off events. [2022-11-25 18:10:06,437 INFO L131 PetriNetUnfolder]: For 38677/38677 co-relation queries the response was YES. [2022-11-25 18:10:06,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20982 conditions, 2916 events. 1597/2916 cut-off events. For 38677/38677 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 17176 event pairs, 248 based on Foata normal form. 1/2917 useless extension candidates. Maximal degree in co-relation 20835. Up to 1078 conditions per place. [2022-11-25 18:10:06,459 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 264 selfloop transitions, 208 changer transitions 5/477 dead transitions. [2022-11-25 18:10:06,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 477 transitions, 9101 flow [2022-11-25 18:10:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 18:10:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 18:10:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4694 transitions. [2022-11-25 18:10:06,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39874277947672443 [2022-11-25 18:10:06,465 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4694 transitions. [2022-11-25 18:10:06,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4694 transitions. [2022-11-25 18:10:06,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:06,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4694 transitions. [2022-11-25 18:10:06,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 173.85185185185185) internal successors, (4694), 27 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:06,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 436.0) internal successors, (12208), 28 states have internal predecessors, (12208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:06,476 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 436.0) internal successors, (12208), 28 states have internal predecessors, (12208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:06,476 INFO L175 Difference]: Start difference. First operand has 258 places, 367 transitions, 7352 flow. Second operand 27 states and 4694 transitions. [2022-11-25 18:10:06,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 477 transitions, 9101 flow [2022-11-25 18:10:06,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 477 transitions, 8919 flow, removed 46 selfloop flow, removed 6 redundant places. [2022-11-25 18:10:06,653 INFO L231 Difference]: Finished difference. Result has 281 places, 378 transitions, 7838 flow [2022-11-25 18:10:06,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=7182, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7838, PETRI_PLACES=281, PETRI_TRANSITIONS=378} [2022-11-25 18:10:06,654 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 255 predicate places. [2022-11-25 18:10:06,654 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 378 transitions, 7838 flow [2022-11-25 18:10:06,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:06,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:06,655 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:06,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-25 18:10:06,655 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1435140518, now seen corresponding path program 7 times [2022-11-25 18:10:06,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:06,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250269405] [2022-11-25 18:10:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:06,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:07,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:07,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250269405] [2022-11-25 18:10:07,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250269405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:07,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:07,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:10:07,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556963734] [2022-11-25 18:10:07,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:07,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:10:07,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:07,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:10:07,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:10:07,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 436 [2022-11-25 18:10:07,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 378 transitions, 7838 flow. Second operand has 12 states, 12 states have (on average 166.75) internal successors, (2001), 12 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:07,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:07,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 436 [2022-11-25 18:10:07,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:09,591 INFO L130 PetriNetUnfolder]: 1648/3020 cut-off events. [2022-11-25 18:10:09,591 INFO L131 PetriNetUnfolder]: For 43859/43859 co-relation queries the response was YES. [2022-11-25 18:10:09,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22188 conditions, 3020 events. 1648/3020 cut-off events. For 43859/43859 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18090 event pairs, 218 based on Foata normal form. 10/3030 useless extension candidates. Maximal degree in co-relation 22037. Up to 1054 conditions per place. [2022-11-25 18:10:09,619 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 245 selfloop transitions, 221 changer transitions 8/474 dead transitions. [2022-11-25 18:10:09,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 474 transitions, 9616 flow [2022-11-25 18:10:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:10:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 18:10:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3791 transitions. [2022-11-25 18:10:09,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3952251876563803 [2022-11-25 18:10:09,624 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3791 transitions. [2022-11-25 18:10:09,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3791 transitions. [2022-11-25 18:10:09,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:09,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3791 transitions. [2022-11-25 18:10:09,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 172.3181818181818) internal successors, (3791), 22 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:09,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 436.0) internal successors, (10028), 23 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:09,637 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 436.0) internal successors, (10028), 23 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:09,638 INFO L175 Difference]: Start difference. First operand has 281 places, 378 transitions, 7838 flow. Second operand 22 states and 3791 transitions. [2022-11-25 18:10:09,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 474 transitions, 9616 flow [2022-11-25 18:10:09,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 474 transitions, 9238 flow, removed 28 selfloop flow, removed 17 redundant places. [2022-11-25 18:10:09,844 INFO L231 Difference]: Finished difference. Result has 289 places, 391 transitions, 8219 flow [2022-11-25 18:10:09,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=7449, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8219, PETRI_PLACES=289, PETRI_TRANSITIONS=391} [2022-11-25 18:10:09,844 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 263 predicate places. [2022-11-25 18:10:09,844 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 391 transitions, 8219 flow [2022-11-25 18:10:09,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.75) internal successors, (2001), 12 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:09,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:09,845 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:09,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-25 18:10:09,845 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:09,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1145038006, now seen corresponding path program 8 times [2022-11-25 18:10:09,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:09,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967239880] [2022-11-25 18:10:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:09,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:10,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:10,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967239880] [2022-11-25 18:10:10,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967239880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:10,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:10,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:10:10,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296387572] [2022-11-25 18:10:10,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:10,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:10:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:10,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:10:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:10:11,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:10:11,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 391 transitions, 8219 flow. Second operand has 12 states, 12 states have (on average 169.66666666666666) internal successors, (2036), 12 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:11,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:11,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:10:11,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:12,803 INFO L130 PetriNetUnfolder]: 1510/2889 cut-off events. [2022-11-25 18:10:12,803 INFO L131 PetriNetUnfolder]: For 46629/46636 co-relation queries the response was YES. [2022-11-25 18:10:12,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21797 conditions, 2889 events. 1510/2889 cut-off events. For 46629/46636 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18098 event pairs, 73 based on Foata normal form. 4/2892 useless extension candidates. Maximal degree in co-relation 21641. Up to 601 conditions per place. [2022-11-25 18:10:12,832 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 229 selfloop transitions, 277 changer transitions 9/522 dead transitions. [2022-11-25 18:10:12,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 522 transitions, 10281 flow [2022-11-25 18:10:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 18:10:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 18:10:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4560 transitions. [2022-11-25 18:10:12,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40225829216654907 [2022-11-25 18:10:12,844 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4560 transitions. [2022-11-25 18:10:12,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4560 transitions. [2022-11-25 18:10:12,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:12,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4560 transitions. [2022-11-25 18:10:12,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 175.3846153846154) internal successors, (4560), 26 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:12,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 436.0) internal successors, (11772), 27 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:12,861 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 436.0) internal successors, (11772), 27 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:12,861 INFO L175 Difference]: Start difference. First operand has 289 places, 391 transitions, 8219 flow. Second operand 26 states and 4560 transitions. [2022-11-25 18:10:12,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 522 transitions, 10281 flow [2022-11-25 18:10:13,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 522 transitions, 9973 flow, removed 29 selfloop flow, removed 16 redundant places. [2022-11-25 18:10:13,187 INFO L231 Difference]: Finished difference. Result has 301 places, 415 transitions, 8987 flow [2022-11-25 18:10:13,188 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=7936, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8987, PETRI_PLACES=301, PETRI_TRANSITIONS=415} [2022-11-25 18:10:13,189 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 275 predicate places. [2022-11-25 18:10:13,189 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 415 transitions, 8987 flow [2022-11-25 18:10:13,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.66666666666666) internal successors, (2036), 12 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:13,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:13,190 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:13,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-25 18:10:13,190 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash -735438352, now seen corresponding path program 9 times [2022-11-25 18:10:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:13,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357792363] [2022-11-25 18:10:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:13,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:13,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357792363] [2022-11-25 18:10:13,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357792363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:13,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:13,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:10:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477395769] [2022-11-25 18:10:13,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:13,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:13,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:13,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:13,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:10:14,317 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:10:14,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 415 transitions, 8987 flow. Second operand has 13 states, 13 states have (on average 169.6153846153846) internal successors, (2205), 13 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:14,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:14,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:10:14,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:15,868 INFO L130 PetriNetUnfolder]: 1504/2870 cut-off events. [2022-11-25 18:10:15,869 INFO L131 PetriNetUnfolder]: For 50670/50677 co-relation queries the response was YES. [2022-11-25 18:10:15,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22679 conditions, 2870 events. 1504/2870 cut-off events. For 50670/50677 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17869 event pairs, 84 based on Foata normal form. 3/2872 useless extension candidates. Maximal degree in co-relation 22521. Up to 811 conditions per place. [2022-11-25 18:10:15,893 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 226 selfloop transitions, 253 changer transitions 5/491 dead transitions. [2022-11-25 18:10:15,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 491 transitions, 10456 flow [2022-11-25 18:10:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 18:10:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 18:10:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3672 transitions. [2022-11-25 18:10:15,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40104849279161203 [2022-11-25 18:10:15,900 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3672 transitions. [2022-11-25 18:10:15,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3672 transitions. [2022-11-25 18:10:15,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:15,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3672 transitions. [2022-11-25 18:10:15,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 174.85714285714286) internal successors, (3672), 21 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:15,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:15,913 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:15,913 INFO L175 Difference]: Start difference. First operand has 301 places, 415 transitions, 8987 flow. Second operand 21 states and 3672 transitions. [2022-11-25 18:10:15,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 491 transitions, 10456 flow [2022-11-25 18:10:16,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 491 transitions, 9983 flow, removed 29 selfloop flow, removed 17 redundant places. [2022-11-25 18:10:16,260 INFO L231 Difference]: Finished difference. Result has 304 places, 414 transitions, 9018 flow [2022-11-25 18:10:16,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=8526, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9018, PETRI_PLACES=304, PETRI_TRANSITIONS=414} [2022-11-25 18:10:16,261 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 278 predicate places. [2022-11-25 18:10:16,261 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 414 transitions, 9018 flow [2022-11-25 18:10:16,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.6153846153846) internal successors, (2205), 13 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:16,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:16,262 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:16,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-25 18:10:16,262 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1289468128, now seen corresponding path program 10 times [2022-11-25 18:10:16,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:16,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403471595] [2022-11-25 18:10:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:16,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:16,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:16,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403471595] [2022-11-25 18:10:16,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403471595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:16,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:16,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:10:16,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505117067] [2022-11-25 18:10:16,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:16,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:16,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:16,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:10:17,846 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 436 [2022-11-25 18:10:17,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 414 transitions, 9018 flow. Second operand has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:17,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:17,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 436 [2022-11-25 18:10:17,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:19,523 INFO L130 PetriNetUnfolder]: 1763/3238 cut-off events. [2022-11-25 18:10:19,523 INFO L131 PetriNetUnfolder]: For 56323/56323 co-relation queries the response was YES. [2022-11-25 18:10:19,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25597 conditions, 3238 events. 1763/3238 cut-off events. For 56323/56323 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 19763 event pairs, 254 based on Foata normal form. 1/3239 useless extension candidates. Maximal degree in co-relation 25439. Up to 1304 conditions per place. [2022-11-25 18:10:19,558 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 288 selfloop transitions, 202 changer transitions 5/495 dead transitions. [2022-11-25 18:10:19,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 495 transitions, 10745 flow [2022-11-25 18:10:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:10:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:10:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3487 transitions. [2022-11-25 18:10:19,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39988532110091746 [2022-11-25 18:10:19,563 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3487 transitions. [2022-11-25 18:10:19,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3487 transitions. [2022-11-25 18:10:19,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:19,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3487 transitions. [2022-11-25 18:10:19,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 174.35) internal successors, (3487), 20 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:19,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 436.0) internal successors, (9156), 21 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:19,576 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 436.0) internal successors, (9156), 21 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:19,576 INFO L175 Difference]: Start difference. First operand has 304 places, 414 transitions, 9018 flow. Second operand 20 states and 3487 transitions. [2022-11-25 18:10:19,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 495 transitions, 10745 flow [2022-11-25 18:10:19,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 495 transitions, 10207 flow, removed 4 selfloop flow, removed 21 redundant places. [2022-11-25 18:10:19,971 INFO L231 Difference]: Finished difference. Result has 309 places, 433 transitions, 9362 flow [2022-11-25 18:10:19,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=8504, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9362, PETRI_PLACES=309, PETRI_TRANSITIONS=433} [2022-11-25 18:10:19,971 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 283 predicate places. [2022-11-25 18:10:19,972 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 433 transitions, 9362 flow [2022-11-25 18:10:19,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:19,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:19,972 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:19,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-25 18:10:19,972 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash 638486024, now seen corresponding path program 11 times [2022-11-25 18:10:19,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:19,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697329251] [2022-11-25 18:10:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:19,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:20,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:20,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697329251] [2022-11-25 18:10:20,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697329251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:20,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:20,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:10:20,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769975423] [2022-11-25 18:10:20,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:20,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:20,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:20,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:20,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:10:21,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 436 [2022-11-25 18:10:21,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 433 transitions, 9362 flow. Second operand has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:21,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:21,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 436 [2022-11-25 18:10:21,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:23,399 INFO L130 PetriNetUnfolder]: 1768/3261 cut-off events. [2022-11-25 18:10:23,399 INFO L131 PetriNetUnfolder]: For 57634/57634 co-relation queries the response was YES. [2022-11-25 18:10:23,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25723 conditions, 3261 events. 1768/3261 cut-off events. For 57634/57634 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 20172 event pairs, 257 based on Foata normal form. 1/3262 useless extension candidates. Maximal degree in co-relation 25559. Up to 1155 conditions per place. [2022-11-25 18:10:23,434 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 300 selfloop transitions, 178 changer transitions 5/483 dead transitions. [2022-11-25 18:10:23,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 483 transitions, 10788 flow [2022-11-25 18:10:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:10:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:10:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2098 transitions. [2022-11-25 18:10:23,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4009938837920489 [2022-11-25 18:10:23,437 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2098 transitions. [2022-11-25 18:10:23,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2098 transitions. [2022-11-25 18:10:23,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:23,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2098 transitions. [2022-11-25 18:10:23,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 174.83333333333334) internal successors, (2098), 12 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:23,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 436.0) internal successors, (5668), 13 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:23,444 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 436.0) internal successors, (5668), 13 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:23,444 INFO L175 Difference]: Start difference. First operand has 309 places, 433 transitions, 9362 flow. Second operand 12 states and 2098 transitions. [2022-11-25 18:10:23,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 483 transitions, 10788 flow [2022-11-25 18:10:23,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 483 transitions, 10516 flow, removed 46 selfloop flow, removed 8 redundant places. [2022-11-25 18:10:23,717 INFO L231 Difference]: Finished difference. Result has 314 places, 439 transitions, 9629 flow [2022-11-25 18:10:23,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=9108, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9629, PETRI_PLACES=314, PETRI_TRANSITIONS=439} [2022-11-25 18:10:23,718 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 288 predicate places. [2022-11-25 18:10:23,718 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 439 transitions, 9629 flow [2022-11-25 18:10:23,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:23,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:23,719 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:23,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-25 18:10:23,720 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash -739511006, now seen corresponding path program 12 times [2022-11-25 18:10:23,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:23,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771681792] [2022-11-25 18:10:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:23,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:10:24,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:24,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771681792] [2022-11-25 18:10:24,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771681792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:24,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343653544] [2022-11-25 18:10:24,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:10:24,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:24,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:24,834 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:24,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 18:10:25,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 18:10:25,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:10:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 18:10:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:25,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:10:25,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 51 [2022-11-25 18:10:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:25,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:10:25,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343653544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:25,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:10:25,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [17] total 24 [2022-11-25 18:10:25,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522765410] [2022-11-25 18:10:25,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:25,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:10:25,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:10:25,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:10:26,014 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 436 [2022-11-25 18:10:26,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 439 transitions, 9629 flow. Second operand has 11 states, 11 states have (on average 170.9090909090909) internal successors, (1880), 11 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:26,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:26,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 436 [2022-11-25 18:10:26,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:27,595 INFO L130 PetriNetUnfolder]: 1808/3375 cut-off events. [2022-11-25 18:10:27,595 INFO L131 PetriNetUnfolder]: For 61400/61400 co-relation queries the response was YES. [2022-11-25 18:10:27,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26539 conditions, 3375 events. 1808/3375 cut-off events. For 61400/61400 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21311 event pairs, 673 based on Foata normal form. 3/3378 useless extension candidates. Maximal degree in co-relation 26372. Up to 2288 conditions per place. [2022-11-25 18:10:27,627 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 364 selfloop transitions, 130 changer transitions 7/501 dead transitions. [2022-11-25 18:10:27,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 501 transitions, 11364 flow [2022-11-25 18:10:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:10:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:10:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1773 transitions. [2022-11-25 18:10:27,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.406651376146789 [2022-11-25 18:10:27,630 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1773 transitions. [2022-11-25 18:10:27,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1773 transitions. [2022-11-25 18:10:27,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:27,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1773 transitions. [2022-11-25 18:10:27,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 177.3) internal successors, (1773), 10 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:27,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:10:27,637 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:10:27,637 INFO L175 Difference]: Start difference. First operand has 314 places, 439 transitions, 9629 flow. Second operand 10 states and 1773 transitions. [2022-11-25 18:10:27,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 501 transitions, 11364 flow [2022-11-25 18:10:27,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 501 transitions, 11045 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-11-25 18:10:27,941 INFO L231 Difference]: Finished difference. Result has 319 places, 466 transitions, 10212 flow [2022-11-25 18:10:27,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=9339, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10212, PETRI_PLACES=319, PETRI_TRANSITIONS=466} [2022-11-25 18:10:27,942 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 293 predicate places. [2022-11-25 18:10:27,942 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 466 transitions, 10212 flow [2022-11-25 18:10:27,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 170.9090909090909) internal successors, (1880), 11 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:27,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:27,943 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:27,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-25 18:10:28,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:28,149 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:28,150 INFO L85 PathProgramCache]: Analyzing trace with hash 127093922, now seen corresponding path program 13 times [2022-11-25 18:10:28,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:28,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453120146] [2022-11-25 18:10:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:28,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:10:29,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453120146] [2022-11-25 18:10:29,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453120146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777538288] [2022-11-25 18:10:29,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:10:29,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:29,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:29,313 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:29,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 18:10:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:29,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 18:10:29,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:29,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:10:29,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777538288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:29,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:10:29,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 24 [2022-11-25 18:10:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408587784] [2022-11-25 18:10:29,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:29,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:29,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:29,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:10:30,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 436 [2022-11-25 18:10:30,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 466 transitions, 10212 flow. Second operand has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:30,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:30,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 436 [2022-11-25 18:10:30,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:32,317 INFO L130 PetriNetUnfolder]: 1803/3354 cut-off events. [2022-11-25 18:10:32,317 INFO L131 PetriNetUnfolder]: For 59267/59267 co-relation queries the response was YES. [2022-11-25 18:10:32,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26287 conditions, 3354 events. 1803/3354 cut-off events. For 59267/59267 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 20935 event pairs, 700 based on Foata normal form. 3/3357 useless extension candidates. Maximal degree in co-relation 26117. Up to 2286 conditions per place. [2022-11-25 18:10:32,346 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 377 selfloop transitions, 122 changer transitions 7/506 dead transitions. [2022-11-25 18:10:32,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 506 transitions, 11386 flow [2022-11-25 18:10:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:10:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:10:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2429 transitions. [2022-11-25 18:10:32,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39793577981651373 [2022-11-25 18:10:32,350 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2429 transitions. [2022-11-25 18:10:32,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2429 transitions. [2022-11-25 18:10:32,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:32,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2429 transitions. [2022-11-25 18:10:32,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.5) internal successors, (2429), 14 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:32,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:32,358 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:32,359 INFO L175 Difference]: Start difference. First operand has 319 places, 466 transitions, 10212 flow. Second operand 14 states and 2429 transitions. [2022-11-25 18:10:32,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 506 transitions, 11386 flow [2022-11-25 18:10:32,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 506 transitions, 11261 flow, removed 25 selfloop flow, removed 5 redundant places. [2022-11-25 18:10:32,721 INFO L231 Difference]: Finished difference. Result has 327 places, 463 transitions, 10256 flow [2022-11-25 18:10:32,721 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=10058, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10256, PETRI_PLACES=327, PETRI_TRANSITIONS=463} [2022-11-25 18:10:32,721 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 301 predicate places. [2022-11-25 18:10:32,722 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 463 transitions, 10256 flow [2022-11-25 18:10:32,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:32,722 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:32,722 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:32,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:32,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-25 18:10:32,923 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash -129152336, now seen corresponding path program 14 times [2022-11-25 18:10:32,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:32,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382919666] [2022-11-25 18:10:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:32,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:33,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:33,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382919666] [2022-11-25 18:10:33,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382919666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:33,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:33,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:10:33,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949205182] [2022-11-25 18:10:33,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:33,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:10:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:10:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:10:34,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 436 [2022-11-25 18:10:34,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 463 transitions, 10256 flow. Second operand has 12 states, 12 states have (on average 168.75) internal successors, (2025), 12 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:34,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:34,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 436 [2022-11-25 18:10:34,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:35,900 INFO L130 PetriNetUnfolder]: 1799/3353 cut-off events. [2022-11-25 18:10:35,901 INFO L131 PetriNetUnfolder]: For 59895/59895 co-relation queries the response was YES. [2022-11-25 18:10:35,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26253 conditions, 3353 events. 1799/3353 cut-off events. For 59895/59895 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 21038 event pairs, 95 based on Foata normal form. 2/3355 useless extension candidates. Maximal degree in co-relation 26084. Up to 964 conditions per place. [2022-11-25 18:10:35,934 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 264 selfloop transitions, 257 changer transitions 6/527 dead transitions. [2022-11-25 18:10:35,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 527 transitions, 11756 flow [2022-11-25 18:10:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:10:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:10:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2799 transitions. [2022-11-25 18:10:35,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4012327981651376 [2022-11-25 18:10:35,938 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2799 transitions. [2022-11-25 18:10:35,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2799 transitions. [2022-11-25 18:10:35,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:35,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2799 transitions. [2022-11-25 18:10:35,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 174.9375) internal successors, (2799), 16 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:35,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 436.0) internal successors, (7412), 17 states have internal predecessors, (7412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:35,948 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 436.0) internal successors, (7412), 17 states have internal predecessors, (7412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:35,948 INFO L175 Difference]: Start difference. First operand has 327 places, 463 transitions, 10256 flow. Second operand 16 states and 2799 transitions. [2022-11-25 18:10:35,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 527 transitions, 11756 flow [2022-11-25 18:10:36,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 527 transitions, 11513 flow, removed 7 selfloop flow, removed 10 redundant places. [2022-11-25 18:10:36,454 INFO L231 Difference]: Finished difference. Result has 334 places, 464 transitions, 10614 flow [2022-11-25 18:10:36,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=10019, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10614, PETRI_PLACES=334, PETRI_TRANSITIONS=464} [2022-11-25 18:10:36,456 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 308 predicate places. [2022-11-25 18:10:36,456 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 464 transitions, 10614 flow [2022-11-25 18:10:36,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 168.75) internal successors, (2025), 12 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:36,456 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:36,457 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:36,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-25 18:10:36,457 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:36,458 INFO L85 PathProgramCache]: Analyzing trace with hash -498503578, now seen corresponding path program 15 times [2022-11-25 18:10:36,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:36,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527930220] [2022-11-25 18:10:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:36,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:37,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527930220] [2022-11-25 18:10:37,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527930220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:37,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:37,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:10:37,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241684186] [2022-11-25 18:10:37,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:37,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:10:37,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:37,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:10:37,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:10:37,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:10:37,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 464 transitions, 10614 flow. Second operand has 12 states, 12 states have (on average 169.66666666666666) internal successors, (2036), 12 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:37,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:37,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:10:37,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:39,431 INFO L130 PetriNetUnfolder]: 1644/3171 cut-off events. [2022-11-25 18:10:39,431 INFO L131 PetriNetUnfolder]: For 65831/65840 co-relation queries the response was YES. [2022-11-25 18:10:39,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26047 conditions, 3171 events. 1644/3171 cut-off events. For 65831/65840 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20485 event pairs, 179 based on Foata normal form. 4/3174 useless extension candidates. Maximal degree in co-relation 25875. Up to 1594 conditions per place. [2022-11-25 18:10:39,467 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 330 selfloop transitions, 175 changer transitions 6/526 dead transitions. [2022-11-25 18:10:39,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 526 transitions, 12177 flow [2022-11-25 18:10:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:10:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 18:10:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2635 transitions. [2022-11-25 18:10:39,471 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4029051987767584 [2022-11-25 18:10:39,471 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2635 transitions. [2022-11-25 18:10:39,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2635 transitions. [2022-11-25 18:10:39,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:39,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2635 transitions. [2022-11-25 18:10:39,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.66666666666666) internal successors, (2635), 15 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:39,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 436.0) internal successors, (6976), 16 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:39,477 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 436.0) internal successors, (6976), 16 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:39,478 INFO L175 Difference]: Start difference. First operand has 334 places, 464 transitions, 10614 flow. Second operand 15 states and 2635 transitions. [2022-11-25 18:10:39,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 526 transitions, 12177 flow [2022-11-25 18:10:39,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 526 transitions, 11839 flow, removed 11 selfloop flow, removed 9 redundant places. [2022-11-25 18:10:39,911 INFO L231 Difference]: Finished difference. Result has 341 places, 475 transitions, 10930 flow [2022-11-25 18:10:39,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=10297, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10930, PETRI_PLACES=341, PETRI_TRANSITIONS=475} [2022-11-25 18:10:39,912 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 315 predicate places. [2022-11-25 18:10:39,912 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 475 transitions, 10930 flow [2022-11-25 18:10:39,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.66666666666666) internal successors, (2036), 12 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:39,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:39,913 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:39,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-25 18:10:39,913 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:39,914 INFO L85 PathProgramCache]: Analyzing trace with hash 923132552, now seen corresponding path program 16 times [2022-11-25 18:10:39,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:39,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83932526] [2022-11-25 18:10:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:39,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:40,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:40,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83932526] [2022-11-25 18:10:40,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83932526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:40,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:40,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:10:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195846205] [2022-11-25 18:10:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:40,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:40,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:40,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:10:41,334 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 436 [2022-11-25 18:10:41,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 475 transitions, 10930 flow. Second operand has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:41,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:41,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 436 [2022-11-25 18:10:41,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:43,028 INFO L130 PetriNetUnfolder]: 1877/3478 cut-off events. [2022-11-25 18:10:43,028 INFO L131 PetriNetUnfolder]: For 71812/71812 co-relation queries the response was YES. [2022-11-25 18:10:43,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28361 conditions, 3478 events. 1877/3478 cut-off events. For 71812/71812 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 21858 event pairs, 692 based on Foata normal form. 3/3481 useless extension candidates. Maximal degree in co-relation 28188. Up to 2428 conditions per place. [2022-11-25 18:10:43,061 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 403 selfloop transitions, 115 changer transitions 7/525 dead transitions. [2022-11-25 18:10:43,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 525 transitions, 12342 flow [2022-11-25 18:10:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:10:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:10:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2431 transitions. [2022-11-25 18:10:43,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3982634338138925 [2022-11-25 18:10:43,064 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2431 transitions. [2022-11-25 18:10:43,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2431 transitions. [2022-11-25 18:10:43,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:43,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2431 transitions. [2022-11-25 18:10:43,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.64285714285714) internal successors, (2431), 14 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:43,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:43,070 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:43,070 INFO L175 Difference]: Start difference. First operand has 341 places, 475 transitions, 10930 flow. Second operand 14 states and 2431 transitions. [2022-11-25 18:10:43,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 525 transitions, 12342 flow [2022-11-25 18:10:43,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 525 transitions, 11862 flow, removed 48 selfloop flow, removed 8 redundant places. [2022-11-25 18:10:43,408 INFO L231 Difference]: Finished difference. Result has 348 places, 479 transitions, 10809 flow [2022-11-25 18:10:43,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=10451, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10809, PETRI_PLACES=348, PETRI_TRANSITIONS=479} [2022-11-25 18:10:43,408 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 322 predicate places. [2022-11-25 18:10:43,409 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 479 transitions, 10809 flow [2022-11-25 18:10:43,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:43,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:43,409 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:43,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-25 18:10:43,409 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:43,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:43,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1808930832, now seen corresponding path program 17 times [2022-11-25 18:10:43,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:43,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176117444] [2022-11-25 18:10:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:43,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:44,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:44,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176117444] [2022-11-25 18:10:44,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176117444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:44,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:44,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:10:44,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485608502] [2022-11-25 18:10:44,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:44,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:44,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:44,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:44,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:10:44,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 436 [2022-11-25 18:10:44,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 479 transitions, 10809 flow. Second operand has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:44,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:44,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 436 [2022-11-25 18:10:44,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:46,709 INFO L130 PetriNetUnfolder]: 1883/3504 cut-off events. [2022-11-25 18:10:46,709 INFO L131 PetriNetUnfolder]: For 67883/67883 co-relation queries the response was YES. [2022-11-25 18:10:46,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27897 conditions, 3504 events. 1883/3504 cut-off events. For 67883/67883 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 22173 event pairs, 156 based on Foata normal form. 1/3505 useless extension candidates. Maximal degree in co-relation 27721. Up to 1275 conditions per place. [2022-11-25 18:10:46,748 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 359 selfloop transitions, 218 changer transitions 5/582 dead transitions. [2022-11-25 18:10:46,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 582 transitions, 12774 flow [2022-11-25 18:10:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 18:10:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 18:10:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3998 transitions. [2022-11-25 18:10:46,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3986836856800957 [2022-11-25 18:10:46,752 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3998 transitions. [2022-11-25 18:10:46,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3998 transitions. [2022-11-25 18:10:46,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:46,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3998 transitions. [2022-11-25 18:10:46,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 173.82608695652175) internal successors, (3998), 23 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:46,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 436.0) internal successors, (10464), 24 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:46,767 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 436.0) internal successors, (10464), 24 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:46,767 INFO L175 Difference]: Start difference. First operand has 348 places, 479 transitions, 10809 flow. Second operand 23 states and 3998 transitions. [2022-11-25 18:10:46,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 582 transitions, 12774 flow [2022-11-25 18:10:47,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 582 transitions, 12545 flow, removed 32 selfloop flow, removed 12 redundant places. [2022-11-25 18:10:47,231 INFO L231 Difference]: Finished difference. Result has 363 places, 492 transitions, 11332 flow [2022-11-25 18:10:47,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=10592, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11332, PETRI_PLACES=363, PETRI_TRANSITIONS=492} [2022-11-25 18:10:47,232 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 337 predicate places. [2022-11-25 18:10:47,232 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 492 transitions, 11332 flow [2022-11-25 18:10:47,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:47,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:47,233 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:47,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-25 18:10:47,234 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1974644362, now seen corresponding path program 18 times [2022-11-25 18:10:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:47,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942888935] [2022-11-25 18:10:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:47,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:10:48,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:48,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942888935] [2022-11-25 18:10:48,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942888935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:48,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324408447] [2022-11-25 18:10:48,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:10:48,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:48,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:48,264 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:48,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 18:10:48,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 18:10:48,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:10:48,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 18:10:48,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:48,815 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:10:48,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2022-11-25 18:10:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:48,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:10:48,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324408447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:48,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:10:48,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 24 [2022-11-25 18:10:48,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264516244] [2022-11-25 18:10:48,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:48,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:48,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:48,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:10:49,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 436 [2022-11-25 18:10:49,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 492 transitions, 11332 flow. Second operand has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:49,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:49,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 436 [2022-11-25 18:10:49,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:51,363 INFO L130 PetriNetUnfolder]: 1882/3505 cut-off events. [2022-11-25 18:10:51,363 INFO L131 PetriNetUnfolder]: For 72972/72972 co-relation queries the response was YES. [2022-11-25 18:10:51,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28644 conditions, 3505 events. 1882/3505 cut-off events. For 72972/72972 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 22109 event pairs, 444 based on Foata normal form. 3/3508 useless extension candidates. Maximal degree in co-relation 28467. Up to 1834 conditions per place. [2022-11-25 18:10:51,394 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 408 selfloop transitions, 109 changer transitions 12/529 dead transitions. [2022-11-25 18:10:51,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 529 transitions, 12661 flow [2022-11-25 18:10:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:10:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:10:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1910 transitions. [2022-11-25 18:10:51,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39824854045037533 [2022-11-25 18:10:51,396 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1910 transitions. [2022-11-25 18:10:51,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1910 transitions. [2022-11-25 18:10:51,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:51,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1910 transitions. [2022-11-25 18:10:51,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 173.63636363636363) internal successors, (1910), 11 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:51,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 436.0) internal successors, (5232), 12 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:51,400 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 436.0) internal successors, (5232), 12 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:51,400 INFO L175 Difference]: Start difference. First operand has 363 places, 492 transitions, 11332 flow. Second operand 11 states and 1910 transitions. [2022-11-25 18:10:51,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 529 transitions, 12661 flow [2022-11-25 18:10:51,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 529 transitions, 12106 flow, removed 66 selfloop flow, removed 12 redundant places. [2022-11-25 18:10:51,746 INFO L231 Difference]: Finished difference. Result has 363 places, 489 transitions, 10930 flow [2022-11-25 18:10:51,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=10787, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10930, PETRI_PLACES=363, PETRI_TRANSITIONS=489} [2022-11-25 18:10:51,746 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 337 predicate places. [2022-11-25 18:10:51,747 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 489 transitions, 10930 flow [2022-11-25 18:10:51,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:51,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:51,747 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:51,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:51,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-25 18:10:51,953 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash 589883112, now seen corresponding path program 19 times [2022-11-25 18:10:51,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:51,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940243863] [2022-11-25 18:10:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:51,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:52,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:52,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940243863] [2022-11-25 18:10:52,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940243863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:52,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:52,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:10:52,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926122429] [2022-11-25 18:10:52,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:52,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:52,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:52,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:52,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:10:53,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 436 [2022-11-25 18:10:53,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 489 transitions, 10930 flow. Second operand has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:53,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:53,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 436 [2022-11-25 18:10:53,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:55,480 INFO L130 PetriNetUnfolder]: 2007/3731 cut-off events. [2022-11-25 18:10:55,481 INFO L131 PetriNetUnfolder]: For 73097/73097 co-relation queries the response was YES. [2022-11-25 18:10:55,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29658 conditions, 3731 events. 2007/3731 cut-off events. For 73097/73097 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 23924 event pairs, 186 based on Foata normal form. 6/3737 useless extension candidates. Maximal degree in co-relation 29480. Up to 1275 conditions per place. [2022-11-25 18:10:55,520 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 380 selfloop transitions, 221 changer transitions 7/608 dead transitions. [2022-11-25 18:10:55,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 608 transitions, 13186 flow [2022-11-25 18:10:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:10:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 18:10:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3819 transitions. [2022-11-25 18:10:55,524 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3981442869057548 [2022-11-25 18:10:55,524 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3819 transitions. [2022-11-25 18:10:55,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3819 transitions. [2022-11-25 18:10:55,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:55,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3819 transitions. [2022-11-25 18:10:55,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 173.5909090909091) internal successors, (3819), 22 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:55,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 436.0) internal successors, (10028), 23 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:55,532 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 436.0) internal successors, (10028), 23 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:55,532 INFO L175 Difference]: Start difference. First operand has 363 places, 489 transitions, 10930 flow. Second operand 22 states and 3819 transitions. [2022-11-25 18:10:55,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 608 transitions, 13186 flow [2022-11-25 18:10:56,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 608 transitions, 12937 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-11-25 18:10:56,051 INFO L231 Difference]: Finished difference. Result has 373 places, 500 transitions, 11582 flow [2022-11-25 18:10:56,052 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=10693, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11582, PETRI_PLACES=373, PETRI_TRANSITIONS=500} [2022-11-25 18:10:56,052 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 347 predicate places. [2022-11-25 18:10:56,052 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 500 transitions, 11582 flow [2022-11-25 18:10:56,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 167.6153846153846) internal successors, (2179), 13 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:56,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:56,053 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:56,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-11-25 18:10:56,053 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:10:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:56,054 INFO L85 PathProgramCache]: Analyzing trace with hash 756645944, now seen corresponding path program 20 times [2022-11-25 18:10:56,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:56,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117235311] [2022-11-25 18:10:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:56,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:10:56,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:56,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117235311] [2022-11-25 18:10:56,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117235311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:56,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:56,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:10:56,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732316073] [2022-11-25 18:10:56,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:56,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:56,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:10:57,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 436 [2022-11-25 18:10:57,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 500 transitions, 11582 flow. Second operand has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:57,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:57,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 436 [2022-11-25 18:10:57,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:59,683 INFO L130 PetriNetUnfolder]: 2041/3829 cut-off events. [2022-11-25 18:10:59,683 INFO L131 PetriNetUnfolder]: For 79681/79681 co-relation queries the response was YES. [2022-11-25 18:10:59,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31528 conditions, 3829 events. 2041/3829 cut-off events. For 79681/79681 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 24978 event pairs, 63 based on Foata normal form. 3/3832 useless extension candidates. Maximal degree in co-relation 31350. Up to 2016 conditions per place. [2022-11-25 18:10:59,725 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 320 selfloop transitions, 289 changer transitions 5/614 dead transitions. [2022-11-25 18:10:59,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 614 transitions, 13974 flow [2022-11-25 18:10:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 18:10:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 18:10:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4176 transitions. [2022-11-25 18:10:59,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39908256880733944 [2022-11-25 18:10:59,729 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4176 transitions. [2022-11-25 18:10:59,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4176 transitions. [2022-11-25 18:10:59,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:59,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4176 transitions. [2022-11-25 18:10:59,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:59,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 436.0) internal successors, (10900), 25 states have internal predecessors, (10900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:59,737 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 436.0) internal successors, (10900), 25 states have internal predecessors, (10900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:59,738 INFO L175 Difference]: Start difference. First operand has 373 places, 500 transitions, 11582 flow. Second operand 24 states and 4176 transitions. [2022-11-25 18:10:59,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 614 transitions, 13974 flow [2022-11-25 18:11:00,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 614 transitions, 13679 flow, removed 53 selfloop flow, removed 13 redundant places. [2022-11-25 18:11:00,173 INFO L231 Difference]: Finished difference. Result has 388 places, 532 transitions, 12634 flow [2022-11-25 18:11:00,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=11346, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12634, PETRI_PLACES=388, PETRI_TRANSITIONS=532} [2022-11-25 18:11:00,175 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 362 predicate places. [2022-11-25 18:11:00,175 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 532 transitions, 12634 flow [2022-11-25 18:11:00,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:00,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:00,176 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:00,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-11-25 18:11:00,176 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:11:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash 942325904, now seen corresponding path program 21 times [2022-11-25 18:11:00,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:00,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871922674] [2022-11-25 18:11:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:00,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:11:00,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:00,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871922674] [2022-11-25 18:11:00,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871922674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:00,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:00,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:11:00,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629368855] [2022-11-25 18:11:00,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:00,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:11:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:00,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:11:00,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:11:01,341 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:11:01,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 532 transitions, 12634 flow. Second operand has 13 states, 13 states have (on average 169.6153846153846) internal successors, (2205), 13 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:01,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:01,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:11:01,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:03,305 INFO L130 PetriNetUnfolder]: 2041/3833 cut-off events. [2022-11-25 18:11:03,305 INFO L131 PetriNetUnfolder]: For 85761/85761 co-relation queries the response was YES. [2022-11-25 18:11:03,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32072 conditions, 3833 events. 2041/3833 cut-off events. For 85761/85761 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 25024 event pairs, 140 based on Foata normal form. 3/3836 useless extension candidates. Maximal degree in co-relation 31887. Up to 1602 conditions per place. [2022-11-25 18:11:03,341 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 352 selfloop transitions, 230 changer transitions 9/591 dead transitions. [2022-11-25 18:11:03,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 591 transitions, 14216 flow [2022-11-25 18:11:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 18:11:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 18:11:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3649 transitions. [2022-11-25 18:11:03,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3985364788117082 [2022-11-25 18:11:03,344 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3649 transitions. [2022-11-25 18:11:03,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3649 transitions. [2022-11-25 18:11:03,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:03,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3649 transitions. [2022-11-25 18:11:03,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 173.76190476190476) internal successors, (3649), 21 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:03,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:03,352 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:03,352 INFO L175 Difference]: Start difference. First operand has 388 places, 532 transitions, 12634 flow. Second operand 21 states and 3649 transitions. [2022-11-25 18:11:03,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 591 transitions, 14216 flow [2022-11-25 18:11:03,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 591 transitions, 13450 flow, removed 52 selfloop flow, removed 14 redundant places. [2022-11-25 18:11:03,775 INFO L231 Difference]: Finished difference. Result has 394 places, 531 transitions, 12306 flow [2022-11-25 18:11:03,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=11873, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12306, PETRI_PLACES=394, PETRI_TRANSITIONS=531} [2022-11-25 18:11:03,776 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 368 predicate places. [2022-11-25 18:11:03,776 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 531 transitions, 12306 flow [2022-11-25 18:11:03,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.6153846153846) internal successors, (2205), 13 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:03,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:03,777 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:03,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-11-25 18:11:03,778 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:11:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash 838045000, now seen corresponding path program 22 times [2022-11-25 18:11:03,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:03,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361106198] [2022-11-25 18:11:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:03,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:11:04,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:04,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361106198] [2022-11-25 18:11:04,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361106198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:04,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:04,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:11:04,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105140561] [2022-11-25 18:11:04,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:04,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:11:04,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:04,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:11:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:11:05,129 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 436 [2022-11-25 18:11:05,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 531 transitions, 12306 flow. Second operand has 12 states, 12 states have (on average 167.75) internal successors, (2013), 12 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:05,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:05,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 436 [2022-11-25 18:11:05,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:07,167 INFO L130 PetriNetUnfolder]: 2038/3820 cut-off events. [2022-11-25 18:11:07,167 INFO L131 PetriNetUnfolder]: For 77533/77533 co-relation queries the response was YES. [2022-11-25 18:11:07,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31327 conditions, 3820 events. 2038/3820 cut-off events. For 77533/77533 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 24826 event pairs, 174 based on Foata normal form. 1/3821 useless extension candidates. Maximal degree in co-relation 31146. Up to 1007 conditions per place. [2022-11-25 18:11:07,206 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 293 selfloop transitions, 292 changer transitions 5/590 dead transitions. [2022-11-25 18:11:07,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 590 transitions, 13902 flow [2022-11-25 18:11:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:11:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:11:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2429 transitions. [2022-11-25 18:11:07,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39793577981651373 [2022-11-25 18:11:07,209 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2429 transitions. [2022-11-25 18:11:07,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2429 transitions. [2022-11-25 18:11:07,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:07,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2429 transitions. [2022-11-25 18:11:07,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.5) internal successors, (2429), 14 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:07,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:07,214 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 436.0) internal successors, (6540), 15 states have internal predecessors, (6540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:07,214 INFO L175 Difference]: Start difference. First operand has 394 places, 531 transitions, 12306 flow. Second operand 14 states and 2429 transitions. [2022-11-25 18:11:07,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 590 transitions, 13902 flow [2022-11-25 18:11:07,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 590 transitions, 13417 flow, removed 8 selfloop flow, removed 19 redundant places. [2022-11-25 18:11:07,594 INFO L231 Difference]: Finished difference. Result has 387 places, 534 transitions, 12467 flow [2022-11-25 18:11:07,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=11831, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12467, PETRI_PLACES=387, PETRI_TRANSITIONS=534} [2022-11-25 18:11:07,595 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 361 predicate places. [2022-11-25 18:11:07,595 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 534 transitions, 12467 flow [2022-11-25 18:11:07,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.75) internal successors, (2013), 12 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:07,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:07,595 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:07,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-11-25 18:11:07,596 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:11:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash 799354038, now seen corresponding path program 23 times [2022-11-25 18:11:07,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:07,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548007011] [2022-11-25 18:11:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:07,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:11:08,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:08,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548007011] [2022-11-25 18:11:08,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548007011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:08,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:08,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:11:08,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88462221] [2022-11-25 18:11:08,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:08,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:11:08,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:08,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:11:08,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:11:09,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 436 [2022-11-25 18:11:09,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 534 transitions, 12467 flow. Second operand has 13 states, 13 states have (on average 166.53846153846155) internal successors, (2165), 13 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:09,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:09,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 436 [2022-11-25 18:11:09,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:11,396 INFO L130 PetriNetUnfolder]: 1988/3817 cut-off events. [2022-11-25 18:11:11,396 INFO L131 PetriNetUnfolder]: For 82300/82309 co-relation queries the response was YES. [2022-11-25 18:11:11,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31990 conditions, 3817 events. 1988/3817 cut-off events. For 82300/82309 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 25704 event pairs, 97 based on Foata normal form. 8/3824 useless extension candidates. Maximal degree in co-relation 31807. Up to 1902 conditions per place. [2022-11-25 18:11:11,441 INFO L137 encePairwiseOnDemand]: 422/436 looper letters, 395 selfloop transitions, 229 changer transitions 6/650 dead transitions. [2022-11-25 18:11:11,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 650 transitions, 15290 flow [2022-11-25 18:11:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:11:11,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:11:11,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2768 transitions. [2022-11-25 18:11:11,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3967889908256881 [2022-11-25 18:11:11,443 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2768 transitions. [2022-11-25 18:11:11,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2768 transitions. [2022-11-25 18:11:11,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:11,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2768 transitions. [2022-11-25 18:11:11,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 173.0) internal successors, (2768), 16 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:11,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 436.0) internal successors, (7412), 17 states have internal predecessors, (7412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:11,449 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 436.0) internal successors, (7412), 17 states have internal predecessors, (7412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:11,449 INFO L175 Difference]: Start difference. First operand has 387 places, 534 transitions, 12467 flow. Second operand 16 states and 2768 transitions. [2022-11-25 18:11:11,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 650 transitions, 15290 flow [2022-11-25 18:11:11,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 650 transitions, 14845 flow, removed 9 selfloop flow, removed 11 redundant places. [2022-11-25 18:11:11,881 INFO L231 Difference]: Finished difference. Result has 397 places, 566 transitions, 13473 flow [2022-11-25 18:11:11,881 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=12079, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13473, PETRI_PLACES=397, PETRI_TRANSITIONS=566} [2022-11-25 18:11:11,882 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 371 predicate places. [2022-11-25 18:11:11,882 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 566 transitions, 13473 flow [2022-11-25 18:11:11,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 166.53846153846155) internal successors, (2165), 13 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:11,882 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:11,883 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:11,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-11-25 18:11:11,883 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:11:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1247532238, now seen corresponding path program 24 times [2022-11-25 18:11:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:11,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168185412] [2022-11-25 18:11:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:11,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:11:13,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:13,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168185412] [2022-11-25 18:11:13,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168185412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:13,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:13,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 18:11:13,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408017597] [2022-11-25 18:11:13,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:13,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:11:13,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:11:13,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:11:14,317 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 436 [2022-11-25 18:11:14,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 566 transitions, 13473 flow. Second operand has 15 states, 15 states have (on average 163.4) internal successors, (2451), 15 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:14,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:14,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 436 [2022-11-25 18:11:14,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:17,758 INFO L130 PetriNetUnfolder]: 2783/5046 cut-off events. [2022-11-25 18:11:17,758 INFO L131 PetriNetUnfolder]: For 106074/106074 co-relation queries the response was YES. [2022-11-25 18:11:17,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42557 conditions, 5046 events. 2783/5046 cut-off events. For 106074/106074 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 33499 event pairs, 54 based on Foata normal form. 7/5053 useless extension candidates. Maximal degree in co-relation 42368. Up to 1064 conditions per place. [2022-11-25 18:11:17,812 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 311 selfloop transitions, 433 changer transitions 7/751 dead transitions. [2022-11-25 18:11:17,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 751 transitions, 17496 flow [2022-11-25 18:11:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 18:11:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 18:11:17,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3905 transitions. [2022-11-25 18:11:17,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3894096529716793 [2022-11-25 18:11:17,815 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3905 transitions. [2022-11-25 18:11:17,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3905 transitions. [2022-11-25 18:11:17,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:17,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3905 transitions. [2022-11-25 18:11:17,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 169.7826086956522) internal successors, (3905), 23 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:17,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 436.0) internal successors, (10464), 24 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:17,824 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 436.0) internal successors, (10464), 24 states have internal predecessors, (10464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:17,824 INFO L175 Difference]: Start difference. First operand has 397 places, 566 transitions, 13473 flow. Second operand 23 states and 3905 transitions. [2022-11-25 18:11:17,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 751 transitions, 17496 flow [2022-11-25 18:11:18,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 751 transitions, 17144 flow, removed 24 selfloop flow, removed 5 redundant places. [2022-11-25 18:11:18,380 INFO L231 Difference]: Finished difference. Result has 420 places, 633 transitions, 15915 flow [2022-11-25 18:11:18,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=13187, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15915, PETRI_PLACES=420, PETRI_TRANSITIONS=633} [2022-11-25 18:11:18,381 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 394 predicate places. [2022-11-25 18:11:18,381 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 633 transitions, 15915 flow [2022-11-25 18:11:18,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 163.4) internal successors, (2451), 15 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:18,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:18,382 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:18,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-11-25 18:11:18,382 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:11:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1304739238, now seen corresponding path program 25 times [2022-11-25 18:11:18,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:18,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547659083] [2022-11-25 18:11:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:11:19,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:19,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547659083] [2022-11-25 18:11:19,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547659083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:19,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:19,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 18:11:19,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812868301] [2022-11-25 18:11:19,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:19,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:11:19,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:19,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:11:19,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:11:20,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 436 [2022-11-25 18:11:20,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 633 transitions, 15915 flow. Second operand has 14 states, 14 states have (on average 165.5) internal successors, (2317), 14 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:20,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:20,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 436 [2022-11-25 18:11:20,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:23,916 INFO L130 PetriNetUnfolder]: 3011/5444 cut-off events. [2022-11-25 18:11:23,916 INFO L131 PetriNetUnfolder]: For 129944/129944 co-relation queries the response was YES. [2022-11-25 18:11:23,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48202 conditions, 5444 events. 3011/5444 cut-off events. For 129944/129944 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 36692 event pairs, 258 based on Foata normal form. 1/5445 useless extension candidates. Maximal degree in co-relation 48008. Up to 1703 conditions per place. [2022-11-25 18:11:23,988 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 308 selfloop transitions, 456 changer transitions 6/770 dead transitions. [2022-11-25 18:11:23,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 770 transitions, 19140 flow [2022-11-25 18:11:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 18:11:23,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 18:11:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4105 transitions. [2022-11-25 18:11:23,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3922974006116208 [2022-11-25 18:11:23,992 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4105 transitions. [2022-11-25 18:11:23,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4105 transitions. [2022-11-25 18:11:23,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:23,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4105 transitions. [2022-11-25 18:11:23,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 171.04166666666666) internal successors, (4105), 24 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:24,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 436.0) internal successors, (10900), 25 states have internal predecessors, (10900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:24,001 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 436.0) internal successors, (10900), 25 states have internal predecessors, (10900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:24,001 INFO L175 Difference]: Start difference. First operand has 420 places, 633 transitions, 15915 flow. Second operand 24 states and 4105 transitions. [2022-11-25 18:11:24,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 770 transitions, 19140 flow [2022-11-25 18:11:24,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 770 transitions, 18390 flow, removed 112 selfloop flow, removed 9 redundant places. [2022-11-25 18:11:24,849 INFO L231 Difference]: Finished difference. Result has 439 places, 673 transitions, 17340 flow [2022-11-25 18:11:24,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=15222, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=17340, PETRI_PLACES=439, PETRI_TRANSITIONS=673} [2022-11-25 18:11:24,849 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 413 predicate places. [2022-11-25 18:11:24,850 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 673 transitions, 17340 flow [2022-11-25 18:11:24,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 165.5) internal successors, (2317), 14 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:24,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:24,850 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:24,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-11-25 18:11:24,851 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:11:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash 66849036, now seen corresponding path program 26 times [2022-11-25 18:11:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:24,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489421650] [2022-11-25 18:11:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:11:25,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:25,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489421650] [2022-11-25 18:11:25,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489421650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:25,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173628342] [2022-11-25 18:11:25,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:11:25,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:25,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:25,929 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:11:25,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 18:11:26,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:11:26,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:11:26,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 18:11:26,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:26,479 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:11:26,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2022-11-25 18:11:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:11:26,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:11:26,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173628342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:26,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:11:26,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 24 [2022-11-25 18:11:26,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980133574] [2022-11-25 18:11:26,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:26,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:11:26,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:11:26,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:11:27,167 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 436 [2022-11-25 18:11:27,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 673 transitions, 17340 flow. Second operand has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:27,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:27,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 436 [2022-11-25 18:11:27,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:29,711 INFO L130 PetriNetUnfolder]: 3006/5433 cut-off events. [2022-11-25 18:11:29,712 INFO L131 PetriNetUnfolder]: For 139629/139629 co-relation queries the response was YES. [2022-11-25 18:11:29,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48702 conditions, 5433 events. 3006/5433 cut-off events. For 139629/139629 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 36435 event pairs, 657 based on Foata normal form. 3/5436 useless extension candidates. Maximal degree in co-relation 48505. Up to 2911 conditions per place. [2022-11-25 18:11:29,775 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 554 selfloop transitions, 136 changer transitions 11/701 dead transitions. [2022-11-25 18:11:29,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 701 transitions, 18895 flow [2022-11-25 18:11:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:11:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:11:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2245 transitions. [2022-11-25 18:11:29,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3960832745236415 [2022-11-25 18:11:29,777 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2245 transitions. [2022-11-25 18:11:29,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2245 transitions. [2022-11-25 18:11:29,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:29,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2245 transitions. [2022-11-25 18:11:29,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.69230769230768) internal successors, (2245), 13 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:29,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 436.0) internal successors, (6104), 14 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:29,782 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 436.0) internal successors, (6104), 14 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:29,783 INFO L175 Difference]: Start difference. First operand has 439 places, 673 transitions, 17340 flow. Second operand 13 states and 2245 transitions. [2022-11-25 18:11:29,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 701 transitions, 18895 flow [2022-11-25 18:11:30,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 701 transitions, 18342 flow, removed 49 selfloop flow, removed 13 redundant places. [2022-11-25 18:11:30,541 INFO L231 Difference]: Finished difference. Result has 439 places, 669 transitions, 16947 flow [2022-11-25 18:11:30,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=16749, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16947, PETRI_PLACES=439, PETRI_TRANSITIONS=669} [2022-11-25 18:11:30,542 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 413 predicate places. [2022-11-25 18:11:30,542 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 669 transitions, 16947 flow [2022-11-25 18:11:30,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.6153846153846) internal successors, (2192), 13 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:30,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:30,542 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:30,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-25 18:11:30,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:30,743 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:11:30,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:30,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1650672998, now seen corresponding path program 27 times [2022-11-25 18:11:30,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:30,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677928784] [2022-11-25 18:11:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:30,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:11:31,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:31,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677928784] [2022-11-25 18:11:31,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677928784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:31,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:31,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 18:11:31,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356099925] [2022-11-25 18:11:31,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:31,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:11:31,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:31,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:11:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:11:32,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 436 [2022-11-25 18:11:32,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 669 transitions, 16947 flow. Second operand has 14 states, 14 states have (on average 165.5) internal successors, (2317), 14 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:32,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:32,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 436 [2022-11-25 18:11:32,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:36,399 INFO L130 PetriNetUnfolder]: 3135/5688 cut-off events. [2022-11-25 18:11:36,400 INFO L131 PetriNetUnfolder]: For 151614/151614 co-relation queries the response was YES. [2022-11-25 18:11:36,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51081 conditions, 5688 events. 3135/5688 cut-off events. For 151614/151614 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 38843 event pairs, 406 based on Foata normal form. 1/5689 useless extension candidates. Maximal degree in co-relation 50883. Up to 2488 conditions per place. [2022-11-25 18:11:36,462 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 410 selfloop transitions, 380 changer transitions 5/795 dead transitions. [2022-11-25 18:11:36,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 795 transitions, 20077 flow [2022-11-25 18:11:36,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 18:11:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 18:11:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4605 transitions. [2022-11-25 18:11:36,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39118246687054026 [2022-11-25 18:11:36,467 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4605 transitions. [2022-11-25 18:11:36,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4605 transitions. [2022-11-25 18:11:36,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:36,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4605 transitions. [2022-11-25 18:11:36,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 170.55555555555554) internal successors, (4605), 27 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:36,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 436.0) internal successors, (12208), 28 states have internal predecessors, (12208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:36,476 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 436.0) internal successors, (12208), 28 states have internal predecessors, (12208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:36,476 INFO L175 Difference]: Start difference. First operand has 439 places, 669 transitions, 16947 flow. Second operand 27 states and 4605 transitions. [2022-11-25 18:11:36,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 795 transitions, 20077 flow [2022-11-25 18:11:37,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 795 transitions, 19763 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-25 18:11:37,257 INFO L231 Difference]: Finished difference. Result has 459 places, 710 transitions, 18761 flow [2022-11-25 18:11:37,258 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=16663, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=18761, PETRI_PLACES=459, PETRI_TRANSITIONS=710} [2022-11-25 18:11:37,258 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 433 predicate places. [2022-11-25 18:11:37,258 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 710 transitions, 18761 flow [2022-11-25 18:11:37,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 165.5) internal successors, (2317), 14 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:37,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:37,259 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:37,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-11-25 18:11:37,259 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:11:37,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash 63237430, now seen corresponding path program 28 times [2022-11-25 18:11:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:37,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56846380] [2022-11-25 18:11:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:37,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:11:38,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:38,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56846380] [2022-11-25 18:11:38,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56846380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:38,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:38,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 18:11:38,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892719666] [2022-11-25 18:11:38,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:11:38,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:38,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:11:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:11:38,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 436 [2022-11-25 18:11:38,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 710 transitions, 18761 flow. Second operand has 14 states, 14 states have (on average 164.5) internal successors, (2303), 14 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:38,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:38,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 436 [2022-11-25 18:11:38,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:43,023 INFO L130 PetriNetUnfolder]: 3441/6350 cut-off events. [2022-11-25 18:11:43,023 INFO L131 PetriNetUnfolder]: For 175354/175354 co-relation queries the response was YES. [2022-11-25 18:11:43,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57043 conditions, 6350 events. 3441/6350 cut-off events. For 175354/175354 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 45565 event pairs, 345 based on Foata normal form. 4/6354 useless extension candidates. Maximal degree in co-relation 56837. Up to 1894 conditions per place. [2022-11-25 18:11:43,145 INFO L137 encePairwiseOnDemand]: 421/436 looper letters, 437 selfloop transitions, 501 changer transitions 11/949 dead transitions. [2022-11-25 18:11:43,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 949 transitions, 23887 flow [2022-11-25 18:11:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 18:11:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-25 18:11:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4967 transitions. [2022-11-25 18:11:43,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39283454602973744 [2022-11-25 18:11:43,371 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4967 transitions. [2022-11-25 18:11:43,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4967 transitions. [2022-11-25 18:11:43,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:43,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4967 transitions. [2022-11-25 18:11:43,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 171.27586206896552) internal successors, (4967), 29 states have internal predecessors, (4967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:43,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 436.0) internal successors, (13080), 30 states have internal predecessors, (13080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:43,388 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 436.0) internal successors, (13080), 30 states have internal predecessors, (13080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:43,388 INFO L175 Difference]: Start difference. First operand has 459 places, 710 transitions, 18761 flow. Second operand 29 states and 4967 transitions. [2022-11-25 18:11:43,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 949 transitions, 23887 flow [2022-11-25 18:11:44,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 949 transitions, 23614 flow, removed 80 selfloop flow, removed 8 redundant places. [2022-11-25 18:11:44,645 INFO L231 Difference]: Finished difference. Result has 494 places, 786 transitions, 22118 flow [2022-11-25 18:11:44,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=18556, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=22118, PETRI_PLACES=494, PETRI_TRANSITIONS=786} [2022-11-25 18:11:44,646 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 468 predicate places. [2022-11-25 18:11:44,647 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 786 transitions, 22118 flow [2022-11-25 18:11:44,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 164.5) internal successors, (2303), 14 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:44,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:44,647 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:44,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-11-25 18:11:44,647 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:11:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:44,648 INFO L85 PathProgramCache]: Analyzing trace with hash 471723026, now seen corresponding path program 29 times [2022-11-25 18:11:44,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:44,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542012965] [2022-11-25 18:11:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:44,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:11:46,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:46,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542012965] [2022-11-25 18:11:46,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542012965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:46,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670634707] [2022-11-25 18:11:46,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:11:46,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:46,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:46,206 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:11:46,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 18:11:46,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 18:11:46,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:11:46,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 18:11:46,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:11:47,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:11:47,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670634707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:47,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:11:47,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [17] total 26 [2022-11-25 18:11:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74619741] [2022-11-25 18:11:47,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:47,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:11:47,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:11:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-11-25 18:11:47,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:11:47,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 786 transitions, 22118 flow. Second operand has 11 states, 11 states have (on average 169.9090909090909) internal successors, (1869), 11 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:47,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:47,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:11:47,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:51,012 INFO L130 PetriNetUnfolder]: 3532/6499 cut-off events. [2022-11-25 18:11:51,013 INFO L131 PetriNetUnfolder]: For 201004/201004 co-relation queries the response was YES. [2022-11-25 18:11:51,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61354 conditions, 6499 events. 3532/6499 cut-off events. For 201004/201004 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 46751 event pairs, 312 based on Foata normal form. 13/6512 useless extension candidates. Maximal degree in co-relation 61133. Up to 3498 conditions per place. [2022-11-25 18:11:51,092 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 544 selfloop transitions, 299 changer transitions 11/854 dead transitions. [2022-11-25 18:11:51,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 854 transitions, 24440 flow [2022-11-25 18:11:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:11:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:11:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2302 transitions. [2022-11-25 18:11:51,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4061397318278052 [2022-11-25 18:11:51,094 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2302 transitions. [2022-11-25 18:11:51,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2302 transitions. [2022-11-25 18:11:51,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:51,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2302 transitions. [2022-11-25 18:11:51,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 177.07692307692307) internal successors, (2302), 13 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:51,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 436.0) internal successors, (6104), 14 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:51,099 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 436.0) internal successors, (6104), 14 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:51,099 INFO L175 Difference]: Start difference. First operand has 494 places, 786 transitions, 22118 flow. Second operand 13 states and 2302 transitions. [2022-11-25 18:11:51,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 854 transitions, 24440 flow [2022-11-25 18:11:52,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 854 transitions, 24001 flow, removed 31 selfloop flow, removed 11 redundant places. [2022-11-25 18:11:52,552 INFO L231 Difference]: Finished difference. Result has 501 places, 796 transitions, 22711 flow [2022-11-25 18:11:52,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=21615, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=22711, PETRI_PLACES=501, PETRI_TRANSITIONS=796} [2022-11-25 18:11:52,553 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 475 predicate places. [2022-11-25 18:11:52,553 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 796 transitions, 22711 flow [2022-11-25 18:11:52,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.9090909090909) internal successors, (1869), 11 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:52,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:52,554 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:52,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 18:11:52,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-11-25 18:11:52,755 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:11:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1486409098, now seen corresponding path program 30 times [2022-11-25 18:11:52,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226262171] [2022-11-25 18:11:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:52,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:11:53,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:53,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226262171] [2022-11-25 18:11:53,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226262171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:53,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:53,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:11:53,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754155799] [2022-11-25 18:11:53,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:53,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:11:53,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:53,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:11:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:11:54,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 436 [2022-11-25 18:11:54,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 796 transitions, 22711 flow. Second operand has 13 states, 13 states have (on average 163.6153846153846) internal successors, (2127), 13 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:54,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:54,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 436 [2022-11-25 18:11:54,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:58,884 INFO L130 PetriNetUnfolder]: 3563/6571 cut-off events. [2022-11-25 18:11:58,885 INFO L131 PetriNetUnfolder]: For 221808/221808 co-relation queries the response was YES. [2022-11-25 18:11:58,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62280 conditions, 6571 events. 3563/6571 cut-off events. For 221808/221808 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 47484 event pairs, 178 based on Foata normal form. 62/6633 useless extension candidates. Maximal degree in co-relation 62055. Up to 3372 conditions per place. [2022-11-25 18:11:58,982 INFO L137 encePairwiseOnDemand]: 421/436 looper letters, 497 selfloop transitions, 390 changer transitions 6/893 dead transitions. [2022-11-25 18:11:58,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 893 transitions, 25307 flow [2022-11-25 18:11:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 18:11:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 18:11:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3559 transitions. [2022-11-25 18:11:58,988 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3887068588903451 [2022-11-25 18:11:58,988 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3559 transitions. [2022-11-25 18:11:58,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3559 transitions. [2022-11-25 18:11:58,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:58,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3559 transitions. [2022-11-25 18:11:58,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 169.47619047619048) internal successors, (3559), 21 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:58,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:58,999 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:58,999 INFO L175 Difference]: Start difference. First operand has 501 places, 796 transitions, 22711 flow. Second operand 21 states and 3559 transitions. [2022-11-25 18:11:59,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 893 transitions, 25307 flow [2022-11-25 18:12:00,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 893 transitions, 25108 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-11-25 18:12:00,403 INFO L231 Difference]: Finished difference. Result has 517 places, 816 transitions, 23767 flow [2022-11-25 18:12:00,404 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=22269, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=23767, PETRI_PLACES=517, PETRI_TRANSITIONS=816} [2022-11-25 18:12:00,405 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 491 predicate places. [2022-11-25 18:12:00,405 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 816 transitions, 23767 flow [2022-11-25 18:12:00,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 163.6153846153846) internal successors, (2127), 13 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:00,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:00,405 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:12:00,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-11-25 18:12:00,405 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:12:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:00,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1568591928, now seen corresponding path program 31 times [2022-11-25 18:12:00,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:00,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629499212] [2022-11-25 18:12:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:00,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:12:01,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:01,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629499212] [2022-11-25 18:12:01,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629499212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:01,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:12:01,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 18:12:01,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863223300] [2022-11-25 18:12:01,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:01,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:12:01,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:01,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:12:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:12:02,669 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 436 [2022-11-25 18:12:02,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 816 transitions, 23767 flow. Second operand has 14 states, 14 states have (on average 164.5) internal successors, (2303), 14 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:02,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:02,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 436 [2022-11-25 18:12:02,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:07,617 INFO L130 PetriNetUnfolder]: 3557/6554 cut-off events. [2022-11-25 18:12:07,618 INFO L131 PetriNetUnfolder]: For 225421/225421 co-relation queries the response was YES. [2022-11-25 18:12:07,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63122 conditions, 6554 events. 3557/6554 cut-off events. For 225421/225421 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 47270 event pairs, 321 based on Foata normal form. 5/6559 useless extension candidates. Maximal degree in co-relation 62893. Up to 2043 conditions per place. [2022-11-25 18:12:07,697 INFO L137 encePairwiseOnDemand]: 424/436 looper letters, 366 selfloop transitions, 526 changer transitions 9/901 dead transitions. [2022-11-25 18:12:07,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 901 transitions, 26103 flow [2022-11-25 18:12:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:12:07,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 18:12:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3746 transitions. [2022-11-25 18:12:07,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.390533778148457 [2022-11-25 18:12:07,702 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3746 transitions. [2022-11-25 18:12:07,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3746 transitions. [2022-11-25 18:12:07,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:07,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3746 transitions. [2022-11-25 18:12:07,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 170.27272727272728) internal successors, (3746), 22 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:07,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 436.0) internal successors, (10028), 23 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:07,712 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 436.0) internal successors, (10028), 23 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:07,712 INFO L175 Difference]: Start difference. First operand has 517 places, 816 transitions, 23767 flow. Second operand 22 states and 3746 transitions. [2022-11-25 18:12:07,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 901 transitions, 26103 flow [2022-11-25 18:12:09,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 901 transitions, 25630 flow, removed 59 selfloop flow, removed 11 redundant places. [2022-11-25 18:12:09,080 INFO L231 Difference]: Finished difference. Result has 527 places, 813 transitions, 24275 flow [2022-11-25 18:12:09,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=23270, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=526, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=24275, PETRI_PLACES=527, PETRI_TRANSITIONS=813} [2022-11-25 18:12:09,081 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 501 predicate places. [2022-11-25 18:12:09,081 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 813 transitions, 24275 flow [2022-11-25 18:12:09,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 164.5) internal successors, (2303), 14 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:09,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:09,081 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:12:09,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-11-25 18:12:09,081 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:12:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 385305744, now seen corresponding path program 32 times [2022-11-25 18:12:09,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:09,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937182708] [2022-11-25 18:12:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:09,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:12:10,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:10,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937182708] [2022-11-25 18:12:10,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937182708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:12:10,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565344439] [2022-11-25 18:12:10,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:12:10,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:12:10,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:12:10,629 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:12:10,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 18:12:10,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:12:10,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:12:10,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:12:10,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:12:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:12:11,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:12:11,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565344439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:11,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:12:11,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 27 [2022-11-25 18:12:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887935629] [2022-11-25 18:12:11,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:11,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:12:11,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:12:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-11-25 18:12:11,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 436 [2022-11-25 18:12:11,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 813 transitions, 24275 flow. Second operand has 11 states, 11 states have (on average 169.9090909090909) internal successors, (1869), 11 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:11,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:11,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 436 [2022-11-25 18:12:11,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:15,356 INFO L130 PetriNetUnfolder]: 3528/6519 cut-off events. [2022-11-25 18:12:15,357 INFO L131 PetriNetUnfolder]: For 236883/236883 co-relation queries the response was YES. [2022-11-25 18:12:15,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62924 conditions, 6519 events. 3528/6519 cut-off events. For 236883/236883 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 47058 event pairs, 1198 based on Foata normal form. 27/6546 useless extension candidates. Maximal degree in co-relation 62696. Up to 4389 conditions per place. [2022-11-25 18:12:15,442 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 551 selfloop transitions, 281 changer transitions 13/845 dead transitions. [2022-11-25 18:12:15,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 845 transitions, 26152 flow [2022-11-25 18:12:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:12:15,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:12:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1768 transitions. [2022-11-25 18:12:15,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4055045871559633 [2022-11-25 18:12:15,445 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1768 transitions. [2022-11-25 18:12:15,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1768 transitions. [2022-11-25 18:12:15,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:15,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1768 transitions. [2022-11-25 18:12:15,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 176.8) internal successors, (1768), 10 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:15,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:12:15,449 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:12:15,449 INFO L175 Difference]: Start difference. First operand has 527 places, 813 transitions, 24275 flow. Second operand 10 states and 1768 transitions. [2022-11-25 18:12:15,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 845 transitions, 26152 flow [2022-11-25 18:12:16,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 845 transitions, 25190 flow, removed 6 selfloop flow, removed 21 redundant places. [2022-11-25 18:12:16,706 INFO L231 Difference]: Finished difference. Result has 514 places, 803 transitions, 23777 flow [2022-11-25 18:12:16,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=23194, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23777, PETRI_PLACES=514, PETRI_TRANSITIONS=803} [2022-11-25 18:12:16,707 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 488 predicate places. [2022-11-25 18:12:16,707 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 803 transitions, 23777 flow [2022-11-25 18:12:16,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.9090909090909) internal successors, (1869), 11 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:16,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:16,708 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:12:16,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 18:12:16,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:12:16,908 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:12:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:16,909 INFO L85 PathProgramCache]: Analyzing trace with hash 78875472, now seen corresponding path program 33 times [2022-11-25 18:12:16,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:16,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331256331] [2022-11-25 18:12:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:16,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:12:18,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331256331] [2022-11-25 18:12:18,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331256331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:12:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912087050] [2022-11-25 18:12:18,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:12:18,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:12:18,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:12:18,524 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:12:18,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 18:12:18,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 18:12:18,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:12:18,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 18:12:18,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:12:19,181 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:12:19,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 38 [2022-11-25 18:12:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:12:19,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:12:19,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912087050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:19,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:12:19,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 27 [2022-11-25 18:12:19,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5989018] [2022-11-25 18:12:19,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:19,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:12:19,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:19,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:12:19,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-11-25 18:12:19,666 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 436 [2022-11-25 18:12:19,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 803 transitions, 23777 flow. Second operand has 11 states, 11 states have (on average 170.9090909090909) internal successors, (1880), 11 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:19,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:19,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 436 [2022-11-25 18:12:19,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:23,048 INFO L130 PetriNetUnfolder]: 3520/6485 cut-off events. [2022-11-25 18:12:23,048 INFO L131 PetriNetUnfolder]: For 227200/227200 co-relation queries the response was YES. [2022-11-25 18:12:23,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62198 conditions, 6485 events. 3520/6485 cut-off events. For 227200/227200 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 46728 event pairs, 491 based on Foata normal form. 1/6486 useless extension candidates. Maximal degree in co-relation 62043. Up to 3206 conditions per place. [2022-11-25 18:12:23,134 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 555 selfloop transitions, 285 changer transitions 5/845 dead transitions. [2022-11-25 18:12:23,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 845 transitions, 25789 flow [2022-11-25 18:12:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:12:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:12:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1789 transitions. [2022-11-25 18:12:23,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4103211009174312 [2022-11-25 18:12:23,136 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1789 transitions. [2022-11-25 18:12:23,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1789 transitions. [2022-11-25 18:12:23,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:23,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1789 transitions. [2022-11-25 18:12:23,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 178.9) internal successors, (1789), 10 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:23,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:12:23,140 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 436.0) internal successors, (4796), 11 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) [2022-11-25 18:12:23,140 INFO L175 Difference]: Start difference. First operand has 514 places, 803 transitions, 23777 flow. Second operand 10 states and 1789 transitions. [2022-11-25 18:12:23,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 845 transitions, 25789 flow [2022-11-25 18:12:24,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 845 transitions, 25443 flow, removed 17 selfloop flow, removed 7 redundant places. [2022-11-25 18:12:24,560 INFO L231 Difference]: Finished difference. Result has 513 places, 806 transitions, 24203 flow [2022-11-25 18:12:24,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=23437, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24203, PETRI_PLACES=513, PETRI_TRANSITIONS=806} [2022-11-25 18:12:24,561 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 487 predicate places. [2022-11-25 18:12:24,561 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 806 transitions, 24203 flow [2022-11-25 18:12:24,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 170.9090909090909) internal successors, (1880), 11 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:24,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:24,562 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:12:24,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-25 18:12:24,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-11-25 18:12:24,768 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:12:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1613257744, now seen corresponding path program 34 times [2022-11-25 18:12:24,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:24,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391696752] [2022-11-25 18:12:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:24,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:12:25,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:25,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391696752] [2022-11-25 18:12:25,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391696752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:25,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:12:25,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 18:12:25,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515290642] [2022-11-25 18:12:25,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:25,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:12:25,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:25,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:12:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:12:26,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 436 [2022-11-25 18:12:26,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 806 transitions, 24203 flow. Second operand has 14 states, 14 states have (on average 163.5) internal successors, (2289), 14 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:26,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:26,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 436 [2022-11-25 18:12:26,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:31,304 INFO L130 PetriNetUnfolder]: 3499/6438 cut-off events. [2022-11-25 18:12:31,304 INFO L131 PetriNetUnfolder]: For 242851/242851 co-relation queries the response was YES. [2022-11-25 18:12:31,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62546 conditions, 6438 events. 3499/6438 cut-off events. For 242851/242851 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 46199 event pairs, 210 based on Foata normal form. 9/6447 useless extension candidates. Maximal degree in co-relation 62391. Up to 3375 conditions per place. [2022-11-25 18:12:31,389 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 465 selfloop transitions, 371 changer transitions 14/850 dead transitions. [2022-11-25 18:12:31,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 850 transitions, 25954 flow [2022-11-25 18:12:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:12:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:12:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2708 transitions. [2022-11-25 18:12:31,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3881880733944954 [2022-11-25 18:12:31,391 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2708 transitions. [2022-11-25 18:12:31,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2708 transitions. [2022-11-25 18:12:31,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:31,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2708 transitions. [2022-11-25 18:12:31,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 169.25) internal successors, (2708), 16 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:31,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 436.0) internal successors, (7412), 17 states have internal predecessors, (7412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:31,397 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 436.0) internal successors, (7412), 17 states have internal predecessors, (7412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:31,397 INFO L175 Difference]: Start difference. First operand has 513 places, 806 transitions, 24203 flow. Second operand 16 states and 2708 transitions. [2022-11-25 18:12:31,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 850 transitions, 25954 flow [2022-11-25 18:12:32,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 850 transitions, 25593 flow, removed 24 selfloop flow, removed 5 redundant places. [2022-11-25 18:12:32,653 INFO L231 Difference]: Finished difference. Result has 525 places, 794 transitions, 24256 flow [2022-11-25 18:12:32,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=23584, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24256, PETRI_PLACES=525, PETRI_TRANSITIONS=794} [2022-11-25 18:12:32,654 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 499 predicate places. [2022-11-25 18:12:32,654 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 794 transitions, 24256 flow [2022-11-25 18:12:32,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.5) internal successors, (2289), 14 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:32,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:32,655 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:12:32,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-11-25 18:12:32,656 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:12:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:32,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1333840592, now seen corresponding path program 35 times [2022-11-25 18:12:32,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:32,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012057606] [2022-11-25 18:12:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:32,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:12:33,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:33,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012057606] [2022-11-25 18:12:33,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012057606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:33,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:12:33,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:12:33,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234122016] [2022-11-25 18:12:33,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:12:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:12:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:12:34,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 436 [2022-11-25 18:12:34,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 794 transitions, 24256 flow. Second operand has 13 states, 13 states have (on average 165.6153846153846) internal successors, (2153), 13 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:34,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:34,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 436 [2022-11-25 18:12:34,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:39,580 INFO L130 PetriNetUnfolder]: 3552/6502 cut-off events. [2022-11-25 18:12:39,580 INFO L131 PetriNetUnfolder]: For 255314/255314 co-relation queries the response was YES. [2022-11-25 18:12:39,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63577 conditions, 6502 events. 3552/6502 cut-off events. For 255314/255314 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 46445 event pairs, 192 based on Foata normal form. 2/6504 useless extension candidates. Maximal degree in co-relation 63419. Up to 1924 conditions per place. [2022-11-25 18:12:39,695 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 339 selfloop transitions, 556 changer transitions 6/901 dead transitions. [2022-11-25 18:12:39,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 901 transitions, 27047 flow [2022-11-25 18:12:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 18:12:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 18:12:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4769 transitions. [2022-11-25 18:12:39,702 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39064547837483615 [2022-11-25 18:12:39,702 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4769 transitions. [2022-11-25 18:12:39,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4769 transitions. [2022-11-25 18:12:39,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:39,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4769 transitions. [2022-11-25 18:12:39,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 170.32142857142858) internal successors, (4769), 28 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:39,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 436.0) internal successors, (12644), 29 states have internal predecessors, (12644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:39,718 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 436.0) internal successors, (12644), 29 states have internal predecessors, (12644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:39,718 INFO L175 Difference]: Start difference. First operand has 525 places, 794 transitions, 24256 flow. Second operand 28 states and 4769 transitions. [2022-11-25 18:12:39,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 901 transitions, 27047 flow [2022-11-25 18:12:41,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 901 transitions, 26250 flow, removed 10 selfloop flow, removed 16 redundant places. [2022-11-25 18:12:41,188 INFO L231 Difference]: Finished difference. Result has 533 places, 808 transitions, 25093 flow [2022-11-25 18:12:41,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=23499, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=25093, PETRI_PLACES=533, PETRI_TRANSITIONS=808} [2022-11-25 18:12:41,189 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 507 predicate places. [2022-11-25 18:12:41,189 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 808 transitions, 25093 flow [2022-11-25 18:12:41,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 165.6153846153846) internal successors, (2153), 13 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:41,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:41,189 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:12:41,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-11-25 18:12:41,190 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:12:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:41,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1058226542, now seen corresponding path program 36 times [2022-11-25 18:12:41,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:41,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550971895] [2022-11-25 18:12:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:41,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:12:43,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:43,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550971895] [2022-11-25 18:12:43,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550971895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:12:43,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890433627] [2022-11-25 18:12:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:12:43,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:12:43,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:12:43,503 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:12:43,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 18:12:43,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 18:12:43,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:12:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 18:12:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:12:44,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:12:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:12:44,274 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 18:12:44,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 40 [2022-11-25 18:12:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:12:44,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:12:44,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890433627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:44,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:12:44,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [21] total 33 [2022-11-25 18:12:44,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409206957] [2022-11-25 18:12:44,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:44,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:12:44,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:12:44,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 18:12:45,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 436 [2022-11-25 18:12:45,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 808 transitions, 25093 flow. Second operand has 14 states, 14 states have (on average 166.5) internal successors, (2331), 14 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:45,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:45,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 436 [2022-11-25 18:12:45,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:50,568 INFO L130 PetriNetUnfolder]: 3550/6489 cut-off events. [2022-11-25 18:12:50,568 INFO L131 PetriNetUnfolder]: For 258251/258251 co-relation queries the response was YES. [2022-11-25 18:12:50,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64008 conditions, 6489 events. 3550/6489 cut-off events. For 258251/258251 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 46222 event pairs, 1361 based on Foata normal form. 1/6490 useless extension candidates. Maximal degree in co-relation 63851. Up to 5211 conditions per place. [2022-11-25 18:12:50,658 INFO L137 encePairwiseOnDemand]: 423/436 looper letters, 601 selfloop transitions, 243 changer transitions 5/849 dead transitions. [2022-11-25 18:12:50,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 849 transitions, 26983 flow [2022-11-25 18:12:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:12:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 18:12:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2581 transitions. [2022-11-25 18:12:50,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3946483180428135 [2022-11-25 18:12:50,661 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2581 transitions. [2022-11-25 18:12:50,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2581 transitions. [2022-11-25 18:12:50,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:50,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2581 transitions. [2022-11-25 18:12:50,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 172.06666666666666) internal successors, (2581), 15 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:50,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 436.0) internal successors, (6976), 16 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:50,667 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 436.0) internal successors, (6976), 16 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:50,667 INFO L175 Difference]: Start difference. First operand has 533 places, 808 transitions, 25093 flow. Second operand 15 states and 2581 transitions. [2022-11-25 18:12:50,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 849 transitions, 26983 flow [2022-11-25 18:12:52,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 849 transitions, 26167 flow, removed 44 selfloop flow, removed 20 redundant places. [2022-11-25 18:12:52,130 INFO L231 Difference]: Finished difference. Result has 526 places, 807 transitions, 24755 flow [2022-11-25 18:12:52,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=24281, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=24755, PETRI_PLACES=526, PETRI_TRANSITIONS=807} [2022-11-25 18:12:52,131 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 500 predicate places. [2022-11-25 18:12:52,131 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 807 transitions, 24755 flow [2022-11-25 18:12:52,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 166.5) internal successors, (2331), 14 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:52,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:52,132 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:12:52,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 18:12:52,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:12:52,333 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:12:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash 816104271, now seen corresponding path program 1 times [2022-11-25 18:12:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:52,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334164319] [2022-11-25 18:12:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:12:52,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334164319] [2022-11-25 18:12:52,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334164319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:52,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:12:52,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:12:52,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570838725] [2022-11-25 18:12:52,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:52,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:12:52,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:52,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:12:52,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:12:53,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 436 [2022-11-25 18:12:53,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 807 transitions, 24755 flow. Second operand has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:53,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:53,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 436 [2022-11-25 18:12:53,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:56,585 INFO L130 PetriNetUnfolder]: 3688/6738 cut-off events. [2022-11-25 18:12:56,586 INFO L131 PetriNetUnfolder]: For 254759/254759 co-relation queries the response was YES. [2022-11-25 18:12:56,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65825 conditions, 6738 events. 3688/6738 cut-off events. For 254759/254759 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 48370 event pairs, 564 based on Foata normal form. 12/6750 useless extension candidates. Maximal degree in co-relation 65673. Up to 3725 conditions per place. [2022-11-25 18:12:56,682 INFO L137 encePairwiseOnDemand]: 425/436 looper letters, 443 selfloop transitions, 444 changer transitions 0/887 dead transitions. [2022-11-25 18:12:56,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 887 transitions, 27590 flow [2022-11-25 18:12:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:12:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 18:12:56,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2703 transitions. [2022-11-25 18:12:56,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.413302752293578 [2022-11-25 18:12:56,685 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2703 transitions. [2022-11-25 18:12:56,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2703 transitions. [2022-11-25 18:12:56,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:56,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2703 transitions. [2022-11-25 18:12:56,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 180.2) internal successors, (2703), 15 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:56,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 436.0) internal successors, (6976), 16 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:56,690 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 436.0) internal successors, (6976), 16 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:56,690 INFO L175 Difference]: Start difference. First operand has 526 places, 807 transitions, 24755 flow. Second operand 15 states and 2703 transitions. [2022-11-25 18:12:56,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 887 transitions, 27590 flow [2022-11-25 18:12:58,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 887 transitions, 27121 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-11-25 18:12:58,144 INFO L231 Difference]: Finished difference. Result has 528 places, 823 transitions, 25786 flow [2022-11-25 18:12:58,145 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=24310, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=25786, PETRI_PLACES=528, PETRI_TRANSITIONS=823} [2022-11-25 18:12:58,145 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 502 predicate places. [2022-11-25 18:12:58,145 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 823 transitions, 25786 flow [2022-11-25 18:12:58,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:58,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:58,146 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:12:58,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-11-25 18:12:58,146 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:12:58,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:58,146 INFO L85 PathProgramCache]: Analyzing trace with hash 505089467, now seen corresponding path program 2 times [2022-11-25 18:12:58,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:58,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102670267] [2022-11-25 18:12:58,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:58,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:12:59,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:59,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102670267] [2022-11-25 18:12:59,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102670267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:12:59,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656887882] [2022-11-25 18:12:59,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:12:59,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:12:59,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:12:59,120 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:12:59,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 18:12:59,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:12:59,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:12:59,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 18:12:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:12:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:12:59,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:12:59,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656887882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:59,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:12:59,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 19 [2022-11-25 18:12:59,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666592620] [2022-11-25 18:12:59,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:59,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:12:59,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:59,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:12:59,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-25 18:12:59,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 436 [2022-11-25 18:12:59,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 823 transitions, 25786 flow. Second operand has 10 states, 10 states have (on average 176.2) internal successors, (1762), 10 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:59,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:59,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 436 [2022-11-25 18:12:59,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:13:03,495 INFO L130 PetriNetUnfolder]: 3773/6888 cut-off events. [2022-11-25 18:13:03,495 INFO L131 PetriNetUnfolder]: For 272286/272286 co-relation queries the response was YES. [2022-11-25 18:13:03,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68148 conditions, 6888 events. 3773/6888 cut-off events. For 272286/272286 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 49651 event pairs, 705 based on Foata normal form. 12/6900 useless extension candidates. Maximal degree in co-relation 67995. Up to 4069 conditions per place. [2022-11-25 18:13:03,601 INFO L137 encePairwiseOnDemand]: 426/436 looper letters, 485 selfloop transitions, 385 changer transitions 7/877 dead transitions. [2022-11-25 18:13:03,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 877 transitions, 28163 flow [2022-11-25 18:13:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:13:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:13:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1652 transitions. [2022-11-25 18:13:03,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42099898063200814 [2022-11-25 18:13:03,603 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1652 transitions. [2022-11-25 18:13:03,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1652 transitions. [2022-11-25 18:13:03,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:13:03,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1652 transitions. [2022-11-25 18:13:03,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 183.55555555555554) internal successors, (1652), 9 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:13:03,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:13:03,608 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:13:03,608 INFO L175 Difference]: Start difference. First operand has 528 places, 823 transitions, 25786 flow. Second operand 9 states and 1652 transitions. [2022-11-25 18:13:03,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 877 transitions, 28163 flow [2022-11-25 18:13:05,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 877 transitions, 27866 flow, removed 27 selfloop flow, removed 9 redundant places. [2022-11-25 18:13:05,328 INFO L231 Difference]: Finished difference. Result has 527 places, 833 transitions, 26731 flow [2022-11-25 18:13:05,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=25392, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=26731, PETRI_PLACES=527, PETRI_TRANSITIONS=833} [2022-11-25 18:13:05,328 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 501 predicate places. [2022-11-25 18:13:05,329 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 833 transitions, 26731 flow [2022-11-25 18:13:05,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.2) internal successors, (1762), 10 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:13:05,329 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:13:05,329 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:13:05,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 18:13:05,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb4090df-4682-4bbb-82e9-77ec2a54374b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:13:05,530 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:13:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:13:05,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2003605105, now seen corresponding path program 3 times [2022-11-25 18:13:05,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:13:05,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895850882] [2022-11-25 18:13:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:13:05,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:13:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:13:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:13:06,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:13:06,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895850882] [2022-11-25 18:13:06,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895850882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:13:06,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:13:06,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 18:13:06,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999175858] [2022-11-25 18:13:06,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:13:06,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:13:06,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:13:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:13:06,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:13:06,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 436 [2022-11-25 18:13:06,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 833 transitions, 26731 flow. Second operand has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:13:06,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:13:06,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 436 [2022-11-25 18:13:06,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand