./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.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_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/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_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/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_74239178-3fb4-4a67-be57-83f6b4cdeb07/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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:08:12,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:08:12,638 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:08:12,644 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:08:12,645 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:08:12,672 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:08:12,672 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:08:12,673 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:08:12,674 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:08:12,674 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:08:12,675 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:08:12,676 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:08:12,676 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:08:12,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:08:12,677 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:08:12,678 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:08:12,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:08:12,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:08:12,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:08:12,680 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:08:12,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:08:12,681 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:08:12,681 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:08:12,682 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:08:12,682 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:08:12,683 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:08:12,683 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:08:12,683 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:08:12,684 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:12,684 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:08:12,684 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:08:12,685 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:08:12,685 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:08:12,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:08:12,686 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:08:12,686 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:08:12,686 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:08:12,687 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:08:12,687 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:08:12,687 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_74239178-3fb4-4a67-be57-83f6b4cdeb07/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2023-11-06 23:08:12,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:08:13,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:08:13,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:08:13,026 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:08:13,026 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:08:13,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-06 23:08:16,117 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:08:16,389 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:08:16,390 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-06 23:08:16,399 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/data/c7a6f1fd7/e9df4cce659f433abc5a9d6765fc9393/FLAGd58dc514c [2023-11-06 23:08:16,422 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/data/c7a6f1fd7/e9df4cce659f433abc5a9d6765fc9393 [2023-11-06 23:08:16,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:08:16,434 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:08:16,436 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:16,436 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:08:16,441 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:08:16,442 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,443 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29fc9984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16, skipping insertion in model container [2023-11-06 23:08:16,443 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,467 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:08:16,635 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_74239178-3fb4-4a67-be57-83f6b4cdeb07/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2023-11-06 23:08:16,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:16,654 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:08:16,673 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_74239178-3fb4-4a67-be57-83f6b4cdeb07/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2023-11-06 23:08:16,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:16,692 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:08:16,693 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:08:16,701 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:08:16,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16 WrapperNode [2023-11-06 23:08:16,703 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:16,704 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:16,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:08:16,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:08:16,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,760 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 135 [2023-11-06 23:08:16,761 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:16,762 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:08:16,762 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:08:16,762 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:08:16,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,775 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,775 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,783 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,787 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,789 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,790 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:08:16,794 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:08:16,794 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:08:16,794 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:08:16,795 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (1/1) ... [2023-11-06 23:08:16,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:16,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:08:16,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:08:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:08:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:08:16,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:08:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:08:16,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:08:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:08:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:08:16,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:08:16,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:08:16,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:08:16,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:08:16,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:08:16,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:08:16,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:08:16,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:08:16,893 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 23:08:17,026 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:08:17,028 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:08:17,294 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:08:17,409 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:08:17,409 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:08:17,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:17 BoogieIcfgContainer [2023-11-06 23:08:17,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:08:17,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:08:17,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:08:17,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:08:17,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:08:16" (1/3) ... [2023-11-06 23:08:17,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d57948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:17, skipping insertion in model container [2023-11-06 23:08:17,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:16" (2/3) ... [2023-11-06 23:08:17,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d57948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:17, skipping insertion in model container [2023-11-06 23:08:17,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:17" (3/3) ... [2023-11-06 23:08:17,422 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-11-06 23:08:17,431 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:08:17,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:08:17,443 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:08:17,444 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:08:17,547 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:08:17,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 248 flow [2023-11-06 23:08:17,698 INFO L124 PetriNetUnfolderBase]: 9/115 cut-off events. [2023-11-06 23:08:17,699 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:08:17,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-11-06 23:08:17,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 117 transitions, 248 flow [2023-11-06 23:08:17,710 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 224 flow [2023-11-06 23:08:17,714 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:08:17,724 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 106 transitions, 224 flow [2023-11-06 23:08:17,727 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 106 transitions, 224 flow [2023-11-06 23:08:17,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 224 flow [2023-11-06 23:08:17,767 INFO L124 PetriNetUnfolderBase]: 9/106 cut-off events. [2023-11-06 23:08:17,767 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:08:17,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 106 events. 9/106 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. 0/97 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-11-06 23:08:17,770 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-11-06 23:08:22,166 INFO L134 LiptonReduction]: Checked pairs total: 521 [2023-11-06 23:08:22,166 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-11-06 23:08:22,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:08:22,203 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;@4de7e1d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:08:22,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 23:08:22,213 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:08:22,213 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-11-06 23:08:22,213 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:08:22,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:22,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:22,215 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 23:08:22,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:22,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1318117644, now seen corresponding path program 1 times [2023-11-06 23:08:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:22,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967527638] [2023-11-06 23:08:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:22,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:22,527 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 23:08:22,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:22,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967527638] [2023-11-06 23:08:22,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967527638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:22,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:22,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:08:22,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415663963] [2023-11-06 23:08:22,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:22,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:22,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:22,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:22,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:22,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 225 [2023-11-06 23:08:22,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 23:08:22,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:22,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 225 [2023-11-06 23:08:22,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:22,668 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2023-11-06 23:08:22,668 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 23:08:22,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 132 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 23:08:22,670 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2023-11-06 23:08:22,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2023-11-06 23:08:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 330 transitions. [2023-11-06 23:08:22,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-11-06 23:08:22,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 330 transitions. [2023-11-06 23:08:22,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 330 transitions. [2023-11-06 23:08:22,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:22,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 330 transitions. [2023-11-06 23:08:22,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 23:08:22,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 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 23:08:22,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 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 23:08:22,706 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 330 transitions. [2023-11-06 23:08:22,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2023-11-06 23:08:22,709 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 23:08:22,711 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2023-11-06 23:08:22,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, 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 23:08:22,716 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-11-06 23:08:22,717 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2023-11-06 23:08:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 23:08:22,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:22,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:22,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:08:22,718 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 23:08:22,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1012700992, now seen corresponding path program 1 times [2023-11-06 23:08:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:22,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575680114] [2023-11-06 23:08:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:22,918 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 23:08:22,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575680114] [2023-11-06 23:08:22,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575680114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:22,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:22,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:22,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682568241] [2023-11-06 23:08:22,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:22,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:22,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:22,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:22,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 225 [2023-11-06 23:08:22,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 23:08:22,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:22,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 225 [2023-11-06 23:08:22,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:23,009 INFO L124 PetriNetUnfolderBase]: 52/102 cut-off events. [2023-11-06 23:08:23,010 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 23:08:23,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 254 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 23:08:23,012 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-11-06 23:08:23,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2023-11-06 23:08:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-11-06 23:08:23,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948148148148148 [2023-11-06 23:08:23,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-11-06 23:08:23,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-11-06 23:08:23,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:23,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-11-06 23:08:23,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 23:08:23,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 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 23:08:23,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 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 23:08:23,031 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 334 transitions. [2023-11-06 23:08:23,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2023-11-06 23:08:23,033 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 23:08:23,034 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2023-11-06 23:08:23,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, 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 23:08:23,035 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-11-06 23:08:23,041 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2023-11-06 23:08:23,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 23:08:23,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:23,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:23,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:08:23,042 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 23:08:23,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:23,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1194843734, now seen corresponding path program 1 times [2023-11-06 23:08:23,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:23,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184584409] [2023-11-06 23:08:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:23,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:23,309 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 23:08:23,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:23,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184584409] [2023-11-06 23:08:23,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184584409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:23,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:23,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:08:23,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526024048] [2023-11-06 23:08:23,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:23,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:23,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:23,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:23,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 225 [2023-11-06 23:08:23,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 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 23:08:23,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:23,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 225 [2023-11-06 23:08:23,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:23,471 INFO L124 PetriNetUnfolderBase]: 61/130 cut-off events. [2023-11-06 23:08:23,472 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-06 23:08:23,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 352 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 23:08:23,474 INFO L140 encePairwiseOnDemand]: 221/225 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-11-06 23:08:23,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2023-11-06 23:08:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:08:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2023-11-06 23:08:23,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2023-11-06 23:08:23,478 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2023-11-06 23:08:23,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2023-11-06 23:08:23,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:23,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2023-11-06 23:08:23,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 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 23:08:23,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 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 23:08:23,484 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 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 23:08:23,484 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 411 transitions. [2023-11-06 23:08:23,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2023-11-06 23:08:23,486 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 23:08:23,487 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2023-11-06 23:08:23,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, 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 23:08:23,489 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-11-06 23:08:23,493 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2023-11-06 23:08:23,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 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 23:08:23,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:23,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:23,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:08:23,496 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 23:08:23,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1994523602, now seen corresponding path program 1 times [2023-11-06 23:08:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915236334] [2023-11-06 23:08:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:23,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:24,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:24,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915236334] [2023-11-06 23:08:24,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915236334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:24,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746120591] [2023-11-06 23:08:24,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:24,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:24,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:24,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:24,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:08:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:24,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 23:08:24,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:24,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:24,292 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 23:08:24,335 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 23:08:24,388 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 23:08:24,438 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 16 treesize of output 11 [2023-11-06 23:08:24,528 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 23:08:24,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:24,749 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:24,750 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 23:08:24,760 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:24,761 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 106 treesize of output 95 [2023-11-06 23:08:24,787 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:24,788 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 60 treesize of output 53 [2023-11-06 23:08:24,809 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 23:08:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:24,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746120591] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:24,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:24,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-11-06 23:08:24,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843466978] [2023-11-06 23:08:24,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:24,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:08:24,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:24,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:08:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=135, Unknown=4, NotChecked=0, Total=182 [2023-11-06 23:08:25,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 225 [2023-11-06 23:08:25,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 14 states, 14 states have (on average 76.28571428571429) internal successors, (1068), 14 states have internal predecessors, (1068), 0 states have call successors, (0), 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 23:08:25,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:25,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 225 [2023-11-06 23:08:25,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:25,548 INFO L124 PetriNetUnfolderBase]: 68/132 cut-off events. [2023-11-06 23:08:25,548 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-11-06 23:08:25,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 132 events. 68/132 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 9 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 318. Up to 37 conditions per place. [2023-11-06 23:08:25,553 INFO L140 encePairwiseOnDemand]: 219/225 looper letters, 26 selfloop transitions, 6 changer transitions 9/41 dead transitions. [2023-11-06 23:08:25,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 209 flow [2023-11-06 23:08:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:08:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:08:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 560 transitions. [2023-11-06 23:08:25,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2023-11-06 23:08:25,556 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 560 transitions. [2023-11-06 23:08:25,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 560 transitions. [2023-11-06 23:08:25,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:25,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 560 transitions. [2023-11-06 23:08:25,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 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 23:08:25,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 225.0) internal successors, (1800), 8 states have internal predecessors, (1800), 0 states have call successors, (0), 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 23:08:25,565 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 225.0) internal successors, (1800), 8 states have internal predecessors, (1800), 0 states have call successors, (0), 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 23:08:25,565 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 7 states and 560 transitions. [2023-11-06 23:08:25,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 209 flow [2023-11-06 23:08:25,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 41 transitions, 203 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:25,568 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 84 flow [2023-11-06 23:08:25,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-11-06 23:08:25,569 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 9 predicate places. [2023-11-06 23:08:25,569 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 84 flow [2023-11-06 23:08:25,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.28571428571429) internal successors, (1068), 14 states have internal predecessors, (1068), 0 states have call successors, (0), 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 23:08:25,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:25,571 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:25,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:25,777 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 23:08:25,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash -897601072, now seen corresponding path program 2 times [2023-11-06 23:08:25,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:25,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391978371] [2023-11-06 23:08:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:25,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:25,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391978371] [2023-11-06 23:08:25,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391978371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:25,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137813309] [2023-11-06 23:08:25,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:25,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:25,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:25,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:25,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:08:26,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:26,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:26,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:08:26,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:26,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:26,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137813309] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:26,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:26,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-11-06 23:08:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425107545] [2023-11-06 23:08:26,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:26,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:26,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:26,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 225 [2023-11-06 23:08:26,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 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 23:08:26,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:26,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 225 [2023-11-06 23:08:26,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:26,183 INFO L124 PetriNetUnfolderBase]: 140/275 cut-off events. [2023-11-06 23:08:26,183 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-11-06 23:08:26,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 275 events. 140/275 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1036 event pairs, 41 based on Foata normal form. 12/287 useless extension candidates. Maximal degree in co-relation 699. Up to 111 conditions per place. [2023-11-06 23:08:26,187 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 35 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2023-11-06 23:08:26,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 42 transitions, 248 flow [2023-11-06 23:08:26,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:08:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 449 transitions. [2023-11-06 23:08:26,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988888888888889 [2023-11-06 23:08:26,190 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 449 transitions. [2023-11-06 23:08:26,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 449 transitions. [2023-11-06 23:08:26,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:26,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 449 transitions. [2023-11-06 23:08:26,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 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 23:08:26,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 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 23:08:26,197 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 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 23:08:26,197 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 84 flow. Second operand 4 states and 449 transitions. [2023-11-06 23:08:26,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 42 transitions, 248 flow [2023-11-06 23:08:26,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 234 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-06 23:08:26,204 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 138 flow [2023-11-06 23:08:26,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-11-06 23:08:26,207 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 10 predicate places. [2023-11-06 23:08:26,209 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 138 flow [2023-11-06 23:08:26,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 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 23:08:26,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:26,210 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:26,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:26,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:26,416 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 23:08:26,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:26,417 INFO L85 PathProgramCache]: Analyzing trace with hash 854799280, now seen corresponding path program 3 times [2023-11-06 23:08:26,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:26,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755100564] [2023-11-06 23:08:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:26,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:26,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755100564] [2023-11-06 23:08:26,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755100564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:26,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862752393] [2023-11-06 23:08:26,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:26,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:26,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:26,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:26,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:08:26,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:08:26,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:26,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:08:26,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:26,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:27,102 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 23:08:27,103 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 27 treesize of output 13 [2023-11-06 23:08:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:27,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862752393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:27,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:27,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-11-06 23:08:27,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669669479] [2023-11-06 23:08:27,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:27,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:08:27,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:08:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:08:27,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 225 [2023-11-06 23:08:27,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 138 flow. Second operand has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 23:08:27,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:27,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 225 [2023-11-06 23:08:27,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:28,159 INFO L124 PetriNetUnfolderBase]: 194/406 cut-off events. [2023-11-06 23:08:28,159 INFO L125 PetriNetUnfolderBase]: For 558/558 co-relation queries the response was YES. [2023-11-06 23:08:28,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 406 events. 194/406 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1759 event pairs, 70 based on Foata normal form. 19/425 useless extension candidates. Maximal degree in co-relation 811. Up to 178 conditions per place. [2023-11-06 23:08:28,163 INFO L140 encePairwiseOnDemand]: 219/225 looper letters, 26 selfloop transitions, 5 changer transitions 42/73 dead transitions. [2023-11-06 23:08:28,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 73 transitions, 440 flow [2023-11-06 23:08:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:08:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:08:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 909 transitions. [2023-11-06 23:08:28,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404 [2023-11-06 23:08:28,168 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 909 transitions. [2023-11-06 23:08:28,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 909 transitions. [2023-11-06 23:08:28,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:28,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 909 transitions. [2023-11-06 23:08:28,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.9) internal successors, (909), 10 states have internal predecessors, (909), 0 states have call successors, (0), 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 23:08:28,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 225.0) internal successors, (2475), 11 states have internal predecessors, (2475), 0 states have call successors, (0), 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 23:08:28,178 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 225.0) internal successors, (2475), 11 states have internal predecessors, (2475), 0 states have call successors, (0), 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 23:08:28,178 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 138 flow. Second operand 10 states and 909 transitions. [2023-11-06 23:08:28,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 73 transitions, 440 flow [2023-11-06 23:08:28,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 73 transitions, 430 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-06 23:08:28,184 INFO L231 Difference]: Finished difference. Result has 44 places, 25 transitions, 166 flow [2023-11-06 23:08:28,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=166, PETRI_PLACES=44, PETRI_TRANSITIONS=25} [2023-11-06 23:08:28,187 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 25 predicate places. [2023-11-06 23:08:28,190 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 25 transitions, 166 flow [2023-11-06 23:08:28,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 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 23:08:28,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:28,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:28,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:28,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:28,397 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 23:08:28,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1582709182, now seen corresponding path program 4 times [2023-11-06 23:08:28,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:28,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460080009] [2023-11-06 23:08:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:28,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:28,864 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 23:08:28,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:28,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460080009] [2023-11-06 23:08:28,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460080009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:28,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748827600] [2023-11-06 23:08:28,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:08:28,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:28,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:28,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:28,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:08:28,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:08:28,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:28,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:08:28,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:29,102 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 23:08:29,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:29,160 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:08:29,161 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 28 treesize of output 11 [2023-11-06 23:08:29,201 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 23:08:29,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748827600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:29,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:29,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 14 [2023-11-06 23:08:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878128244] [2023-11-06 23:08:29,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:29,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:08:29,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:08:29,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:08:29,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 225 [2023-11-06 23:08:29,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 25 transitions, 166 flow. Second operand has 16 states, 16 states have (on average 94.6875) internal successors, (1515), 16 states have internal predecessors, (1515), 0 states have call successors, (0), 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 23:08:29,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:29,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 225 [2023-11-06 23:08:29,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:30,015 INFO L124 PetriNetUnfolderBase]: 332/628 cut-off events. [2023-11-06 23:08:30,015 INFO L125 PetriNetUnfolderBase]: For 928/928 co-relation queries the response was YES. [2023-11-06 23:08:30,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1988 conditions, 628 events. 332/628 cut-off events. For 928/928 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2978 event pairs, 21 based on Foata normal form. 5/633 useless extension candidates. Maximal degree in co-relation 1949. Up to 126 conditions per place. [2023-11-06 23:08:30,020 INFO L140 encePairwiseOnDemand]: 219/225 looper letters, 68 selfloop transitions, 26 changer transitions 51/145 dead transitions. [2023-11-06 23:08:30,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 145 transitions, 882 flow [2023-11-06 23:08:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:08:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:08:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1800 transitions. [2023-11-06 23:08:30,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-06 23:08:30,027 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1800 transitions. [2023-11-06 23:08:30,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1800 transitions. [2023-11-06 23:08:30,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:30,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1800 transitions. [2023-11-06 23:08:30,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 100.0) internal successors, (1800), 18 states have internal predecessors, (1800), 0 states have call successors, (0), 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 23:08:30,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 225.0) internal successors, (4275), 19 states have internal predecessors, (4275), 0 states have call successors, (0), 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 23:08:30,042 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 225.0) internal successors, (4275), 19 states have internal predecessors, (4275), 0 states have call successors, (0), 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 23:08:30,042 INFO L175 Difference]: Start difference. First operand has 44 places, 25 transitions, 166 flow. Second operand 18 states and 1800 transitions. [2023-11-06 23:08:30,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 145 transitions, 882 flow [2023-11-06 23:08:30,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 145 transitions, 846 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-11-06 23:08:30,049 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 373 flow [2023-11-06 23:08:30,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=373, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-11-06 23:08:30,050 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 35 predicate places. [2023-11-06 23:08:30,050 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 373 flow [2023-11-06 23:08:30,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 94.6875) internal successors, (1515), 16 states have internal predecessors, (1515), 0 states have call successors, (0), 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 23:08:30,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:30,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:30,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:30,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:30,257 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 23:08:30,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:30,258 INFO L85 PathProgramCache]: Analyzing trace with hash -155445002, now seen corresponding path program 5 times [2023-11-06 23:08:30,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:30,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259251323] [2023-11-06 23:08:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:30,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:30,794 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 23:08:30,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:30,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259251323] [2023-11-06 23:08:30,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259251323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:30,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144956566] [2023-11-06 23:08:30,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:08:30,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:30,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:30,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:30,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:08:30,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:30,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:08:30,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:31,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:31,203 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 22 treesize of output 17 [2023-11-06 23:08:31,345 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 23:08:31,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:31,493 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:31,493 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 47 treesize of output 35 [2023-11-06 23:08:31,505 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 23:08:31,666 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 23:08:31,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144956566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:31,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:31,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 19 [2023-11-06 23:08:31,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480320556] [2023-11-06 23:08:31,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:31,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:08:31,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:31,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:08:31,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:08:32,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 225 [2023-11-06 23:08:32,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 373 flow. Second operand has 21 states, 21 states have (on average 85.14285714285714) internal successors, (1788), 21 states have internal predecessors, (1788), 0 states have call successors, (0), 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 23:08:32,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:32,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 225 [2023-11-06 23:08:32,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:33,419 INFO L124 PetriNetUnfolderBase]: 348/657 cut-off events. [2023-11-06 23:08:33,419 INFO L125 PetriNetUnfolderBase]: For 1227/1227 co-relation queries the response was YES. [2023-11-06 23:08:33,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2212 conditions, 657 events. 348/657 cut-off events. For 1227/1227 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3120 event pairs, 27 based on Foata normal form. 1/658 useless extension candidates. Maximal degree in co-relation 2174. Up to 132 conditions per place. [2023-11-06 23:08:33,424 INFO L140 encePairwiseOnDemand]: 219/225 looper letters, 54 selfloop transitions, 29 changer transitions 42/125 dead transitions. [2023-11-06 23:08:33,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 125 transitions, 868 flow [2023-11-06 23:08:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:08:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:08:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1442 transitions. [2023-11-06 23:08:33,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40055555555555555 [2023-11-06 23:08:33,431 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1442 transitions. [2023-11-06 23:08:33,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1442 transitions. [2023-11-06 23:08:33,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:33,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1442 transitions. [2023-11-06 23:08:33,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 90.125) internal successors, (1442), 16 states have internal predecessors, (1442), 0 states have call successors, (0), 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 23:08:33,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 225.0) internal successors, (3825), 17 states have internal predecessors, (3825), 0 states have call successors, (0), 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 23:08:33,445 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 225.0) internal successors, (3825), 17 states have internal predecessors, (3825), 0 states have call successors, (0), 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 23:08:33,445 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 373 flow. Second operand 16 states and 1442 transitions. [2023-11-06 23:08:33,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 125 transitions, 868 flow [2023-11-06 23:08:33,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 125 transitions, 738 flow, removed 39 selfloop flow, removed 7 redundant places. [2023-11-06 23:08:33,456 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 346 flow [2023-11-06 23:08:33,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=346, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-11-06 23:08:33,457 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 44 predicate places. [2023-11-06 23:08:33,457 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 346 flow [2023-11-06 23:08:33,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.14285714285714) internal successors, (1788), 21 states have internal predecessors, (1788), 0 states have call successors, (0), 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 23:08:33,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:33,458 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:33,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:33,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:08:33,664 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 23:08:33,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:33,665 INFO L85 PathProgramCache]: Analyzing trace with hash 529280692, now seen corresponding path program 6 times [2023-11-06 23:08:33,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:33,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551039547] [2023-11-06 23:08:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:33,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:08:33,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:33,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551039547] [2023-11-06 23:08:33,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551039547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:33,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306667424] [2023-11-06 23:08:33,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:08:33,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:33,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:33,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:33,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:08:33,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:08:33,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:33,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:08:33,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:08:33,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:08:33,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306667424] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:33,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:33,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-11-06 23:08:33,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209632766] [2023-11-06 23:08:33,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:33,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:08:33,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:33,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:08:33,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:08:33,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 225 [2023-11-06 23:08:33,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 107.33333333333333) internal successors, (644), 6 states have internal predecessors, (644), 0 states have call successors, (0), 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 23:08:33,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:33,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 225 [2023-11-06 23:08:33,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:34,242 INFO L124 PetriNetUnfolderBase]: 706/1325 cut-off events. [2023-11-06 23:08:34,243 INFO L125 PetriNetUnfolderBase]: For 2504/2504 co-relation queries the response was YES. [2023-11-06 23:08:34,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4079 conditions, 1325 events. 706/1325 cut-off events. For 2504/2504 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7581 event pairs, 152 based on Foata normal form. 18/1343 useless extension candidates. Maximal degree in co-relation 4042. Up to 451 conditions per place. [2023-11-06 23:08:34,251 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 55 selfloop transitions, 38 changer transitions 0/93 dead transitions. [2023-11-06 23:08:34,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 864 flow [2023-11-06 23:08:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 563 transitions. [2023-11-06 23:08:34,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004444444444445 [2023-11-06 23:08:34,254 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 563 transitions. [2023-11-06 23:08:34,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 563 transitions. [2023-11-06 23:08:34,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:34,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 563 transitions. [2023-11-06 23:08:34,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 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 23:08:34,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 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 23:08:34,260 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 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 23:08:34,260 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 346 flow. Second operand 5 states and 563 transitions. [2023-11-06 23:08:34,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 864 flow [2023-11-06 23:08:34,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 93 transitions, 781 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-11-06 23:08:34,272 INFO L231 Difference]: Finished difference. Result has 60 places, 68 transitions, 609 flow [2023-11-06 23:08:34,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=609, PETRI_PLACES=60, PETRI_TRANSITIONS=68} [2023-11-06 23:08:34,273 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 41 predicate places. [2023-11-06 23:08:34,273 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 68 transitions, 609 flow [2023-11-06 23:08:34,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 107.33333333333333) internal successors, (644), 6 states have internal predecessors, (644), 0 states have call successors, (0), 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 23:08:34,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:34,274 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:34,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:34,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 23:08:34,480 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 23:08:34,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1322919798, now seen corresponding path program 7 times [2023-11-06 23:08:34,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:34,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724104446] [2023-11-06 23:08:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:34,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:08:34,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:34,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724104446] [2023-11-06 23:08:34,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724104446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:34,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502036115] [2023-11-06 23:08:34,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:08:34,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:34,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:34,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:08:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:34,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:08:34,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:08:35,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:08:35,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502036115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:35,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:35,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 23:08:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546236116] [2023-11-06 23:08:35,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:35,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:08:35,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:08:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:08:35,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 225 [2023-11-06 23:08:35,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 68 transitions, 609 flow. Second operand has 20 states, 20 states have (on average 94.15) internal successors, (1883), 20 states have internal predecessors, (1883), 0 states have call successors, (0), 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 23:08:35,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:35,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 225 [2023-11-06 23:08:35,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:35,896 INFO L124 PetriNetUnfolderBase]: 1185/2287 cut-off events. [2023-11-06 23:08:35,896 INFO L125 PetriNetUnfolderBase]: For 4030/4030 co-relation queries the response was YES. [2023-11-06 23:08:35,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7441 conditions, 2287 events. 1185/2287 cut-off events. For 4030/4030 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15052 event pairs, 654 based on Foata normal form. 72/2359 useless extension candidates. Maximal degree in co-relation 6662. Up to 1324 conditions per place. [2023-11-06 23:08:35,911 INFO L140 encePairwiseOnDemand]: 220/225 looper letters, 65 selfloop transitions, 4 changer transitions 59/128 dead transitions. [2023-11-06 23:08:35,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 128 transitions, 1304 flow [2023-11-06 23:08:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:08:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:08:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 782 transitions. [2023-11-06 23:08:35,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43444444444444447 [2023-11-06 23:08:35,915 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 782 transitions. [2023-11-06 23:08:35,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 782 transitions. [2023-11-06 23:08:35,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:35,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 782 transitions. [2023-11-06 23:08:35,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.75) internal successors, (782), 8 states have internal predecessors, (782), 0 states have call successors, (0), 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 23:08:35,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 225.0) internal successors, (2025), 9 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:35,923 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 225.0) internal successors, (2025), 9 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:08:35,923 INFO L175 Difference]: Start difference. First operand has 60 places, 68 transitions, 609 flow. Second operand 8 states and 782 transitions. [2023-11-06 23:08:35,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 128 transitions, 1304 flow [2023-11-06 23:08:35,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 128 transitions, 1270 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-11-06 23:08:35,950 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 681 flow [2023-11-06 23:08:35,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=681, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-11-06 23:08:35,951 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 52 predicate places. [2023-11-06 23:08:35,951 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 681 flow [2023-11-06 23:08:35,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 94.15) internal successors, (1883), 20 states have internal predecessors, (1883), 0 states have call successors, (0), 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 23:08:35,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:35,953 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:35,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:36,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:36,159 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 23:08:36,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:36,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1194589422, now seen corresponding path program 8 times [2023-11-06 23:08:36,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:36,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386300517] [2023-11-06 23:08:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:36,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:36,786 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 23:08:36,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:36,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386300517] [2023-11-06 23:08:36,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386300517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:36,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079342135] [2023-11-06 23:08:36,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:36,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:36,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:36,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:36,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:08:36,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:36,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:36,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:08:36,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:37,119 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 23:08:37,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:37,218 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:08:37,218 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 28 treesize of output 11 [2023-11-06 23:08:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:08:37,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079342135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:37,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:37,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 23 [2023-11-06 23:08:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329019212] [2023-11-06 23:08:37,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:37,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:08:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:08:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:08:37,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 225 [2023-11-06 23:08:37,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 681 flow. Second operand has 25 states, 25 states have (on average 91.12) internal successors, (2278), 25 states have internal predecessors, (2278), 0 states have call successors, (0), 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 23:08:37,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:37,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 225 [2023-11-06 23:08:37,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:40,117 INFO L124 PetriNetUnfolderBase]: 1108/2052 cut-off events. [2023-11-06 23:08:40,117 INFO L125 PetriNetUnfolderBase]: For 4416/4416 co-relation queries the response was YES. [2023-11-06 23:08:40,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6980 conditions, 2052 events. 1108/2052 cut-off events. For 4416/4416 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12393 event pairs, 45 based on Foata normal form. 12/2064 useless extension candidates. Maximal degree in co-relation 6939. Up to 420 conditions per place. [2023-11-06 23:08:40,132 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 137 selfloop transitions, 92 changer transitions 128/357 dead transitions. [2023-11-06 23:08:40,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 357 transitions, 2470 flow [2023-11-06 23:08:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-06 23:08:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-06 23:08:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4162 transitions. [2023-11-06 23:08:40,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301808785529716 [2023-11-06 23:08:40,147 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4162 transitions. [2023-11-06 23:08:40,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4162 transitions. [2023-11-06 23:08:40,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:40,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4162 transitions. [2023-11-06 23:08:40,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 96.79069767441861) internal successors, (4162), 43 states have internal predecessors, (4162), 0 states have call successors, (0), 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 23:08:40,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 225.0) internal successors, (9900), 44 states have internal predecessors, (9900), 0 states have call successors, (0), 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 23:08:40,183 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 225.0) internal successors, (9900), 44 states have internal predecessors, (9900), 0 states have call successors, (0), 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 23:08:40,184 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 681 flow. Second operand 43 states and 4162 transitions. [2023-11-06 23:08:40,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 357 transitions, 2470 flow [2023-11-06 23:08:40,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 357 transitions, 2314 flow, removed 75 selfloop flow, removed 6 redundant places. [2023-11-06 23:08:40,222 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 1254 flow [2023-11-06 23:08:40,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1254, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2023-11-06 23:08:40,224 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 97 predicate places. [2023-11-06 23:08:40,224 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 1254 flow [2023-11-06 23:08:40,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 91.12) internal successors, (2278), 25 states have internal predecessors, (2278), 0 states have call successors, (0), 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 23:08:40,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:40,226 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:40,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:40,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:40,432 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 23:08:40,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:40,433 INFO L85 PathProgramCache]: Analyzing trace with hash -948859218, now seen corresponding path program 9 times [2023-11-06 23:08:40,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:40,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426601559] [2023-11-06 23:08:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:40,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:41,098 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 23:08:41,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:41,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426601559] [2023-11-06 23:08:41,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426601559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:41,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124082667] [2023-11-06 23:08:41,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:08:41,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:41,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:41,101 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:41,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:08:41,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:08:41,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:41,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 23:08:41,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:41,398 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 23:08:41,456 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 23:08:41,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:41,611 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 18 treesize of output 13 [2023-11-06 23:08:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:08:41,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:42,422 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:42,422 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 23:08:42,435 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:42,435 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 110 treesize of output 98 [2023-11-06 23:08:42,456 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:08:42,456 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 62 treesize of output 54 [2023-11-06 23:08:42,467 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 56 treesize of output 42 [2023-11-06 23:08:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:08:42,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124082667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:42,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:42,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-11-06 23:08:42,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880079368] [2023-11-06 23:08:42,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:42,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:08:42,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:08:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:08:44,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 225 [2023-11-06 23:08:44,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 1254 flow. Second operand has 32 states, 32 states have (on average 79.71875) internal successors, (2551), 32 states have internal predecessors, (2551), 0 states have call successors, (0), 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 23:08:44,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:44,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 225 [2023-11-06 23:08:44,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:46,228 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~front~0 4))) (let ((.cse2 (forall ((v_ArrVal_287 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_287) c_~queue~0.base) (+ c_~queue~0.offset .cse1 8))))) (.cse0 (select |c_#memory_int| c_~queue~0.base))) (and (or (= (select .cse0 (+ c_~queue~0.offset .cse1)) 5) (< c_~size~0 1)) (or .cse2 (< c_~size~0 3)) (or .cse2 (forall ((~size~0 Int)) (or (< (+ ~size~0 c_~front~0) 0) (not (= 5 (select .cse0 (+ (* ~size~0 4) c_~queue~0.offset .cse1)))) (< c_~n~0 (+ ~size~0 c_~front~0 1)) (< ~size~0 2)))) (or (= 5 (select .cse0 (+ c_~queue~0.offset .cse1 4))) (< c_~size~0 2)) (= 5 c_~x~0) (or (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse3 (< c_~n~0 1))) (and (or (< c_~n~0 (+ 3 c_~front~0)) .cse3 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< c_~n~0 (+ c_~front~0 4)) .cse3))))))) is different from false [2023-11-06 23:08:50,975 INFO L124 PetriNetUnfolderBase]: 4814/8956 cut-off events. [2023-11-06 23:08:50,976 INFO L125 PetriNetUnfolderBase]: For 24047/24047 co-relation queries the response was YES. [2023-11-06 23:08:51,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32064 conditions, 8956 events. 4814/8956 cut-off events. For 24047/24047 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 70073 event pairs, 662 based on Foata normal form. 10/8966 useless extension candidates. Maximal degree in co-relation 30705. Up to 1856 conditions per place. [2023-11-06 23:08:51,050 INFO L140 encePairwiseOnDemand]: 216/225 looper letters, 314 selfloop transitions, 300 changer transitions 136/750 dead transitions. [2023-11-06 23:08:51,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 750 transitions, 7837 flow [2023-11-06 23:08:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-06 23:08:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-06 23:08:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4624 transitions. [2023-11-06 23:08:51,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805761316872428 [2023-11-06 23:08:51,065 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4624 transitions. [2023-11-06 23:08:51,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4624 transitions. [2023-11-06 23:08:51,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:51,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4624 transitions. [2023-11-06 23:08:51,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 85.62962962962963) internal successors, (4624), 54 states have internal predecessors, (4624), 0 states have call successors, (0), 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 23:08:51,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 225.0) internal successors, (12375), 55 states have internal predecessors, (12375), 0 states have call successors, (0), 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 23:08:51,107 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 225.0) internal successors, (12375), 55 states have internal predecessors, (12375), 0 states have call successors, (0), 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 23:08:51,108 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 1254 flow. Second operand 54 states and 4624 transitions. [2023-11-06 23:08:51,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 750 transitions, 7837 flow [2023-11-06 23:08:51,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 750 transitions, 6700 flow, removed 233 selfloop flow, removed 16 redundant places. [2023-11-06 23:08:51,341 INFO L231 Difference]: Finished difference. Result has 176 places, 364 transitions, 4897 flow [2023-11-06 23:08:51,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=4897, PETRI_PLACES=176, PETRI_TRANSITIONS=364} [2023-11-06 23:08:51,344 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 157 predicate places. [2023-11-06 23:08:51,345 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 364 transitions, 4897 flow [2023-11-06 23:08:51,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 79.71875) internal successors, (2551), 32 states have internal predecessors, (2551), 0 states have call successors, (0), 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 23:08:51,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:51,346 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:51,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 23:08:51,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:08:51,552 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 23:08:51,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:51,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2073959156, now seen corresponding path program 10 times [2023-11-06 23:08:51,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:51,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827106239] [2023-11-06 23:08:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:51,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:52,279 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 23:08:52,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:52,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827106239] [2023-11-06 23:08:52,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827106239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:52,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562105220] [2023-11-06 23:08:52,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:08:52,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:52,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:52,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:52,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:08:52,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:08:52,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:52,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:08:52,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:08:52,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:52,872 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:08:52,872 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 28 treesize of output 11 [2023-11-06 23:08:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:08:52,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562105220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:52,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:08:52,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 30 [2023-11-06 23:08:52,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286692991] [2023-11-06 23:08:52,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:52,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:08:52,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:52,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:08:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:08:53,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 225 [2023-11-06 23:08:53,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 364 transitions, 4897 flow. Second operand has 32 states, 32 states have (on average 90.875) internal successors, (2908), 32 states have internal predecessors, (2908), 0 states have call successors, (0), 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 23:08:53,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:53,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 225 [2023-11-06 23:08:53,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:02,010 INFO L124 PetriNetUnfolderBase]: 12647/23222 cut-off events. [2023-11-06 23:09:02,011 INFO L125 PetriNetUnfolderBase]: For 168652/168652 co-relation queries the response was YES. [2023-11-06 23:09:02,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117819 conditions, 23222 events. 12647/23222 cut-off events. For 168652/168652 co-relation queries the response was YES. Maximal size of possible extension queue 1266. Compared 206367 event pairs, 666 based on Foata normal form. 128/23350 useless extension candidates. Maximal degree in co-relation 112963. Up to 11257 conditions per place. [2023-11-06 23:09:02,208 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 246 selfloop transitions, 860 changer transitions 217/1323 dead transitions. [2023-11-06 23:09:02,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 1323 transitions, 17499 flow [2023-11-06 23:09:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-06 23:09:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-11-06 23:09:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6690 transitions. [2023-11-06 23:09:02,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43091787439613527 [2023-11-06 23:09:02,221 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6690 transitions. [2023-11-06 23:09:02,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6690 transitions. [2023-11-06 23:09:02,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:02,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6690 transitions. [2023-11-06 23:09:02,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 96.95652173913044) internal successors, (6690), 69 states have internal predecessors, (6690), 0 states have call successors, (0), 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 23:09:02,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 225.0) internal successors, (15750), 70 states have internal predecessors, (15750), 0 states have call successors, (0), 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 23:09:02,262 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 225.0) internal successors, (15750), 70 states have internal predecessors, (15750), 0 states have call successors, (0), 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 23:09:02,262 INFO L175 Difference]: Start difference. First operand has 176 places, 364 transitions, 4897 flow. Second operand 69 states and 6690 transitions. [2023-11-06 23:09:02,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 1323 transitions, 17499 flow [2023-11-06 23:09:03,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 1323 transitions, 16111 flow, removed 628 selfloop flow, removed 7 redundant places. [2023-11-06 23:09:03,304 INFO L231 Difference]: Finished difference. Result has 273 places, 893 transitions, 14754 flow [2023-11-06 23:09:03,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=4445, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=14754, PETRI_PLACES=273, PETRI_TRANSITIONS=893} [2023-11-06 23:09:03,305 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 254 predicate places. [2023-11-06 23:09:03,305 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 893 transitions, 14754 flow [2023-11-06 23:09:03,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 90.875) internal successors, (2908), 32 states have internal predecessors, (2908), 0 states have call successors, (0), 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 23:09:03,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:03,306 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:03,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:03,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:09:03,512 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 23:09:03,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:03,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2076718218, now seen corresponding path program 11 times [2023-11-06 23:09:03,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:03,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970260792] [2023-11-06 23:09:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:03,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:04,488 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 23:09:04,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:04,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970260792] [2023-11-06 23:09:04,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970260792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:04,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737921561] [2023-11-06 23:09:04,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:09:04,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:04,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:04,491 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:04,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:09:04,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:09:04,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:04,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 23:09:04,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:04,648 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 23:09:05,020 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 23:09:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:05,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:05,409 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:05,409 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 47 treesize of output 35 [2023-11-06 23:09:05,415 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 23:09:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:09:05,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737921561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:05,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:05,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 38 [2023-11-06 23:09:05,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946705409] [2023-11-06 23:09:05,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:05,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 23:09:05,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:05,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 23:09:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1426, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 23:09:06,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 225 [2023-11-06 23:09:06,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 893 transitions, 14754 flow. Second operand has 40 states, 40 states have (on average 81.575) internal successors, (3263), 40 states have internal predecessors, (3263), 0 states have call successors, (0), 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 23:09:06,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:06,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 225 [2023-11-06 23:09:06,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:18,163 INFO L124 PetriNetUnfolderBase]: 12983/23831 cut-off events. [2023-11-06 23:09:18,163 INFO L125 PetriNetUnfolderBase]: For 638317/638317 co-relation queries the response was YES. [2023-11-06 23:09:18,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158343 conditions, 23831 events. 12983/23831 cut-off events. For 638317/638317 co-relation queries the response was YES. Maximal size of possible extension queue 1306. Compared 212553 event pairs, 698 based on Foata normal form. 1/23832 useless extension candidates. Maximal degree in co-relation 156647. Up to 11551 conditions per place. [2023-11-06 23:09:18,487 INFO L140 encePairwiseOnDemand]: 219/225 looper letters, 131 selfloop transitions, 903 changer transitions 119/1153 dead transitions. [2023-11-06 23:09:18,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 1153 transitions, 19483 flow [2023-11-06 23:09:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 23:09:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 23:09:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3578 transitions. [2023-11-06 23:09:18,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878590785907859 [2023-11-06 23:09:18,496 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3578 transitions. [2023-11-06 23:09:18,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3578 transitions. [2023-11-06 23:09:18,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:18,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3578 transitions. [2023-11-06 23:09:18,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 87.26829268292683) internal successors, (3578), 41 states have internal predecessors, (3578), 0 states have call successors, (0), 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 23:09:18,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 225.0) internal successors, (9450), 42 states have internal predecessors, (9450), 0 states have call successors, (0), 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 23:09:18,522 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 225.0) internal successors, (9450), 42 states have internal predecessors, (9450), 0 states have call successors, (0), 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 23:09:18,522 INFO L175 Difference]: Start difference. First operand has 273 places, 893 transitions, 14754 flow. Second operand 41 states and 3578 transitions. [2023-11-06 23:09:18,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 1153 transitions, 19483 flow [2023-11-06 23:09:26,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1153 transitions, 18062 flow, removed 564 selfloop flow, removed 20 redundant places. [2023-11-06 23:09:26,426 INFO L231 Difference]: Finished difference. Result has 294 places, 928 transitions, 15838 flow [2023-11-06 23:09:26,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=13554, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=869, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=15838, PETRI_PLACES=294, PETRI_TRANSITIONS=928} [2023-11-06 23:09:26,428 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 275 predicate places. [2023-11-06 23:09:26,428 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 928 transitions, 15838 flow [2023-11-06 23:09:26,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 81.575) internal successors, (3263), 40 states have internal predecessors, (3263), 0 states have call successors, (0), 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 23:09:26,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:26,429 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:26,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:26,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:09:26,635 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 23:09:26,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:26,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1691412404, now seen corresponding path program 12 times [2023-11-06 23:09:26,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:26,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972308072] [2023-11-06 23:09:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:26,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:09:26,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:26,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972308072] [2023-11-06 23:09:26,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972308072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:26,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626326035] [2023-11-06 23:09:26,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:09:26,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:26,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:27,002 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:27,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:09:27,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 23:09:27,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:27,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:09:27,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:09:27,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:09:27,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626326035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:27,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:27,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-06 23:09:27,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800476314] [2023-11-06 23:09:27,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:27,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:09:27,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:09:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:09:28,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 225 [2023-11-06 23:09:28,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 928 transitions, 15838 flow. Second operand has 32 states, 32 states have (on average 94.875) internal successors, (3036), 32 states have internal predecessors, (3036), 0 states have call successors, (0), 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 23:09:28,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:28,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 225 [2023-11-06 23:09:28,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:39,434 INFO L124 PetriNetUnfolderBase]: 14916/28522 cut-off events. [2023-11-06 23:09:39,434 INFO L125 PetriNetUnfolderBase]: For 904424/904424 co-relation queries the response was YES. [2023-11-06 23:09:39,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173686 conditions, 28522 events. 14916/28522 cut-off events. For 904424/904424 co-relation queries the response was YES. Maximal size of possible extension queue 1490. Compared 272452 event pairs, 6945 based on Foata normal form. 1368/29890 useless extension candidates. Maximal degree in co-relation 173557. Up to 14505 conditions per place. [2023-11-06 23:09:39,752 INFO L140 encePairwiseOnDemand]: 221/225 looper letters, 493 selfloop transitions, 6 changer transitions 636/1135 dead transitions. [2023-11-06 23:09:39,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1135 transitions, 20727 flow [2023-11-06 23:09:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:09:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:09:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1588 transitions. [2023-11-06 23:09:39,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411111111111111 [2023-11-06 23:09:39,756 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1588 transitions. [2023-11-06 23:09:39,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1588 transitions. [2023-11-06 23:09:39,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:39,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1588 transitions. [2023-11-06 23:09:39,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 99.25) internal successors, (1588), 16 states have internal predecessors, (1588), 0 states have call successors, (0), 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 23:09:39,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 225.0) internal successors, (3825), 17 states have internal predecessors, (3825), 0 states have call successors, (0), 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 23:09:39,765 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 225.0) internal successors, (3825), 17 states have internal predecessors, (3825), 0 states have call successors, (0), 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 23:09:39,765 INFO L175 Difference]: Start difference. First operand has 294 places, 928 transitions, 15838 flow. Second operand 16 states and 1588 transitions. [2023-11-06 23:09:39,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1135 transitions, 20727 flow [2023-11-06 23:09:54,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1135 transitions, 20302 flow, removed 141 selfloop flow, removed 16 redundant places. [2023-11-06 23:09:54,930 INFO L231 Difference]: Finished difference. Result has 299 places, 499 transitions, 9212 flow [2023-11-06 23:09:54,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=11381, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9212, PETRI_PLACES=299, PETRI_TRANSITIONS=499} [2023-11-06 23:09:54,931 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 280 predicate places. [2023-11-06 23:09:54,931 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 499 transitions, 9212 flow [2023-11-06 23:09:54,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 94.875) internal successors, (3036), 32 states have internal predecessors, (3036), 0 states have call successors, (0), 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 23:09:54,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:54,932 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:54,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:55,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:09:55,132 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 23:09:55,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:55,133 INFO L85 PathProgramCache]: Analyzing trace with hash 759127898, now seen corresponding path program 13 times [2023-11-06 23:09:55,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:55,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158187327] [2023-11-06 23:09:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:55,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,299 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 23:09:55,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:55,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158187327] [2023-11-06 23:09:55,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158187327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:55,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341288654] [2023-11-06 23:09:55,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:09:55,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:55,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:55,306 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:55,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:09:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:55,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:55,493 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 23:09:55,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:55,556 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 23:09:55,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341288654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:55,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:55,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-11-06 23:09:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845838983] [2023-11-06 23:09:55,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:55,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:09:55,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:09:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:09:55,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 225 [2023-11-06 23:09:55,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 499 transitions, 9212 flow. Second operand has 8 states, 8 states have (on average 106.5) internal successors, (852), 8 states have internal predecessors, (852), 0 states have call successors, (0), 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 23:09:55,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:55,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 225 [2023-11-06 23:09:55,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:02,559 INFO L124 PetriNetUnfolderBase]: 12180/22229 cut-off events. [2023-11-06 23:10:02,560 INFO L125 PetriNetUnfolderBase]: For 726507/726507 co-relation queries the response was YES. [2023-11-06 23:10:02,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165113 conditions, 22229 events. 12180/22229 cut-off events. For 726507/726507 co-relation queries the response was YES. Maximal size of possible extension queue 1225. Compared 195532 event pairs, 1685 based on Foata normal form. 18/22247 useless extension candidates. Maximal degree in co-relation 164996. Up to 10787 conditions per place. [2023-11-06 23:10:02,797 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 242 selfloop transitions, 642 changer transitions 0/884 dead transitions. [2023-11-06 23:10:02,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 884 transitions, 18397 flow [2023-11-06 23:10:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:10:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:10:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 791 transitions. [2023-11-06 23:10:02,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022222222222222 [2023-11-06 23:10:02,799 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 791 transitions. [2023-11-06 23:10:02,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 791 transitions. [2023-11-06 23:10:02,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:02,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 791 transitions. [2023-11-06 23:10:02,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.0) internal successors, (791), 7 states have internal predecessors, (791), 0 states have call successors, (0), 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 23:10:02,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 225.0) internal successors, (1800), 8 states have internal predecessors, (1800), 0 states have call successors, (0), 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 23:10:02,804 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 225.0) internal successors, (1800), 8 states have internal predecessors, (1800), 0 states have call successors, (0), 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 23:10:02,804 INFO L175 Difference]: Start difference. First operand has 299 places, 499 transitions, 9212 flow. Second operand 7 states and 791 transitions. [2023-11-06 23:10:02,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 884 transitions, 18397 flow [2023-11-06 23:10:06,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 884 transitions, 16853 flow, removed 677 selfloop flow, removed 38 redundant places. [2023-11-06 23:10:06,809 INFO L231 Difference]: Finished difference. Result has 236 places, 843 transitions, 16442 flow [2023-11-06 23:10:06,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=8338, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16442, PETRI_PLACES=236, PETRI_TRANSITIONS=843} [2023-11-06 23:10:06,810 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 217 predicate places. [2023-11-06 23:10:06,810 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 843 transitions, 16442 flow [2023-11-06 23:10:06,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.5) internal successors, (852), 8 states have internal predecessors, (852), 0 states have call successors, (0), 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 23:10:06,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:06,810 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:06,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-06 23:10:07,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:10:07,011 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 23:10:07,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:07,012 INFO L85 PathProgramCache]: Analyzing trace with hash -141834894, now seen corresponding path program 14 times [2023-11-06 23:10:07,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:07,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598506987] [2023-11-06 23:10:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:07,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:07,817 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 23:10:07,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:07,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598506987] [2023-11-06 23:10:07,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598506987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:07,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468062516] [2023-11-06 23:10:07,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:07,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:07,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:07,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:07,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:10:07,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:07,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:07,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 23:10:07,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:08,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:08,414 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:10:08,414 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 27 treesize of output 11 [2023-11-06 23:10:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:10:08,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468062516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:08,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:08,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 8] total 38 [2023-11-06 23:10:08,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930603699] [2023-11-06 23:10:08,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:08,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 23:10:08,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:08,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 23:10:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 23:10:09,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 225 [2023-11-06 23:10:09,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 843 transitions, 16442 flow. Second operand has 40 states, 40 states have (on average 90.625) internal successors, (3625), 40 states have internal predecessors, (3625), 0 states have call successors, (0), 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 23:10:09,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:09,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 225 [2023-11-06 23:10:09,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:23,805 INFO L124 PetriNetUnfolderBase]: 16782/30667 cut-off events. [2023-11-06 23:10:23,805 INFO L125 PetriNetUnfolderBase]: For 764383/764383 co-relation queries the response was YES. [2023-11-06 23:10:24,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209968 conditions, 30667 events. 16782/30667 cut-off events. For 764383/764383 co-relation queries the response was YES. Maximal size of possible extension queue 1777. Compared 284512 event pairs, 1945 based on Foata normal form. 20/30687 useless extension candidates. Maximal degree in co-relation 209877. Up to 14903 conditions per place. [2023-11-06 23:10:24,110 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 440 selfloop transitions, 1069 changer transitions 292/1801 dead transitions. [2023-11-06 23:10:24,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1801 transitions, 31875 flow [2023-11-06 23:10:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-06 23:10:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-11-06 23:10:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 9503 transitions. [2023-11-06 23:10:24,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309750566893424 [2023-11-06 23:10:24,126 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 9503 transitions. [2023-11-06 23:10:24,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 9503 transitions. [2023-11-06 23:10:24,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:24,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 9503 transitions. [2023-11-06 23:10:24,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 96.96938775510205) internal successors, (9503), 98 states have internal predecessors, (9503), 0 states have call successors, (0), 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 23:10:24,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 225.0) internal successors, (22275), 99 states have internal predecessors, (22275), 0 states have call successors, (0), 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 23:10:24,185 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 225.0) internal successors, (22275), 99 states have internal predecessors, (22275), 0 states have call successors, (0), 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 23:10:24,185 INFO L175 Difference]: Start difference. First operand has 236 places, 843 transitions, 16442 flow. Second operand 98 states and 9503 transitions. [2023-11-06 23:10:24,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1801 transitions, 31875 flow [2023-11-06 23:10:36,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1801 transitions, 29907 flow, removed 984 selfloop flow, removed 0 redundant places. [2023-11-06 23:10:36,816 INFO L231 Difference]: Finished difference. Result has 355 places, 1225 transitions, 25659 flow [2023-11-06 23:10:36,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=15764, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=696, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=25659, PETRI_PLACES=355, PETRI_TRANSITIONS=1225} [2023-11-06 23:10:36,817 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 336 predicate places. [2023-11-06 23:10:36,818 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 1225 transitions, 25659 flow [2023-11-06 23:10:36,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 90.625) internal successors, (3625), 40 states have internal predecessors, (3625), 0 states have call successors, (0), 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 23:10:36,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:36,819 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:36,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:37,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:10:37,025 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 23:10:37,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:37,026 INFO L85 PathProgramCache]: Analyzing trace with hash 142556006, now seen corresponding path program 15 times [2023-11-06 23:10:37,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:37,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53591321] [2023-11-06 23:10:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:37,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:37,975 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 23:10:37,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:37,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53591321] [2023-11-06 23:10:37,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53591321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:37,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118060229] [2023-11-06 23:10:37,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:10:37,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:37,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:37,977 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:37,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74239178-3fb4-4a67-be57-83f6b4cdeb07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:10:38,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 23:10:38,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:38,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 23:10:38,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:38,994 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 23:10:39,057 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 23:10:39,104 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 23:10:40,080 INFO L322 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2023-11-06 23:10:40,080 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 41 treesize of output 13 [2023-11-06 23:10:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:10:40,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:41,977 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:41,977 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 97 treesize of output 73 [2023-11-06 23:10:42,003 INFO L322 Elim1Store]: treesize reduction 10, result has 54.5 percent of original size [2023-11-06 23:10:42,004 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 240 treesize of output 220 [2023-11-06 23:10:42,024 INFO L322 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-06 23:10:42,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 209 treesize of output 159 [2023-11-06 23:10:42,045 INFO L322 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-06 23:10:42,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 138 treesize of output 113 [2023-11-06 23:10:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:10:42,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118060229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:42,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:42,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 45 [2023-11-06 23:10:42,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681242920] [2023-11-06 23:10:42,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:42,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-06 23:10:42,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:42,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-06 23:10:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1849, Unknown=1, NotChecked=0, Total=2162 [2023-11-06 23:10:43,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 225 [2023-11-06 23:10:43,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1225 transitions, 25659 flow. Second operand has 47 states, 47 states have (on average 66.51063829787235) internal successors, (3126), 47 states have internal predecessors, (3126), 0 states have call successors, (0), 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 23:10:43,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:43,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 225 [2023-11-06 23:10:43,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:52,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]