./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP --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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:17:28,478 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:17:28,600 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:17:28,612 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:17:28,613 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:17:28,648 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:17:28,649 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:17:28,650 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:17:28,651 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:17:28,651 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:17:28,652 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:17:28,653 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:17:28,653 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:17:28,654 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:17:28,655 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:17:28,655 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:17:28,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:17:28,657 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:17:28,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:17:28,658 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:17:28,658 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:17:28,659 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:17:28,660 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:17:28,660 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:17:28,661 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:17:28,662 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:17:28,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:17:28,663 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:17:28,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:17:28,664 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:17:28,665 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:17:28,665 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:17:28,666 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:17:28,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:17:28,667 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:17:28,667 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:17:28,668 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:17:28,668 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:17:28,669 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:17:28,669 INFO L153 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_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2023-11-06 22:17:28,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:17:28,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:17:28,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:17:28,984 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:17:28,985 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:17:28,986 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2023-11-06 22:17:32,164 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:17:32,401 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:17:32,402 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2023-11-06 22:17:32,412 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/data/d9bdfda07/5683406da4ff4eaca85b3f21260549be/FLAGb5a4b1e21 [2023-11-06 22:17:32,433 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/data/d9bdfda07/5683406da4ff4eaca85b3f21260549be [2023-11-06 22:17:32,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:17:32,443 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:17:32,447 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:17:32,448 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:17:32,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:17:32,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e3e6101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32, skipping insertion in model container [2023-11-06 22:17:32,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,493 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:17:32,708 WARN L240 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_12f7bd18-6c6e-42bd-8213-245595ceeaaf/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2023-11-06 22:17:32,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:17:32,738 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:17:32,783 WARN L240 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_12f7bd18-6c6e-42bd-8213-245595ceeaaf/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2023-11-06 22:17:32,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:17:32,802 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:17:32,802 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:17:32,811 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:17:32,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32 WrapperNode [2023-11-06 22:17:32,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:17:32,815 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:17:32,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:17:32,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:17:32,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,861 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 133 [2023-11-06 22:17:32,864 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:17:32,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:17:32,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:17:32,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:17:32,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,928 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,931 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:17:32,932 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:17:32,932 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:17:32,932 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:17:32,933 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (1/1) ... [2023-11-06 22:17:32,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:17:32,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:32,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:17:33,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:17:33,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:17:33,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:17:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:17:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:17:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:17:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:17:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:17:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:17:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:17:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:17:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:17:33,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:17:33,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:17:33,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:17:33,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:17:33,034 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:17:33,207 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:17:33,209 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:17:33,558 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:17:33,696 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:17:33,696 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:17:33,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:17:33 BoogieIcfgContainer [2023-11-06 22:17:33,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:17:33,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:17:33,702 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:17:33,706 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:17:33,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:17:32" (1/3) ... [2023-11-06 22:17:33,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c77c191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:17:33, skipping insertion in model container [2023-11-06 22:17:33,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:32" (2/3) ... [2023-11-06 22:17:33,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c77c191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:17:33, skipping insertion in model container [2023-11-06 22:17:33,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:17:33" (3/3) ... [2023-11-06 22:17:33,710 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-11-06 22:17:33,719 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:17:33,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:17:33,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:17:33,728 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:17:33,788 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:17:33,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 122 transitions, 258 flow [2023-11-06 22:17:33,911 INFO L124 PetriNetUnfolderBase]: 9/120 cut-off events. [2023-11-06 22:17:33,912 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:17:33,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 120 events. 9/120 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-11-06 22:17:33,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 122 transitions, 258 flow [2023-11-06 22:17:33,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 111 transitions, 234 flow [2023-11-06 22:17:33,926 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:17:33,937 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 111 transitions, 234 flow [2023-11-06 22:17:33,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 111 transitions, 234 flow [2023-11-06 22:17:33,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 234 flow [2023-11-06 22:17:33,980 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-06 22:17:33,980 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:17:33,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 111 events. 9/111 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-11-06 22:17:33,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-11-06 22:17:38,343 INFO L134 LiptonReduction]: Checked pairs total: 488 [2023-11-06 22:17:38,343 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-11-06 22:17:38,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:17:38,366 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;@528131e9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:17:38,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:17:38,372 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:17:38,372 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-11-06 22:17:38,372 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:17:38,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:38,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:38,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:38,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:38,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1812186483, now seen corresponding path program 1 times [2023-11-06 22:17:38,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:38,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708792060] [2023-11-06 22:17:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:38,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:38,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:38,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708792060] [2023-11-06 22:17:38,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708792060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:38,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:38,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:17:38,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704362482] [2023-11-06 22:17:38,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:38,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:38,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 241 [2023-11-06 22:17:38,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:38,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:38,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 241 [2023-11-06 22:17:38,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:38,892 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2023-11-06 22:17:38,892 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-06 22:17:38,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 134 event pairs, 9 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2023-11-06 22:17:38,895 INFO L140 encePairwiseOnDemand]: 238/241 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2023-11-06 22:17:38,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2023-11-06 22:17:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:17:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-11-06 22:17:38,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47717842323651455 [2023-11-06 22:17:38,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-11-06 22:17:38,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-11-06 22:17:38,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:38,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-11-06 22:17:38,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:38,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:38,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:38,932 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 345 transitions. [2023-11-06 22:17:38,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2023-11-06 22:17:38,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:17:38,937 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2023-11-06 22:17:38,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-11-06 22:17:38,943 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-11-06 22:17:38,943 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2023-11-06 22:17:38,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:38,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:38,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:38,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:17:38,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:38,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1499956157, now seen corresponding path program 1 times [2023-11-06 22:17:38,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:38,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579731061] [2023-11-06 22:17:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:38,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:39,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:39,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579731061] [2023-11-06 22:17:39,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579731061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:39,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:39,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:17:39,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396291219] [2023-11-06 22:17:39,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:39,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:39,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:39,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 241 [2023-11-06 22:17:39,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:39,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 241 [2023-11-06 22:17:39,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:39,172 INFO L124 PetriNetUnfolderBase]: 52/102 cut-off events. [2023-11-06 22:17:39,172 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-06 22:17:39,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 258 event pairs, 17 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 135. Up to 74 conditions per place. [2023-11-06 22:17:39,176 INFO L140 encePairwiseOnDemand]: 238/241 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-11-06 22:17:39,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2023-11-06 22:17:39,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:17:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-11-06 22:17:39,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702627939142462 [2023-11-06 22:17:39,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-11-06 22:17:39,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-11-06 22:17:39,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:39,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-11-06 22:17:39,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,196 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 340 transitions. [2023-11-06 22:17:39,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2023-11-06 22:17:39,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:17:39,199 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2023-11-06 22:17:39,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-11-06 22:17:39,200 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-11-06 22:17:39,205 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2023-11-06 22:17:39,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:39,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:39,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:17:39,207 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:39,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:39,208 INFO L85 PathProgramCache]: Analyzing trace with hash 642160803, now seen corresponding path program 1 times [2023-11-06 22:17:39,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:39,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501853] [2023-11-06 22:17:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:39,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:39,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:39,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501853] [2023-11-06 22:17:39,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:39,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:39,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:39,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489835356] [2023-11-06 22:17:39,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:39,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:17:39,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:39,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:17:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:17:39,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 241 [2023-11-06 22:17:39,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:39,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 241 [2023-11-06 22:17:39,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:39,602 INFO L124 PetriNetUnfolderBase]: 61/130 cut-off events. [2023-11-06 22:17:39,602 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-06 22:17:39,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 358 event pairs, 44 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 212. Up to 103 conditions per place. [2023-11-06 22:17:39,604 INFO L140 encePairwiseOnDemand]: 237/241 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-11-06 22:17:39,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2023-11-06 22:17:39,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:17:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:17:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 423 transitions. [2023-11-06 22:17:39,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387966804979253 [2023-11-06 22:17:39,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 423 transitions. [2023-11-06 22:17:39,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 423 transitions. [2023-11-06 22:17:39,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:39,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 423 transitions. [2023-11-06 22:17:39,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,614 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,615 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 423 transitions. [2023-11-06 22:17:39,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2023-11-06 22:17:39,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:17:39,617 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2023-11-06 22:17:39,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-11-06 22:17:39,618 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-11-06 22:17:39,618 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2023-11-06 22:17:39,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:39,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:39,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:17:39,620 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:39,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:39,620 INFO L85 PathProgramCache]: Analyzing trace with hash -253782816, now seen corresponding path program 1 times [2023-11-06 22:17:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:39,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540743109] [2023-11-06 22:17:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:39,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:40,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:40,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540743109] [2023-11-06 22:17:40,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540743109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:40,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178126391] [2023-11-06 22:17:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:40,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:40,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:40,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:40,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:17:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:40,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:17:40,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:40,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:17:40,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:17:40,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:17:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:40,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:41,171 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:41,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-11-06 22:17:41,192 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:17:41,192 INFO L351 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 300 treesize of output 271 [2023-11-06 22:17:41,222 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:17:41,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80 [2023-11-06 22:17:41,248 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:17:41,248 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 91 treesize of output 67 [2023-11-06 22:17:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:41,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178126391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:41,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:41,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-06 22:17:41,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669509208] [2023-11-06 22:17:41,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:41,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:17:41,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:17:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=198, Unknown=1, NotChecked=0, Total=272 [2023-11-06 22:17:41,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 241 [2023-11-06 22:17:41,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 17 states, 17 states have (on average 70.05882352941177) internal successors, (1191), 17 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:41,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:41,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 241 [2023-11-06 22:17:41,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:42,828 INFO L124 PetriNetUnfolderBase]: 253/492 cut-off events. [2023-11-06 22:17:42,828 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2023-11-06 22:17:42,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1225 conditions, 492 events. 253/492 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2259 event pairs, 34 based on Foata normal form. 3/491 useless extension candidates. Maximal degree in co-relation 1209. Up to 115 conditions per place. [2023-11-06 22:17:42,835 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 69 selfloop transitions, 28 changer transitions 34/131 dead transitions. [2023-11-06 22:17:42,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 131 transitions, 666 flow [2023-11-06 22:17:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:17:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:17:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1355 transitions. [2023-11-06 22:17:42,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3123559243891194 [2023-11-06 22:17:42,846 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1355 transitions. [2023-11-06 22:17:42,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1355 transitions. [2023-11-06 22:17:42,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:42,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1355 transitions. [2023-11-06 22:17:42,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 75.27777777777777) internal successors, (1355), 18 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 241.0) internal successors, (4579), 19 states have internal predecessors, (4579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,872 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 241.0) internal successors, (4579), 19 states have internal predecessors, (4579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,872 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 18 states and 1355 transitions. [2023-11-06 22:17:42,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 131 transitions, 666 flow [2023-11-06 22:17:42,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 131 transitions, 650 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-06 22:17:42,878 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 279 flow [2023-11-06 22:17:42,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=279, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-11-06 22:17:42,880 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 26 predicate places. [2023-11-06 22:17:42,880 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 279 flow [2023-11-06 22:17:42,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 70.05882352941177) internal successors, (1191), 17 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:42,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:42,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:42,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:43,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:43,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:43,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:43,090 INFO L85 PathProgramCache]: Analyzing trace with hash 712797206, now seen corresponding path program 2 times [2023-11-06 22:17:43,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:43,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399157058] [2023-11-06 22:17:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:43,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:43,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399157058] [2023-11-06 22:17:43,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399157058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:43,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473666213] [2023-11-06 22:17:43,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:17:43,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:43,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:43,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:43,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:17:43,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:17:43,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:43,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:17:43,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:43,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:17:44,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:17:44,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:44,186 INFO L351 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 20 treesize of output 15 [2023-11-06 22:17:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:44,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:44,772 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:44,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-11-06 22:17:44,789 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:44,789 INFO L351 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 100 treesize of output 92 [2023-11-06 22:17:44,812 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:44,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 57 treesize of output 53 [2023-11-06 22:17:44,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2023-11-06 22:17:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:45,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473666213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:45,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:45,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-06 22:17:45,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040955575] [2023-11-06 22:17:45,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:45,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:17:45,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:17:45,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:17:46,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 241 [2023-11-06 22:17:46,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 279 flow. Second operand has 18 states, 18 states have (on average 83.16666666666667) internal successors, (1497), 18 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) [2023-11-06 22:17:46,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:46,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 241 [2023-11-06 22:17:46,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:46,889 INFO L124 PetriNetUnfolderBase]: 317/606 cut-off events. [2023-11-06 22:17:46,889 INFO L125 PetriNetUnfolderBase]: For 860/860 co-relation queries the response was YES. [2023-11-06 22:17:46,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1857 conditions, 606 events. 317/606 cut-off events. For 860/860 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2870 event pairs, 106 based on Foata normal form. 4/609 useless extension candidates. Maximal degree in co-relation 1233. Up to 199 conditions per place. [2023-11-06 22:17:46,895 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 31 selfloop transitions, 5 changer transitions 43/79 dead transitions. [2023-11-06 22:17:46,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 558 flow [2023-11-06 22:17:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:17:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:17:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 704 transitions. [2023-11-06 22:17:46,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3651452282157676 [2023-11-06 22:17:46,901 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 704 transitions. [2023-11-06 22:17:46,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 704 transitions. [2023-11-06 22:17:46,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:46,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 704 transitions. [2023-11-06 22:17:46,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:46,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 241.0) internal successors, (2169), 9 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:46,912 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 241.0) internal successors, (2169), 9 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:46,912 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 279 flow. Second operand 8 states and 704 transitions. [2023-11-06 22:17:46,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 558 flow [2023-11-06 22:17:46,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 530 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-11-06 22:17:46,923 INFO L231 Difference]: Finished difference. Result has 53 places, 31 transitions, 184 flow [2023-11-06 22:17:46,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=31} [2023-11-06 22:17:46,924 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 34 predicate places. [2023-11-06 22:17:46,924 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 31 transitions, 184 flow [2023-11-06 22:17:46,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 83.16666666666667) internal successors, (1497), 18 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) [2023-11-06 22:17:46,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:46,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:46,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:47,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:47,136 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:47,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:47,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1309422329, now seen corresponding path program 3 times [2023-11-06 22:17:47,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:47,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875265063] [2023-11-06 22:17:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:47,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:48,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:48,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875265063] [2023-11-06 22:17:48,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875265063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:48,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616256855] [2023-11-06 22:17:48,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:17:48,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:48,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:48,342 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:48,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:17:48,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:17:48,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:48,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:17:48,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:48,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:48,585 INFO L351 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 20 treesize of output 15 [2023-11-06 22:17:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:17:48,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:48,725 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:48,726 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-06 22:17:48,739 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-06 22:17:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:17:48,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616256855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:48,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:48,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-11-06 22:17:48,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836142127] [2023-11-06 22:17:48,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:48,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:17:48,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:17:48,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=197, Unknown=2, NotChecked=0, Total=240 [2023-11-06 22:17:49,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 241 [2023-11-06 22:17:49,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 31 transitions, 184 flow. Second operand has 16 states, 16 states have (on average 73.1875) internal successors, (1171), 16 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:49,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:49,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 241 [2023-11-06 22:17:49,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:49,713 INFO L124 PetriNetUnfolderBase]: 172/337 cut-off events. [2023-11-06 22:17:49,713 INFO L125 PetriNetUnfolderBase]: For 736/736 co-relation queries the response was YES. [2023-11-06 22:17:49,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1125 conditions, 337 events. 172/337 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1366 event pairs, 45 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 1101. Up to 78 conditions per place. [2023-11-06 22:17:49,717 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 40 selfloop transitions, 18 changer transitions 16/74 dead transitions. [2023-11-06 22:17:49,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 74 transitions, 497 flow [2023-11-06 22:17:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:17:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:17:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 846 transitions. [2023-11-06 22:17:49,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3191248585439457 [2023-11-06 22:17:49,723 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 846 transitions. [2023-11-06 22:17:49,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 846 transitions. [2023-11-06 22:17:49,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:49,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 846 transitions. [2023-11-06 22:17:49,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.9090909090909) internal successors, (846), 11 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:49,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 241.0) internal successors, (2892), 12 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:49,735 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 241.0) internal successors, (2892), 12 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:49,736 INFO L175 Difference]: Start difference. First operand has 53 places, 31 transitions, 184 flow. Second operand 11 states and 846 transitions. [2023-11-06 22:17:49,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 74 transitions, 497 flow [2023-11-06 22:17:49,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 74 transitions, 437 flow, removed 23 selfloop flow, removed 10 redundant places. [2023-11-06 22:17:49,745 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 232 flow [2023-11-06 22:17:49,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=232, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-11-06 22:17:49,748 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 25 predicate places. [2023-11-06 22:17:49,749 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 232 flow [2023-11-06 22:17:49,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 73.1875) internal successors, (1171), 16 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:49,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:49,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:49,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:49,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:17:49,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:49,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:49,958 INFO L85 PathProgramCache]: Analyzing trace with hash 174064133, now seen corresponding path program 4 times [2023-11-06 22:17:49,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:49,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336225861] [2023-11-06 22:17:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:49,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:17:50,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:50,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336225861] [2023-11-06 22:17:50,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336225861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:50,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588775374] [2023-11-06 22:17:50,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:17:50,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:50,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:50,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:50,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:17:50,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:17:50,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:50,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:17:50,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:17:50,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:17:50,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588775374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:50,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:50,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-06 22:17:50,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048288456] [2023-11-06 22:17:50,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:50,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:17:50,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:50,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:17:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:17:50,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 241 [2023-11-06 22:17:50,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 232 flow. Second operand has 8 states, 8 states have (on average 109.25) internal successors, (874), 8 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:50,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:50,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 241 [2023-11-06 22:17:50,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:50,443 INFO L124 PetriNetUnfolderBase]: 328/639 cut-off events. [2023-11-06 22:17:50,443 INFO L125 PetriNetUnfolderBase]: For 1141/1141 co-relation queries the response was YES. [2023-11-06 22:17:50,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 639 events. 328/639 cut-off events. For 1141/1141 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3137 event pairs, 92 based on Foata normal form. 18/657 useless extension candidates. Maximal degree in co-relation 1190. Up to 268 conditions per place. [2023-11-06 22:17:50,448 INFO L140 encePairwiseOnDemand]: 238/241 looper letters, 48 selfloop transitions, 15 changer transitions 0/63 dead transitions. [2023-11-06 22:17:50,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 504 flow [2023-11-06 22:17:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:17:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:17:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 457 transitions. [2023-11-06 22:17:50,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47406639004149376 [2023-11-06 22:17:50,451 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 457 transitions. [2023-11-06 22:17:50,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 457 transitions. [2023-11-06 22:17:50,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:50,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 457 transitions. [2023-11-06 22:17:50,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:50,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:50,457 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:50,457 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 232 flow. Second operand 4 states and 457 transitions. [2023-11-06 22:17:50,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 504 flow [2023-11-06 22:17:50,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 63 transitions, 458 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-06 22:17:50,463 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 349 flow [2023-11-06 22:17:50,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=349, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-11-06 22:17:50,464 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 24 predicate places. [2023-11-06 22:17:50,464 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 349 flow [2023-11-06 22:17:50,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.25) internal successors, (874), 8 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:50,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:50,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:50,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:50,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:17:50,671 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:50,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:50,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1689394617, now seen corresponding path program 5 times [2023-11-06 22:17:50,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:50,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503676281] [2023-11-06 22:17:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:50,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:51,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:51,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503676281] [2023-11-06 22:17:51,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503676281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:51,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899956334] [2023-11-06 22:17:51,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:17:51,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:51,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:51,303 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:51,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:17:51,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:17:51,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:51,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:17:51,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:51,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:51,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:17:51,537 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:17:51,582 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:17:51,626 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:17:51,789 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:17:51,792 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:51,792 INFO L351 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 19 treesize of output 10 [2023-11-06 22:17:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:51,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:52,271 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:52,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2023-11-06 22:17:52,285 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:17:52,285 INFO L351 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 144 treesize of output 132 [2023-11-06 22:17:52,298 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 22:17:52,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 127 treesize of output 101 [2023-11-06 22:17:52,312 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 22:17:52,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 80 treesize of output 67 [2023-11-06 22:17:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:52,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899956334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:52,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:52,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-06 22:17:52,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617829827] [2023-11-06 22:17:52,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:52,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:17:52,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:17:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=448, Unknown=2, NotChecked=0, Total=552 [2023-11-06 22:17:53,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 241 [2023-11-06 22:17:53,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 349 flow. Second operand has 24 states, 24 states have (on average 69.75) internal successors, (1674), 24 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:53,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:53,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 241 [2023-11-06 22:17:53,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:55,019 INFO L124 PetriNetUnfolderBase]: 506/1001 cut-off events. [2023-11-06 22:17:55,020 INFO L125 PetriNetUnfolderBase]: For 2042/2042 co-relation queries the response was YES. [2023-11-06 22:17:55,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3224 conditions, 1001 events. 506/1001 cut-off events. For 2042/2042 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5539 event pairs, 106 based on Foata normal form. 32/1033 useless extension candidates. Maximal degree in co-relation 3072. Up to 271 conditions per place. [2023-11-06 22:17:55,028 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 66 selfloop transitions, 30 changer transitions 20/116 dead transitions. [2023-11-06 22:17:55,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 116 transitions, 910 flow [2023-11-06 22:17:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:17:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:17:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1108 transitions. [2023-11-06 22:17:55,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30650069156293225 [2023-11-06 22:17:55,037 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1108 transitions. [2023-11-06 22:17:55,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1108 transitions. [2023-11-06 22:17:55,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:55,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1108 transitions. [2023-11-06 22:17:55,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.86666666666666) internal successors, (1108), 15 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:55,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 241.0) internal successors, (3856), 16 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:55,054 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 241.0) internal successors, (3856), 16 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:55,054 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 349 flow. Second operand 15 states and 1108 transitions. [2023-11-06 22:17:55,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 116 transitions, 910 flow [2023-11-06 22:17:55,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 116 transitions, 894 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-11-06 22:17:55,065 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 559 flow [2023-11-06 22:17:55,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=559, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-11-06 22:17:55,070 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 44 predicate places. [2023-11-06 22:17:55,070 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 559 flow [2023-11-06 22:17:55,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 69.75) internal successors, (1674), 24 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:55,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:55,072 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:55,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:55,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:55,280 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:55,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:55,280 INFO L85 PathProgramCache]: Analyzing trace with hash -311923117, now seen corresponding path program 6 times [2023-11-06 22:17:55,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:55,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596841530] [2023-11-06 22:17:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:55,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:56,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:56,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596841530] [2023-11-06 22:17:56,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596841530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:56,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91911214] [2023-11-06 22:17:56,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:17:56,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:56,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:56,088 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:56,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:17:56,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:17:56,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:56,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:17:56,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:17:56,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:56,351 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:17:56,352 INFO L351 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 25 treesize of output 13 [2023-11-06 22:17:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:17:56,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91911214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:56,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:56,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 13 [2023-11-06 22:17:56,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136964841] [2023-11-06 22:17:56,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:56,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:17:56,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:56,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:17:56,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:17:57,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 241 [2023-11-06 22:17:57,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 559 flow. Second operand has 15 states, 15 states have (on average 91.26666666666667) internal successors, (1369), 15 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:57,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:57,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 241 [2023-11-06 22:17:57,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:58,555 INFO L124 PetriNetUnfolderBase]: 784/1508 cut-off events. [2023-11-06 22:17:58,555 INFO L125 PetriNetUnfolderBase]: For 5270/5270 co-relation queries the response was YES. [2023-11-06 22:17:58,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5670 conditions, 1508 events. 784/1508 cut-off events. For 5270/5270 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9101 event pairs, 114 based on Foata normal form. 7/1515 useless extension candidates. Maximal degree in co-relation 4834. Up to 306 conditions per place. [2023-11-06 22:17:58,565 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 82 selfloop transitions, 43 changer transitions 134/259 dead transitions. [2023-11-06 22:17:58,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 259 transitions, 2036 flow [2023-11-06 22:17:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:17:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:17:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2812 transitions. [2023-11-06 22:17:58,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40234654457003866 [2023-11-06 22:17:58,578 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2812 transitions. [2023-11-06 22:17:58,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2812 transitions. [2023-11-06 22:17:58,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:58,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2812 transitions. [2023-11-06 22:17:58,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 96.96551724137932) internal successors, (2812), 29 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:58,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 241.0) internal successors, (7230), 30 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:58,606 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 241.0) internal successors, (7230), 30 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:58,607 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 559 flow. Second operand 29 states and 2812 transitions. [2023-11-06 22:17:58,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 259 transitions, 2036 flow [2023-11-06 22:17:58,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 259 transitions, 1887 flow, removed 65 selfloop flow, removed 6 redundant places. [2023-11-06 22:17:58,633 INFO L231 Difference]: Finished difference. Result has 94 places, 63 transitions, 742 flow [2023-11-06 22:17:58,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=742, PETRI_PLACES=94, PETRI_TRANSITIONS=63} [2023-11-06 22:17:58,634 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 75 predicate places. [2023-11-06 22:17:58,634 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 63 transitions, 742 flow [2023-11-06 22:17:58,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.26666666666667) internal successors, (1369), 15 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:58,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:58,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:58,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:58,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:58,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:17:58,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1514957027, now seen corresponding path program 7 times [2023-11-06 22:17:58,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:58,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990274670] [2023-11-06 22:17:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:58,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:59,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:59,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990274670] [2023-11-06 22:17:59,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990274670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:59,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273882514] [2023-11-06 22:17:59,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:17:59,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:59,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:59,669 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:59,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:17:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:59,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:17:59,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:00,117 INFO L351 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 21 treesize of output 16 [2023-11-06 22:18:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:00,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:00,482 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:00,483 INFO L351 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 44 treesize of output 37 [2023-11-06 22:18:00,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-11-06 22:18:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:00,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273882514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:00,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:00,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-06 22:18:00,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873621680] [2023-11-06 22:18:00,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:00,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:18:00,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:00,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:18:00,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:18:02,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 241 [2023-11-06 22:18:02,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 63 transitions, 742 flow. Second operand has 27 states, 27 states have (on average 84.77777777777777) internal successors, (2289), 27 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) [2023-11-06 22:18:02,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:02,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 241 [2023-11-06 22:18:02,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:05,296 INFO L124 PetriNetUnfolderBase]: 871/1680 cut-off events. [2023-11-06 22:18:05,297 INFO L125 PetriNetUnfolderBase]: For 8182/8182 co-relation queries the response was YES. [2023-11-06 22:18:05,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6778 conditions, 1680 events. 871/1680 cut-off events. For 8182/8182 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10068 event pairs, 169 based on Foata normal form. 7/1687 useless extension candidates. Maximal degree in co-relation 6736. Up to 461 conditions per place. [2023-11-06 22:18:05,312 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 72 selfloop transitions, 50 changer transitions 89/211 dead transitions. [2023-11-06 22:18:05,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 211 transitions, 1978 flow [2023-11-06 22:18:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:18:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:18:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2325 transitions. [2023-11-06 22:18:05,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37105011171401214 [2023-11-06 22:18:05,324 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2325 transitions. [2023-11-06 22:18:05,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2325 transitions. [2023-11-06 22:18:05,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:05,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2325 transitions. [2023-11-06 22:18:05,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 89.42307692307692) internal successors, (2325), 26 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 241.0) internal successors, (6507), 27 states have internal predecessors, (6507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,349 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 241.0) internal successors, (6507), 27 states have internal predecessors, (6507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,349 INFO L175 Difference]: Start difference. First operand has 94 places, 63 transitions, 742 flow. Second operand 26 states and 2325 transitions. [2023-11-06 22:18:05,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 211 transitions, 1978 flow [2023-11-06 22:18:05,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 211 transitions, 1645 flow, removed 97 selfloop flow, removed 16 redundant places. [2023-11-06 22:18:05,421 INFO L231 Difference]: Finished difference. Result has 107 places, 85 transitions, 1021 flow [2023-11-06 22:18:05,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1021, PETRI_PLACES=107, PETRI_TRANSITIONS=85} [2023-11-06 22:18:05,423 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 88 predicate places. [2023-11-06 22:18:05,423 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 85 transitions, 1021 flow [2023-11-06 22:18:05,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.77777777777777) internal successors, (2289), 27 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) [2023-11-06 22:18:05,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:05,425 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:05,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:05,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:18:05,632 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:05,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:05,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1591120230, now seen corresponding path program 8 times [2023-11-06 22:18:05,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:05,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023843450] [2023-11-06 22:18:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:05,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:18:05,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023843450] [2023-11-06 22:18:05,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023843450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571942074] [2023-11-06 22:18:05,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:05,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:05,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:05,766 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:05,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:18:05,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:05,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:05,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:18:05,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:18:05,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:18:06,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571942074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:06,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:06,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2023-11-06 22:18:06,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943057935] [2023-11-06 22:18:06,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:06,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:18:06,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:06,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:18:06,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:18:06,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 241 [2023-11-06 22:18:06,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 85 transitions, 1021 flow. Second operand has 11 states, 11 states have (on average 108.72727272727273) internal successors, (1196), 11 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:06,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 241 [2023-11-06 22:18:06,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:06,771 INFO L124 PetriNetUnfolderBase]: 1477/2768 cut-off events. [2023-11-06 22:18:06,771 INFO L125 PetriNetUnfolderBase]: For 12884/12884 co-relation queries the response was YES. [2023-11-06 22:18:06,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11112 conditions, 2768 events. 1477/2768 cut-off events. For 12884/12884 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18173 event pairs, 301 based on Foata normal form. 24/2792 useless extension candidates. Maximal degree in co-relation 11008. Up to 943 conditions per place. [2023-11-06 22:18:06,797 INFO L140 encePairwiseOnDemand]: 238/241 looper letters, 82 selfloop transitions, 73 changer transitions 0/155 dead transitions. [2023-11-06 22:18:06,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 155 transitions, 2103 flow [2023-11-06 22:18:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-11-06 22:18:06,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755186721991701 [2023-11-06 22:18:06,800 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-11-06 22:18:06,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-11-06 22:18:06,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:06,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-11-06 22:18:06,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 241.0) internal successors, (1446), 6 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,816 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 241.0) internal successors, (1446), 6 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,817 INFO L175 Difference]: Start difference. First operand has 107 places, 85 transitions, 1021 flow. Second operand 5 states and 573 transitions. [2023-11-06 22:18:06,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 155 transitions, 2103 flow [2023-11-06 22:18:06,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 155 transitions, 1902 flow, removed 76 selfloop flow, removed 17 redundant places. [2023-11-06 22:18:06,880 INFO L231 Difference]: Finished difference. Result has 78 places, 128 transitions, 1680 flow [2023-11-06 22:18:06,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1680, PETRI_PLACES=78, PETRI_TRANSITIONS=128} [2023-11-06 22:18:06,882 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 59 predicate places. [2023-11-06 22:18:06,882 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 128 transitions, 1680 flow [2023-11-06 22:18:06,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.72727272727273) internal successors, (1196), 11 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:06,883 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:06,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:07,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:18:07,093 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:07,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:07,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1670793938, now seen corresponding path program 9 times [2023-11-06 22:18:07,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:07,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057483152] [2023-11-06 22:18:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:07,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:07,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:07,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057483152] [2023-11-06 22:18:07,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057483152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:07,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230158696] [2023-11-06 22:18:07,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:18:07,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:07,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:07,933 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:07,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:18:08,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:18:08,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:08,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:18:08,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:08,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:08,433 INFO L351 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 20 treesize of output 15 [2023-11-06 22:18:08,728 INFO L322 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-11-06 22:18:08,728 INFO L351 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 34 treesize of output 13 [2023-11-06 22:18:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:08,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:09,237 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-06 22:18:09,239 INFO L351 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 74 treesize of output 61 [2023-11-06 22:18:09,256 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:18:09,256 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 26 [2023-11-06 22:18:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:09,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230158696] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:09,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:09,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-06 22:18:09,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263173430] [2023-11-06 22:18:09,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:09,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:18:09,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:18:09,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=930, Unknown=1, NotChecked=0, Total=1056 [2023-11-06 22:18:12,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 241 [2023-11-06 22:18:12,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 128 transitions, 1680 flow. Second operand has 33 states, 33 states have (on average 72.54545454545455) internal successors, (2394), 33 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:12,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:12,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 241 [2023-11-06 22:18:12,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:15,708 INFO L124 PetriNetUnfolderBase]: 2241/4260 cut-off events. [2023-11-06 22:18:15,709 INFO L125 PetriNetUnfolderBase]: For 15766/15766 co-relation queries the response was YES. [2023-11-06 22:18:15,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16004 conditions, 4260 events. 2241/4260 cut-off events. For 15766/15766 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30475 event pairs, 511 based on Foata normal form. 77/4337 useless extension candidates. Maximal degree in co-relation 10921. Up to 1897 conditions per place. [2023-11-06 22:18:15,746 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 154 selfloop transitions, 53 changer transitions 131/338 dead transitions. [2023-11-06 22:18:15,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 338 transitions, 3731 flow [2023-11-06 22:18:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:18:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:18:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2255 transitions. [2023-11-06 22:18:15,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3226498783803119 [2023-11-06 22:18:15,756 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2255 transitions. [2023-11-06 22:18:15,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2255 transitions. [2023-11-06 22:18:15,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:15,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2255 transitions. [2023-11-06 22:18:15,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 77.75862068965517) internal successors, (2255), 29 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 241.0) internal successors, (7230), 30 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,779 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 241.0) internal successors, (7230), 30 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,779 INFO L175 Difference]: Start difference. First operand has 78 places, 128 transitions, 1680 flow. Second operand 29 states and 2255 transitions. [2023-11-06 22:18:15,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 338 transitions, 3731 flow [2023-11-06 22:18:15,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 338 transitions, 3659 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-11-06 22:18:15,858 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 2007 flow [2023-11-06 22:18:15,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2007, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2023-11-06 22:18:15,859 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 105 predicate places. [2023-11-06 22:18:15,859 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 2007 flow [2023-11-06 22:18:15,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 72.54545454545455) internal successors, (2394), 33 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:15,861 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:15,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:16,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:18:16,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:16,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash -898984512, now seen corresponding path program 10 times [2023-11-06 22:18:16,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:16,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073711314] [2023-11-06 22:18:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:16,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:16,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:16,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073711314] [2023-11-06 22:18:16,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073711314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:16,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827442556] [2023-11-06 22:18:16,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:18:16,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:16,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:16,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:16,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:18:16,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:18:16,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:16,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:18:16,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:17,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:17,467 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:18:17,467 INFO L351 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 25 treesize of output 13 [2023-11-06 22:18:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:17,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827442556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:17,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:17,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-06 22:18:17,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885618044] [2023-11-06 22:18:17,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:18:17,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:18:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:18:18,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 241 [2023-11-06 22:18:18,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 2007 flow. Second operand has 33 states, 33 states have (on average 88.72727272727273) internal successors, (2928), 33 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:18,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:18,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 241 [2023-11-06 22:18:18,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:21,811 INFO L124 PetriNetUnfolderBase]: 1972/3764 cut-off events. [2023-11-06 22:18:21,811 INFO L125 PetriNetUnfolderBase]: For 21140/21140 co-relation queries the response was YES. [2023-11-06 22:18:21,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15550 conditions, 3764 events. 1972/3764 cut-off events. For 21140/21140 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26059 event pairs, 133 based on Foata normal form. 10/3774 useless extension candidates. Maximal degree in co-relation 15458. Up to 780 conditions per place. [2023-11-06 22:18:21,838 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 106 selfloop transitions, 122 changer transitions 174/402 dead transitions. [2023-11-06 22:18:21,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 402 transitions, 4015 flow [2023-11-06 22:18:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:18:21,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 22:18:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3780 transitions. [2023-11-06 22:18:21,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3921161825726141 [2023-11-06 22:18:21,858 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3780 transitions. [2023-11-06 22:18:21,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3780 transitions. [2023-11-06 22:18:21,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:21,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3780 transitions. [2023-11-06 22:18:21,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 94.5) internal successors, (3780), 40 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:21,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 241.0) internal successors, (9881), 41 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:21,884 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 241.0) internal successors, (9881), 41 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:21,884 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 2007 flow. Second operand 40 states and 3780 transitions. [2023-11-06 22:18:21,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 402 transitions, 4015 flow [2023-11-06 22:18:22,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 402 transitions, 3798 flow, removed 86 selfloop flow, removed 18 redundant places. [2023-11-06 22:18:22,048 INFO L231 Difference]: Finished difference. Result has 139 places, 149 transitions, 2219 flow [2023-11-06 22:18:22,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2219, PETRI_PLACES=139, PETRI_TRANSITIONS=149} [2023-11-06 22:18:22,049 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 120 predicate places. [2023-11-06 22:18:22,049 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 149 transitions, 2219 flow [2023-11-06 22:18:22,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.72727272727273) internal successors, (2928), 33 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:22,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:22,051 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:22,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:22,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:18:22,257 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:22,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1074526218, now seen corresponding path program 11 times [2023-11-06 22:18:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905331857] [2023-11-06 22:18:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:22,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:23,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:23,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905331857] [2023-11-06 22:18:23,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905331857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:23,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352633969] [2023-11-06 22:18:23,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:18:23,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:23,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:23,005 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:23,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:18:23,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:18:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:23,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:18:23,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:23,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:18:23,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:18:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:23,558 INFO L351 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 20 treesize of output 15 [2023-11-06 22:18:23,795 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:18:23,796 INFO L351 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 23 treesize of output 10 [2023-11-06 22:18:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:23,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:23,921 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_364 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_364) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2023-11-06 22:18:24,323 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:24,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2023-11-06 22:18:24,348 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:24,348 INFO L351 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 186 treesize of output 170 [2023-11-06 22:18:24,368 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:24,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 53 treesize of output 50 [2023-11-06 22:18:24,469 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2023-11-06 22:18:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-06 22:18:24,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352633969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:24,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:24,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-11-06 22:18:24,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139262741] [2023-11-06 22:18:24,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:24,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:18:24,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:18:24,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1054, Unknown=1, NotChecked=66, Total=1260 [2023-11-06 22:18:24,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 241 [2023-11-06 22:18:24,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 149 transitions, 2219 flow. Second operand has 36 states, 36 states have (on average 69.58333333333333) internal successors, (2505), 36 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:24,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:24,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 241 [2023-11-06 22:18:24,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:27,238 INFO L124 PetriNetUnfolderBase]: 1731/3244 cut-off events. [2023-11-06 22:18:27,238 INFO L125 PetriNetUnfolderBase]: For 16958/16958 co-relation queries the response was YES. [2023-11-06 22:18:27,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13480 conditions, 3244 events. 1731/3244 cut-off events. For 16958/16958 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21660 event pairs, 605 based on Foata normal form. 2/3246 useless extension candidates. Maximal degree in co-relation 13351. Up to 2521 conditions per place. [2023-11-06 22:18:27,306 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 122 selfloop transitions, 23 changer transitions 47/192 dead transitions. [2023-11-06 22:18:27,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 192 transitions, 2725 flow [2023-11-06 22:18:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:18:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:18:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1094 transitions. [2023-11-06 22:18:27,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30262793914246194 [2023-11-06 22:18:27,309 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1094 transitions. [2023-11-06 22:18:27,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1094 transitions. [2023-11-06 22:18:27,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:27,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1094 transitions. [2023-11-06 22:18:27,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.93333333333334) internal successors, (1094), 15 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:27,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 241.0) internal successors, (3856), 16 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:27,316 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 241.0) internal successors, (3856), 16 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:27,316 INFO L175 Difference]: Start difference. First operand has 139 places, 149 transitions, 2219 flow. Second operand 15 states and 1094 transitions. [2023-11-06 22:18:27,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 192 transitions, 2725 flow [2023-11-06 22:18:27,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 192 transitions, 2287 flow, removed 83 selfloop flow, removed 24 redundant places. [2023-11-06 22:18:27,373 INFO L231 Difference]: Finished difference. Result has 110 places, 140 transitions, 1732 flow [2023-11-06 22:18:27,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1732, PETRI_PLACES=110, PETRI_TRANSITIONS=140} [2023-11-06 22:18:27,374 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 91 predicate places. [2023-11-06 22:18:27,374 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 140 transitions, 1732 flow [2023-11-06 22:18:27,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 69.58333333333333) internal successors, (2505), 36 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:27,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:27,375 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:27,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:27,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:18:27,579 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:27,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:27,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1237460839, now seen corresponding path program 12 times [2023-11-06 22:18:27,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:27,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020287579] [2023-11-06 22:18:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:27,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:28,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:28,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020287579] [2023-11-06 22:18:28,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020287579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:28,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758513345] [2023-11-06 22:18:28,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:18:28,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:28,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:28,575 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:28,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:18:28,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:18:28,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:28,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:18:28,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:29,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:29,118 INFO L351 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 21 treesize of output 16 [2023-11-06 22:18:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:29,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:29,269 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_401 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_401) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2023-11-06 22:18:29,295 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:29,296 INFO L351 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 44 treesize of output 37 [2023-11-06 22:18:29,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-11-06 22:18:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 3 not checked. [2023-11-06 22:18:29,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758513345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:29,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:29,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 29 [2023-11-06 22:18:29,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713981572] [2023-11-06 22:18:29,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:29,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:18:29,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:29,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:18:29,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=789, Unknown=1, NotChecked=56, Total=930 [2023-11-06 22:18:29,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 241 [2023-11-06 22:18:29,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 140 transitions, 1732 flow. Second operand has 31 states, 31 states have (on average 72.61290322580645) internal successors, (2251), 31 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:29,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:29,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 241 [2023-11-06 22:18:29,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:31,686 INFO L124 PetriNetUnfolderBase]: 2346/4339 cut-off events. [2023-11-06 22:18:31,686 INFO L125 PetriNetUnfolderBase]: For 18579/18579 co-relation queries the response was YES. [2023-11-06 22:18:31,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16182 conditions, 4339 events. 2346/4339 cut-off events. For 18579/18579 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30705 event pairs, 240 based on Foata normal form. 13/4352 useless extension candidates. Maximal degree in co-relation 16138. Up to 876 conditions per place. [2023-11-06 22:18:31,720 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 74 selfloop transitions, 168 changer transitions 54/296 dead transitions. [2023-11-06 22:18:31,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 296 transitions, 3350 flow [2023-11-06 22:18:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:18:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:18:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1799 transitions. [2023-11-06 22:18:31,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32455349088941005 [2023-11-06 22:18:31,724 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1799 transitions. [2023-11-06 22:18:31,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1799 transitions. [2023-11-06 22:18:31,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:31,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1799 transitions. [2023-11-06 22:18:31,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 78.21739130434783) internal successors, (1799), 23 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:31,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 241.0) internal successors, (5784), 24 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:31,737 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 241.0) internal successors, (5784), 24 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:31,737 INFO L175 Difference]: Start difference. First operand has 110 places, 140 transitions, 1732 flow. Second operand 23 states and 1799 transitions. [2023-11-06 22:18:31,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 296 transitions, 3350 flow [2023-11-06 22:18:31,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 296 transitions, 3091 flow, removed 80 selfloop flow, removed 13 redundant places. [2023-11-06 22:18:31,826 INFO L231 Difference]: Finished difference. Result has 115 places, 187 transitions, 2849 flow [2023-11-06 22:18:31,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2849, PETRI_PLACES=115, PETRI_TRANSITIONS=187} [2023-11-06 22:18:31,828 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 96 predicate places. [2023-11-06 22:18:31,829 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 187 transitions, 2849 flow [2023-11-06 22:18:31,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 72.61290322580645) internal successors, (2251), 31 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:31,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:31,830 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:31,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:32,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:32,036 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:32,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1841749387, now seen corresponding path program 13 times [2023-11-06 22:18:32,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:32,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083882245] [2023-11-06 22:18:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:32,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:18:32,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083882245] [2023-11-06 22:18:32,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083882245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521990762] [2023-11-06 22:18:32,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:18:32,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:32,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:32,179 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:32,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:18:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:32,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:18:32,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:18:32,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:18:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521990762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:32,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:32,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 13 [2023-11-06 22:18:32,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979084434] [2023-11-06 22:18:32,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:32,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:18:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:18:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:18:32,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 241 [2023-11-06 22:18:32,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 187 transitions, 2849 flow. Second operand has 14 states, 14 states have (on average 108.0) internal successors, (1512), 14 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:32,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:32,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 241 [2023-11-06 22:18:32,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:33,762 INFO L124 PetriNetUnfolderBase]: 4278/7865 cut-off events. [2023-11-06 22:18:33,763 INFO L125 PetriNetUnfolderBase]: For 42251/42251 co-relation queries the response was YES. [2023-11-06 22:18:33,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30419 conditions, 7865 events. 4278/7865 cut-off events. For 42251/42251 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 60797 event pairs, 723 based on Foata normal form. 18/7883 useless extension candidates. Maximal degree in co-relation 27119. Up to 2387 conditions per place. [2023-11-06 22:18:33,933 INFO L140 encePairwiseOnDemand]: 238/241 looper letters, 130 selfloop transitions, 212 changer transitions 0/342 dead transitions. [2023-11-06 22:18:33,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 342 transitions, 5801 flow [2023-11-06 22:18:33,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:18:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:18:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 689 transitions. [2023-11-06 22:18:33,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47648686030428766 [2023-11-06 22:18:33,937 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 689 transitions. [2023-11-06 22:18:33,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 689 transitions. [2023-11-06 22:18:33,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:33,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 689 transitions. [2023-11-06 22:18:33,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:33,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 241.0) internal successors, (1687), 7 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:33,944 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 241.0) internal successors, (1687), 7 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:33,945 INFO L175 Difference]: Start difference. First operand has 115 places, 187 transitions, 2849 flow. Second operand 6 states and 689 transitions. [2023-11-06 22:18:33,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 342 transitions, 5801 flow [2023-11-06 22:18:34,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 342 transitions, 5696 flow, removed 45 selfloop flow, removed 6 redundant places. [2023-11-06 22:18:34,125 INFO L231 Difference]: Finished difference. Result has 115 places, 308 transitions, 5381 flow [2023-11-06 22:18:34,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5381, PETRI_PLACES=115, PETRI_TRANSITIONS=308} [2023-11-06 22:18:34,126 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 96 predicate places. [2023-11-06 22:18:34,126 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 308 transitions, 5381 flow [2023-11-06 22:18:34,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.0) internal successors, (1512), 14 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:34,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:34,127 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:34,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:34,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:18:34,333 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:34,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1043330899, now seen corresponding path program 14 times [2023-11-06 22:18:34,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:34,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320706940] [2023-11-06 22:18:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:35,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:35,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320706940] [2023-11-06 22:18:35,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320706940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:35,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619375913] [2023-11-06 22:18:35,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:35,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:35,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:35,120 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:35,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:18:35,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:35,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:35,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 22:18:35,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:35,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:18:35,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:18:35,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:18:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:35,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:36,863 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:36,863 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-11-06 22:18:36,877 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:18:36,877 INFO L351 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 148 treesize of output 133 [2023-11-06 22:18:36,892 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:18:36,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 88 [2023-11-06 22:18:36,908 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:18:36,908 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 116 treesize of output 88 [2023-11-06 22:18:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:37,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619375913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:37,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:37,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-11-06 22:18:37,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293429281] [2023-11-06 22:18:37,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:37,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 22:18:37,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:37,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 22:18:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1614, Unknown=2, NotChecked=0, Total=1892 [2023-11-06 22:18:38,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 241 [2023-11-06 22:18:38,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 308 transitions, 5381 flow. Second operand has 44 states, 44 states have (on average 69.31818181818181) internal successors, (3050), 44 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:38,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:38,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 241 [2023-11-06 22:18:38,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:41,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:47,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:50,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:59,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:19:12,937 INFO L124 PetriNetUnfolderBase]: 7456/13965 cut-off events. [2023-11-06 22:19:12,938 INFO L125 PetriNetUnfolderBase]: For 74121/74121 co-relation queries the response was YES. [2023-11-06 22:19:12,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57436 conditions, 13965 events. 7456/13965 cut-off events. For 74121/74121 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 120343 event pairs, 1223 based on Foata normal form. 295/14260 useless extension candidates. Maximal degree in co-relation 49454. Up to 4817 conditions per place. [2023-11-06 22:19:13,043 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 627 selfloop transitions, 330 changer transitions 618/1575 dead transitions. [2023-11-06 22:19:13,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1575 transitions, 16366 flow [2023-11-06 22:19:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2023-11-06 22:19:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2023-11-06 22:19:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 11913 transitions. [2023-11-06 22:19:13,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31485054311916905 [2023-11-06 22:19:13,079 INFO L72 ComplementDD]: Start complementDD. Operand 157 states and 11913 transitions. [2023-11-06 22:19:13,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 157 states and 11913 transitions. [2023-11-06 22:19:13,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:13,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 157 states and 11913 transitions. [2023-11-06 22:19:13,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 158 states, 157 states have (on average 75.87898089171975) internal successors, (11913), 157 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:13,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 158 states, 158 states have (on average 241.0) internal successors, (38078), 158 states have internal predecessors, (38078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:13,183 INFO L81 ComplementDD]: Finished complementDD. Result has 158 states, 158 states have (on average 241.0) internal successors, (38078), 158 states have internal predecessors, (38078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:13,183 INFO L175 Difference]: Start difference. First operand has 115 places, 308 transitions, 5381 flow. Second operand 157 states and 11913 transitions. [2023-11-06 22:19:13,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1575 transitions, 16366 flow [2023-11-06 22:19:13,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 1575 transitions, 16108 flow, removed 129 selfloop flow, removed 0 redundant places. [2023-11-06 22:19:13,768 INFO L231 Difference]: Finished difference. Result has 323 places, 541 transitions, 9213 flow [2023-11-06 22:19:13,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=5245, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=157, PETRI_FLOW=9213, PETRI_PLACES=323, PETRI_TRANSITIONS=541} [2023-11-06 22:19:13,770 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 304 predicate places. [2023-11-06 22:19:13,770 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 541 transitions, 9213 flow [2023-11-06 22:19:13,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 69.31818181818181) internal successors, (3050), 44 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:13,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:13,771 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:13,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:13,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:19:13,978 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:13,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1619938713, now seen corresponding path program 15 times [2023-11-06 22:19:13,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:13,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667444957] [2023-11-06 22:19:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:13,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:14,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667444957] [2023-11-06 22:19:14,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667444957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393353519] [2023-11-06 22:19:14,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:19:14,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:14,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:14,921 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:14,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:19:15,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:19:15,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:15,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:19:15,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:15,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:19:15,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:19:15,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:19:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:16,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:17,093 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:17,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-11-06 22:19:17,109 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:19:17,110 INFO L351 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 140 treesize of output 127 [2023-11-06 22:19:17,123 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:19:17,124 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 85 [2023-11-06 22:19:17,138 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:19:17,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 112 treesize of output 88 [2023-11-06 22:19:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:17,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393353519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:17,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:17,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2023-11-06 22:19:17,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807349349] [2023-11-06 22:19:17,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:17,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 22:19:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 22:19:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1183, Unknown=4, NotChecked=0, Total=1406 [2023-11-06 22:19:20,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 241 [2023-11-06 22:19:20,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 541 transitions, 9213 flow. Second operand has 38 states, 38 states have (on average 69.52631578947368) internal successors, (2642), 38 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:20,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:20,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 241 [2023-11-06 22:19:20,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:28,540 INFO L124 PetriNetUnfolderBase]: 6314/11944 cut-off events. [2023-11-06 22:19:28,540 INFO L125 PetriNetUnfolderBase]: For 86889/86889 co-relation queries the response was YES. [2023-11-06 22:19:28,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52667 conditions, 11944 events. 6314/11944 cut-off events. For 86889/86889 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 98890 event pairs, 1890 based on Foata normal form. 161/12105 useless extension candidates. Maximal degree in co-relation 52386. Up to 5374 conditions per place. [2023-11-06 22:19:28,674 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 248 selfloop transitions, 35 changer transitions 450/733 dead transitions. [2023-11-06 22:19:28,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 733 transitions, 11564 flow [2023-11-06 22:19:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:19:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:19:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2405 transitions. [2023-11-06 22:19:28,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31185165975103735 [2023-11-06 22:19:28,682 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2405 transitions. [2023-11-06 22:19:28,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2405 transitions. [2023-11-06 22:19:28,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:28,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2405 transitions. [2023-11-06 22:19:28,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 75.15625) internal successors, (2405), 32 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:28,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 241.0) internal successors, (7953), 33 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:28,704 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 241.0) internal successors, (7953), 33 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:28,704 INFO L175 Difference]: Start difference. First operand has 323 places, 541 transitions, 9213 flow. Second operand 32 states and 2405 transitions. [2023-11-06 22:19:28,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 733 transitions, 11564 flow [2023-11-06 22:19:29,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 733 transitions, 10246 flow, removed 629 selfloop flow, removed 32 redundant places. [2023-11-06 22:19:29,526 INFO L231 Difference]: Finished difference. Result has 292 places, 277 transitions, 4865 flow [2023-11-06 22:19:29,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=7504, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4865, PETRI_PLACES=292, PETRI_TRANSITIONS=277} [2023-11-06 22:19:29,527 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 273 predicate places. [2023-11-06 22:19:29,527 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 277 transitions, 4865 flow [2023-11-06 22:19:29,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 69.52631578947368) internal successors, (2642), 38 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:29,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:29,529 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:29,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:29,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:19:29,735 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:29,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:29,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1827582944, now seen corresponding path program 16 times [2023-11-06 22:19:29,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:29,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89461622] [2023-11-06 22:19:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:29,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:31,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89461622] [2023-11-06 22:19:31,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89461622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273138218] [2023-11-06 22:19:31,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:19:31,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:31,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:31,319 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:31,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:19:31,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:19:31,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:31,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:19:31,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:32,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:32,095 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:19:32,096 INFO L351 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 25 treesize of output 13 [2023-11-06 22:19:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:19:32,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273138218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:32,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:32,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 26 [2023-11-06 22:19:32,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971542787] [2023-11-06 22:19:32,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:32,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:19:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:19:32,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:19:34,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 241 [2023-11-06 22:19:34,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 277 transitions, 4865 flow. Second operand has 28 states, 28 states have (on average 90.67857142857143) internal successors, (2539), 28 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:34,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:34,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 241 [2023-11-06 22:19:34,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:40,900 INFO L124 PetriNetUnfolderBase]: 5369/9853 cut-off events. [2023-11-06 22:19:40,900 INFO L125 PetriNetUnfolderBase]: For 65883/65883 co-relation queries the response was YES. [2023-11-06 22:19:40,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43037 conditions, 9853 events. 5369/9853 cut-off events. For 65883/65883 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 77991 event pairs, 311 based on Foata normal form. 16/9869 useless extension candidates. Maximal degree in co-relation 42938. Up to 2016 conditions per place. [2023-11-06 22:19:40,975 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 282 selfloop transitions, 409 changer transitions 251/942 dead transitions. [2023-11-06 22:19:40,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 942 transitions, 10915 flow [2023-11-06 22:19:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-06 22:19:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-11-06 22:19:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 7575 transitions. [2023-11-06 22:19:40,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029684008937121 [2023-11-06 22:19:40,990 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 7575 transitions. [2023-11-06 22:19:40,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 7575 transitions. [2023-11-06 22:19:40,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:40,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 7575 transitions. [2023-11-06 22:19:41,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 97.11538461538461) internal successors, (7575), 78 states have internal predecessors, (7575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 241.0) internal successors, (19039), 79 states have internal predecessors, (19039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,028 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 241.0) internal successors, (19039), 79 states have internal predecessors, (19039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,029 INFO L175 Difference]: Start difference. First operand has 292 places, 277 transitions, 4865 flow. Second operand 78 states and 7575 transitions. [2023-11-06 22:19:41,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 942 transitions, 10915 flow [2023-11-06 22:19:41,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 942 transitions, 10474 flow, removed 80 selfloop flow, removed 35 redundant places. [2023-11-06 22:19:41,711 INFO L231 Difference]: Finished difference. Result has 219 places, 442 transitions, 8376 flow [2023-11-06 22:19:41,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=8376, PETRI_PLACES=219, PETRI_TRANSITIONS=442} [2023-11-06 22:19:41,712 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 200 predicate places. [2023-11-06 22:19:41,712 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 442 transitions, 8376 flow [2023-11-06 22:19:41,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.67857142857143) internal successors, (2539), 28 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:41,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:41,713 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:41,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:41,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:41,914 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:41,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:41,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1697608762, now seen corresponding path program 17 times [2023-11-06 22:19:41,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:41,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489636465] [2023-11-06 22:19:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:41,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:44,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:44,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489636465] [2023-11-06 22:19:44,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489636465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:44,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321805518] [2023-11-06 22:19:44,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:19:44,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:44,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:44,189 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:44,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:19:44,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 22:19:44,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:44,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:19:44,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:44,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 22:19:44,865 INFO L351 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 21 treesize of output 16 [2023-11-06 22:19:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:19:45,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:45,236 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:45,236 INFO L351 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 30 treesize of output 23 [2023-11-06 22:19:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:19:45,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321805518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:45,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:45,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 28 [2023-11-06 22:19:45,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762484726] [2023-11-06 22:19:45,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:45,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:19:45,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:19:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:19:49,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 241 [2023-11-06 22:19:49,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 442 transitions, 8376 flow. Second operand has 30 states, 30 states have (on average 86.5) internal successors, (2595), 30 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:49,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:49,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 241 [2023-11-06 22:19:49,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:55,302 INFO L124 PetriNetUnfolderBase]: 6009/11013 cut-off events. [2023-11-06 22:19:55,303 INFO L125 PetriNetUnfolderBase]: For 83188/83188 co-relation queries the response was YES. [2023-11-06 22:19:55,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51219 conditions, 11013 events. 6009/11013 cut-off events. For 83188/83188 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 88674 event pairs, 443 based on Foata normal form. 1/11014 useless extension candidates. Maximal degree in co-relation 49968. Up to 2263 conditions per place. [2023-11-06 22:19:55,389 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 122 selfloop transitions, 465 changer transitions 75/662 dead transitions. [2023-11-06 22:19:55,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 662 transitions, 11245 flow [2023-11-06 22:19:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:19:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 22:19:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2758 transitions. [2023-11-06 22:19:55,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38146611341632086 [2023-11-06 22:19:55,395 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2758 transitions. [2023-11-06 22:19:55,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2758 transitions. [2023-11-06 22:19:55,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:55,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2758 transitions. [2023-11-06 22:19:55,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 91.93333333333334) internal successors, (2758), 30 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:55,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 241.0) internal successors, (7471), 31 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:55,410 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 241.0) internal successors, (7471), 31 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:55,411 INFO L175 Difference]: Start difference. First operand has 219 places, 442 transitions, 8376 flow. Second operand 30 states and 2758 transitions. [2023-11-06 22:19:55,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 662 transitions, 11245 flow [2023-11-06 22:19:55,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 662 transitions, 10084 flow, removed 191 selfloop flow, removed 19 redundant places. [2023-11-06 22:19:55,988 INFO L231 Difference]: Finished difference. Result has 230 places, 499 transitions, 9136 flow [2023-11-06 22:19:55,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=7365, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9136, PETRI_PLACES=230, PETRI_TRANSITIONS=499} [2023-11-06 22:19:55,990 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 211 predicate places. [2023-11-06 22:19:55,990 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 499 transitions, 9136 flow [2023-11-06 22:19:55,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.5) internal successors, (2595), 30 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:55,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:55,991 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:55,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:56,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:56,191 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:56,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1398423558, now seen corresponding path program 18 times [2023-11-06 22:19:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:56,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795313985] [2023-11-06 22:19:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:56,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:19:56,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:56,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795313985] [2023-11-06 22:19:56,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795313985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:56,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129583008] [2023-11-06 22:19:56,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:19:56,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:56,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:56,403 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:56,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:19:56,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:19:56,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:56,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:19:56,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:57,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:57,720 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:19:57,720 INFO L351 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 24 treesize of output 11 [2023-11-06 22:19:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:19:57,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129583008] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:57,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:57,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13] total 31 [2023-11-06 22:19:57,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886523376] [2023-11-06 22:19:57,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:57,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:19:57,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:57,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:19:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:19:58,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 241 [2023-11-06 22:19:58,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 499 transitions, 9136 flow. Second operand has 32 states, 32 states have (on average 89.9375) internal successors, (2878), 32 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:58,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:58,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 241 [2023-11-06 22:19:58,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:16,057 INFO L124 PetriNetUnfolderBase]: 14569/26963 cut-off events. [2023-11-06 22:20:16,057 INFO L125 PetriNetUnfolderBase]: For 189967/189967 co-relation queries the response was YES. [2023-11-06 22:20:16,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119436 conditions, 26963 events. 14569/26963 cut-off events. For 189967/189967 co-relation queries the response was YES. Maximal size of possible extension queue 1596. Compared 249542 event pairs, 1185 based on Foata normal form. 440/27403 useless extension candidates. Maximal degree in co-relation 117979. Up to 6480 conditions per place. [2023-11-06 22:20:16,249 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 94 selfloop transitions, 44 changer transitions 1760/1898 dead transitions. [2023-11-06 22:20:16,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1898 transitions, 27193 flow [2023-11-06 22:20:16,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-11-06 22:20:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2023-11-06 22:20:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 11651 transitions. [2023-11-06 22:20:16,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995404821508179 [2023-11-06 22:20:16,269 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 11651 transitions. [2023-11-06 22:20:16,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 11651 transitions. [2023-11-06 22:20:16,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:16,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 11651 transitions. [2023-11-06 22:20:16,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 96.2892561983471) internal successors, (11651), 121 states have internal predecessors, (11651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:16,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 241.0) internal successors, (29402), 122 states have internal predecessors, (29402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:16,332 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 241.0) internal successors, (29402), 122 states have internal predecessors, (29402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:16,332 INFO L175 Difference]: Start difference. First operand has 230 places, 499 transitions, 9136 flow. Second operand 121 states and 11651 transitions. [2023-11-06 22:20:16,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1898 transitions, 27193 flow [2023-11-06 22:20:18,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1898 transitions, 26817 flow, removed 143 selfloop flow, removed 13 redundant places. [2023-11-06 22:20:18,777 INFO L231 Difference]: Finished difference. Result has 412 places, 75 transitions, 1359 flow [2023-11-06 22:20:18,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=9042, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=1359, PETRI_PLACES=412, PETRI_TRANSITIONS=75} [2023-11-06 22:20:18,778 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 393 predicate places. [2023-11-06 22:20:18,778 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 75 transitions, 1359 flow [2023-11-06 22:20:18,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.9375) internal successors, (2878), 32 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:18,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:18,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:18,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-06 22:20:18,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:20:18,987 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:18,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:18,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1340148694, now seen corresponding path program 19 times [2023-11-06 22:20:18,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:18,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166339979] [2023-11-06 22:20:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:18,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:20,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:20,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166339979] [2023-11-06 22:20:20,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166339979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:20,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905526750] [2023-11-06 22:20:20,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:20:20,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:20,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:20,325 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:20,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:20:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:20,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-06 22:20:20,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:20,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 22:20:21,344 INFO L351 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 20 treesize of output 15 [2023-11-06 22:20:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:21,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:22,282 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:20:22,283 INFO L351 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 44 treesize of output 37 [2023-11-06 22:20:22,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-11-06 22:20:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:23,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905526750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:23,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:23,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-11-06 22:20:23,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088670128] [2023-11-06 22:20:23,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-06 22:20:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-06 22:20:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2525, Unknown=0, NotChecked=0, Total=2862 [2023-11-06 22:20:27,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 241 [2023-11-06 22:20:27,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 75 transitions, 1359 flow. Second operand has 54 states, 54 states have (on average 75.38888888888889) internal successors, (4071), 54 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:27,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:27,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 241 [2023-11-06 22:20:27,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:34,832 INFO L124 PetriNetUnfolderBase]: 1858/3714 cut-off events. [2023-11-06 22:20:34,832 INFO L125 PetriNetUnfolderBase]: For 627271/627271 co-relation queries the response was YES. [2023-11-06 22:20:34,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41825 conditions, 3714 events. 1858/3714 cut-off events. For 627271/627271 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 24723 event pairs, 70 based on Foata normal form. 92/3806 useless extension candidates. Maximal degree in co-relation 41691. Up to 1040 conditions per place. [2023-11-06 22:20:35,097 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 272 selfloop transitions, 150 changer transitions 53/475 dead transitions. [2023-11-06 22:20:35,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 475 transitions, 10333 flow [2023-11-06 22:20:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-06 22:20:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-06 22:20:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5068 transitions. [2023-11-06 22:20:35,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3337943752881512 [2023-11-06 22:20:35,114 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5068 transitions. [2023-11-06 22:20:35,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5068 transitions. [2023-11-06 22:20:35,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:35,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5068 transitions. [2023-11-06 22:20:35,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 80.44444444444444) internal successors, (5068), 63 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:35,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 241.0) internal successors, (15424), 64 states have internal predecessors, (15424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:35,146 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 241.0) internal successors, (15424), 64 states have internal predecessors, (15424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:35,146 INFO L175 Difference]: Start difference. First operand has 412 places, 75 transitions, 1359 flow. Second operand 63 states and 5068 transitions. [2023-11-06 22:20:35,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 475 transitions, 10333 flow [2023-11-06 22:20:35,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 475 transitions, 4425 flow, removed 2703 selfloop flow, removed 146 redundant places. [2023-11-06 22:20:35,934 INFO L231 Difference]: Finished difference. Result has 167 places, 187 transitions, 2856 flow [2023-11-06 22:20:35,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=2856, PETRI_PLACES=167, PETRI_TRANSITIONS=187} [2023-11-06 22:20:35,935 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 148 predicate places. [2023-11-06 22:20:35,935 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 187 transitions, 2856 flow [2023-11-06 22:20:35,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 75.38888888888889) internal successors, (4071), 54 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:35,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:35,936 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:35,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:36,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:20:36,137 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:36,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:36,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1405149882, now seen corresponding path program 20 times [2023-11-06 22:20:36,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:36,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947264861] [2023-11-06 22:20:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:36,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:20:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:36,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947264861] [2023-11-06 22:20:36,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947264861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:36,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188802738] [2023-11-06 22:20:36,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:20:36,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:36,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:36,409 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:36,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:20:36,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:20:36,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:36,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:20:36,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:20:36,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:20:37,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188802738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:37,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:37,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2023-11-06 22:20:37,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984703352] [2023-11-06 22:20:37,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:37,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:20:37,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:37,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:20:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:20:37,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 241 [2023-11-06 22:20:37,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 187 transitions, 2856 flow. Second operand has 32 states, 32 states have (on average 96.8125) internal successors, (3098), 32 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:37,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:37,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 241 [2023-11-06 22:20:37,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:38,964 INFO L124 PetriNetUnfolderBase]: 1217/2367 cut-off events. [2023-11-06 22:20:38,964 INFO L125 PetriNetUnfolderBase]: For 14590/14590 co-relation queries the response was YES. [2023-11-06 22:20:38,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10236 conditions, 2367 events. 1217/2367 cut-off events. For 14590/14590 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 14051 event pairs, 302 based on Foata normal form. 70/2437 useless extension candidates. Maximal degree in co-relation 10188. Up to 649 conditions per place. [2023-11-06 22:20:38,980 INFO L140 encePairwiseOnDemand]: 236/241 looper letters, 92 selfloop transitions, 92 changer transitions 121/305 dead transitions. [2023-11-06 22:20:38,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 305 transitions, 3391 flow [2023-11-06 22:20:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:20:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:20:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3237 transitions. [2023-11-06 22:20:38,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41973547717842324 [2023-11-06 22:20:38,988 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3237 transitions. [2023-11-06 22:20:38,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3237 transitions. [2023-11-06 22:20:38,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:38,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3237 transitions. [2023-11-06 22:20:38,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 101.15625) internal successors, (3237), 32 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:39,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 241.0) internal successors, (7953), 33 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:39,005 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 241.0) internal successors, (7953), 33 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:39,005 INFO L175 Difference]: Start difference. First operand has 167 places, 187 transitions, 2856 flow. Second operand 32 states and 3237 transitions. [2023-11-06 22:20:39,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 305 transitions, 3391 flow [2023-11-06 22:20:39,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 305 transitions, 2562 flow, removed 357 selfloop flow, removed 27 redundant places. [2023-11-06 22:20:39,062 INFO L231 Difference]: Finished difference. Result has 151 places, 138 transitions, 1510 flow [2023-11-06 22:20:39,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1510, PETRI_PLACES=151, PETRI_TRANSITIONS=138} [2023-11-06 22:20:39,063 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 132 predicate places. [2023-11-06 22:20:39,064 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 138 transitions, 1510 flow [2023-11-06 22:20:39,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 96.8125) internal successors, (3098), 32 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:39,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:39,065 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:39,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:39,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:39,272 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:39,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1911016093, now seen corresponding path program 21 times [2023-11-06 22:20:39,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:39,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837504663] [2023-11-06 22:20:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:39,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:40,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:40,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837504663] [2023-11-06 22:20:40,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837504663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:40,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214915672] [2023-11-06 22:20:40,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:20:40,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:40,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:40,745 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:40,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:20:41,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:20:41,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:41,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:20:41,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:20:41,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:42,442 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:20:42,442 INFO L351 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 24 treesize of output 11 [2023-11-06 22:20:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:20:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214915672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:43,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:43,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 47 [2023-11-06 22:20:43,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966730741] [2023-11-06 22:20:43,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:43,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 22:20:43,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 22:20:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:20:45,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 241 [2023-11-06 22:20:45,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 138 transitions, 1510 flow. Second operand has 49 states, 49 states have (on average 88.34693877551021) internal successors, (4329), 49 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:45,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:45,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 241 [2023-11-06 22:20:45,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:54,048 INFO L124 PetriNetUnfolderBase]: 1732/3418 cut-off events. [2023-11-06 22:20:54,048 INFO L125 PetriNetUnfolderBase]: For 10585/10585 co-relation queries the response was YES. [2023-11-06 22:20:54,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13269 conditions, 3418 events. 1732/3418 cut-off events. For 10585/10585 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 22968 event pairs, 284 based on Foata normal form. 198/3616 useless extension candidates. Maximal degree in co-relation 13225. Up to 1482 conditions per place. [2023-11-06 22:20:54,068 INFO L140 encePairwiseOnDemand]: 234/241 looper letters, 242 selfloop transitions, 74 changer transitions 136/452 dead transitions. [2023-11-06 22:20:54,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 452 transitions, 4240 flow [2023-11-06 22:20:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-06 22:20:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-06 22:20:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4955 transitions. [2023-11-06 22:20:54,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38792765990761763 [2023-11-06 22:20:54,076 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4955 transitions. [2023-11-06 22:20:54,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4955 transitions. [2023-11-06 22:20:54,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:54,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4955 transitions. [2023-11-06 22:20:54,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 93.49056603773585) internal successors, (4955), 53 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:54,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 241.0) internal successors, (13014), 54 states have internal predecessors, (13014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:54,104 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 241.0) internal successors, (13014), 54 states have internal predecessors, (13014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:54,104 INFO L175 Difference]: Start difference. First operand has 151 places, 138 transitions, 1510 flow. Second operand 53 states and 4955 transitions. [2023-11-06 22:20:54,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 452 transitions, 4240 flow [2023-11-06 22:20:54,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 452 transitions, 3856 flow, removed 164 selfloop flow, removed 16 redundant places. [2023-11-06 22:20:54,177 INFO L231 Difference]: Finished difference. Result has 186 places, 190 transitions, 2374 flow [2023-11-06 22:20:54,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=2374, PETRI_PLACES=186, PETRI_TRANSITIONS=190} [2023-11-06 22:20:54,178 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 167 predicate places. [2023-11-06 22:20:54,179 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 190 transitions, 2374 flow [2023-11-06 22:20:54,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 88.34693877551021) internal successors, (4329), 49 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:54,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:54,180 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:54,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:54,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:54,388 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:54,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:54,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1809415419, now seen corresponding path program 22 times [2023-11-06 22:20:54,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:54,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786415308] [2023-11-06 22:20:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:54,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:55,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:55,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786415308] [2023-11-06 22:20:55,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786415308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:55,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626800861] [2023-11-06 22:20:55,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:20:55,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:55,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:55,750 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:55,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12f7bd18-6c6e-42bd-8213-245595ceeaaf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:20:55,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:20:55,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:55,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:20:55,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:57,118 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:20:57,118 INFO L351 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 23 treesize of output 10 [2023-11-06 22:20:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:57,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:57,560 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:20:57,560 INFO L351 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 25 treesize of output 13 [2023-11-06 22:20:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:20:59,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626800861] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:59,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:59,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-11-06 22:20:59,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673434094] [2023-11-06 22:20:59,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:59,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-06 22:20:59,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:59,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-06 22:20:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=3082, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 22:21:02,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 241 [2023-11-06 22:21:02,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 190 transitions, 2374 flow. Second operand has 60 states, 60 states have (on average 88.4) internal successors, (5304), 60 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:02,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:02,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 241 [2023-11-06 22:21:02,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand