./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/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_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/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_68d814d6-1602-4548-9e97-11dd4d77c8ed/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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:01:14,649 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:01:14,765 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:01:14,774 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:01:14,778 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:01:14,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:01:14,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:01:14,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:01:14,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:01:14,819 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:01:14,820 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:01:14,820 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:01:14,821 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:01:14,822 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:01:14,822 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:01:14,823 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:01:14,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:01:14,825 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:01:14,825 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:01:14,826 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:01:14,827 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:01:14,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:01:14,828 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:01:14,829 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:01:14,829 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:01:14,830 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:01:14,830 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:01:14,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:01:14,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:01:14,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:01:14,833 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:01:14,833 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:01:14,834 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:01:14,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:01:14,835 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:01:14,835 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:01:14,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:01:14,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:01:14,837 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:01:14,837 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_68d814d6-1602-4548-9e97-11dd4d77c8ed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2023-11-06 22:01:15,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:01:15,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:01:15,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:01:15,201 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:01:15,201 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:01:15,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-06 22:01:18,369 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:01:18,681 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:01:18,682 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-06 22:01:18,693 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/data/9e3ec7a95/e70c7c3d990b41b7b78a7b24f39cacab/FLAG99536193c [2023-11-06 22:01:18,716 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/data/9e3ec7a95/e70c7c3d990b41b7b78a7b24f39cacab [2023-11-06 22:01:18,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:01:18,726 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:01:18,730 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:01:18,730 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:01:18,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:01:18,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:18" (1/1) ... [2023-11-06 22:01:18,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f89b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:18, skipping insertion in model container [2023-11-06 22:01:18,738 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:18" (1/1) ... [2023-11-06 22:01:18,778 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:01:19,012 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_68d814d6-1602-4548-9e97-11dd4d77c8ed/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-11-06 22:01:19,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:01:19,033 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:01:19,059 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_68d814d6-1602-4548-9e97-11dd4d77c8ed/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-11-06 22:01:19,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:01:19,073 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:01:19,073 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:01:19,081 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:01:19,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19 WrapperNode [2023-11-06 22:01:19,082 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:01:19,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:01:19,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:01:19,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:01:19,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,102 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,133 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 169 [2023-11-06 22:01:19,134 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:01:19,135 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:01:19,135 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:01:19,135 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:01:19,145 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,145 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,149 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,169 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,175 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:01:19,177 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:01:19,177 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:01:19,177 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:01:19,178 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (1/1) ... [2023-11-06 22:01:19,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:01:19,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:19,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:01:19,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:01:19,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:01:19,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:01:19,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:01:19,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:01:19,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:01:19,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:01:19,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:01:19,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:01:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:01:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:01:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:01:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:01:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:01:19,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:01:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:01:19,285 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:01:19,396 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:01:19,398 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:01:19,706 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:01:19,835 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:01:19,835 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:01:19,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:19 BoogieIcfgContainer [2023-11-06 22:01:19,838 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:01:19,841 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:01:19,842 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:01:19,845 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:01:19,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:01:18" (1/3) ... [2023-11-06 22:01:19,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e65850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:19, skipping insertion in model container [2023-11-06 22:01:19,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:19" (2/3) ... [2023-11-06 22:01:19,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e65850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:19, skipping insertion in model container [2023-11-06 22:01:19,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:19" (3/3) ... [2023-11-06 22:01:19,849 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-11-06 22:01:19,859 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:01:19,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:01:19,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:01:19,871 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:01:19,958 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:01:20,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 148 transitions, 310 flow [2023-11-06 22:01:20,103 INFO L124 PetriNetUnfolderBase]: 11/146 cut-off events. [2023-11-06 22:01:20,104 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:01:20,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 146 events. 11/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 81 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 109. Up to 3 conditions per place. [2023-11-06 22:01:20,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 148 transitions, 310 flow [2023-11-06 22:01:20,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 137 transitions, 286 flow [2023-11-06 22:01:20,123 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:01:20,141 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 137 transitions, 286 flow [2023-11-06 22:01:20,152 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 137 transitions, 286 flow [2023-11-06 22:01:20,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 137 transitions, 286 flow [2023-11-06 22:01:20,262 INFO L124 PetriNetUnfolderBase]: 11/137 cut-off events. [2023-11-06 22:01:20,262 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:01:20,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 137 events. 11/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 109. Up to 3 conditions per place. [2023-11-06 22:01:20,264 INFO L119 LiptonReduction]: Number of co-enabled transitions 732 [2023-11-06 22:01:26,237 INFO L134 LiptonReduction]: Checked pairs total: 910 [2023-11-06 22:01:26,238 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-11-06 22:01:26,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:01:26,264 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;@3f35babf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:01:26,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:01:26,270 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:01:26,270 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-06 22:01:26,270 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:01:26,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:26,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:26,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:26,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:26,278 INFO L85 PathProgramCache]: Analyzing trace with hash -895505358, now seen corresponding path program 1 times [2023-11-06 22:01:26,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:26,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504906289] [2023-11-06 22:01:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:26,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:26,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504906289] [2023-11-06 22:01:26,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504906289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:26,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:26,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:01:26,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9759307] [2023-11-06 22:01:26,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:26,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:01:26,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:26,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:01:26,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:01:26,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-11-06 22:01:26,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:26,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:26,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-11-06 22:01:26,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:26,847 INFO L124 PetriNetUnfolderBase]: 42/75 cut-off events. [2023-11-06 22:01:26,847 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 22:01:26,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 75 events. 42/75 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 126 event pairs, 3 based on Foata normal form. 2/56 useless extension candidates. Maximal degree in co-relation 119. Up to 65 conditions per place. [2023-11-06 22:01:26,850 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-06 22:01:26,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 105 flow [2023-11-06 22:01:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:01:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:01:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-11-06 22:01:26,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689655172413793 [2023-11-06 22:01:26,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-11-06 22:01:26,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-11-06 22:01:26,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:26,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-11-06 22:01:26,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:26,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:26,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:26,890 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 408 transitions. [2023-11-06 22:01:26,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 105 flow [2023-11-06 22:01:26,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 23 transitions, 95 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:01:26,895 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 59 flow [2023-11-06 22:01:26,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-06 22:01:26,902 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-06 22:01:26,902 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 59 flow [2023-11-06 22:01:26,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:26,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:26,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:26,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:01:26,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:26,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:26,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1342980178, now seen corresponding path program 2 times [2023-11-06 22:01:26,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:26,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289252215] [2023-11-06 22:01:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:26,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:27,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:27,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289252215] [2023-11-06 22:01:27,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289252215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:27,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:27,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:01:27,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353193429] [2023-11-06 22:01:27,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:27,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:01:27,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:01:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:01:27,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 290 [2023-11-06 22:01:27,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:27,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:27,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 290 [2023-11-06 22:01:27,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:27,270 INFO L124 PetriNetUnfolderBase]: 43/85 cut-off events. [2023-11-06 22:01:27,270 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-06 22:01:27,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 85 events. 43/85 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 20 based on Foata normal form. 6/69 useless extension candidates. Maximal degree in co-relation 75. Up to 75 conditions per place. [2023-11-06 22:01:27,272 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 17 selfloop transitions, 2 changer transitions 6/26 dead transitions. [2023-11-06 22:01:27,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 26 transitions, 125 flow [2023-11-06 22:01:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:01:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:01:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 521 transitions. [2023-11-06 22:01:27,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44913793103448274 [2023-11-06 22:01:27,279 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 521 transitions. [2023-11-06 22:01:27,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 521 transitions. [2023-11-06 22:01:27,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:27,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 521 transitions. [2023-11-06 22:01:27,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:27,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:27,293 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:27,294 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 59 flow. Second operand 4 states and 521 transitions. [2023-11-06 22:01:27,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 26 transitions, 125 flow [2023-11-06 22:01:27,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 122 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:01:27,297 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 72 flow [2023-11-06 22:01:27,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-06 22:01:27,299 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-11-06 22:01:27,304 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 72 flow [2023-11-06 22:01:27,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:27,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:27,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:27,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:01:27,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:27,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1454278528, now seen corresponding path program 1 times [2023-11-06 22:01:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:27,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5386493] [2023-11-06 22:01:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:27,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5386493] [2023-11-06 22:01:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5386493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:28,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:28,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:01:28,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054015547] [2023-11-06 22:01:28,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:28,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:01:28,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:28,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:01:28,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:01:28,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2023-11-06 22:01:28,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 118.875) internal successors, (951), 8 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:28,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:28,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2023-11-06 22:01:28,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:28,323 INFO L124 PetriNetUnfolderBase]: 64/122 cut-off events. [2023-11-06 22:01:28,324 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 22:01:28,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 122 events. 64/122 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 337 event pairs, 1 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 316. Up to 71 conditions per place. [2023-11-06 22:01:28,326 INFO L140 encePairwiseOnDemand]: 281/290 looper letters, 31 selfloop transitions, 9 changer transitions 5/45 dead transitions. [2023-11-06 22:01:28,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 227 flow [2023-11-06 22:01:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:01:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:01:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 981 transitions. [2023-11-06 22:01:28,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228448275862069 [2023-11-06 22:01:28,331 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 981 transitions. [2023-11-06 22:01:28,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 981 transitions. [2023-11-06 22:01:28,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:28,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 981 transitions. [2023-11-06 22:01:28,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.625) internal successors, (981), 8 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:28,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:28,343 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:28,344 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 72 flow. Second operand 8 states and 981 transitions. [2023-11-06 22:01:28,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 227 flow [2023-11-06 22:01:28,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 45 transitions, 219 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 22:01:28,346 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 112 flow [2023-11-06 22:01:28,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=112, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-06 22:01:28,348 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-06 22:01:28,348 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 112 flow [2023-11-06 22:01:28,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 118.875) internal successors, (951), 8 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:28,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:28,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:28,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:01:28,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:28,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1462228346, now seen corresponding path program 2 times [2023-11-06 22:01:28,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:28,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113595281] [2023-11-06 22:01:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113595281] [2023-11-06 22:01:28,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113595281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:28,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:28,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:01:28,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105547318] [2023-11-06 22:01:28,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:28,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:01:28,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:01:28,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:01:29,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 290 [2023-11-06 22:01:29,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 117.875) internal successors, (943), 8 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:29,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:29,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 290 [2023-11-06 22:01:29,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:29,219 INFO L124 PetriNetUnfolderBase]: 70/134 cut-off events. [2023-11-06 22:01:29,219 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-11-06 22:01:29,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 134 events. 70/134 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 355 event pairs, 9 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 440. Up to 98 conditions per place. [2023-11-06 22:01:29,222 INFO L140 encePairwiseOnDemand]: 281/290 looper letters, 28 selfloop transitions, 11 changer transitions 5/44 dead transitions. [2023-11-06 22:01:29,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 276 flow [2023-11-06 22:01:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:01:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:01:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 968 transitions. [2023-11-06 22:01:29,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41724137931034483 [2023-11-06 22:01:29,230 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 968 transitions. [2023-11-06 22:01:29,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 968 transitions. [2023-11-06 22:01:29,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:29,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 968 transitions. [2023-11-06 22:01:29,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:29,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:29,244 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:29,244 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 112 flow. Second operand 8 states and 968 transitions. [2023-11-06 22:01:29,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 276 flow [2023-11-06 22:01:29,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 244 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-06 22:01:29,249 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 165 flow [2023-11-06 22:01:29,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=165, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-06 22:01:29,250 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-11-06 22:01:29,250 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 165 flow [2023-11-06 22:01:29,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.875) internal successors, (943), 8 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:29,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:29,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:29,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:01:29,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:29,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1071558996, now seen corresponding path program 3 times [2023-11-06 22:01:29,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:29,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052411263] [2023-11-06 22:01:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:29,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:29,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:29,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052411263] [2023-11-06 22:01:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052411263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:29,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:29,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:01:29,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449668926] [2023-11-06 22:01:29,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:29,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:01:29,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:01:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:01:29,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 290 [2023-11-06 22:01:29,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 117.875) internal successors, (943), 8 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:29,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:29,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 290 [2023-11-06 22:01:29,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:29,883 INFO L124 PetriNetUnfolderBase]: 66/130 cut-off events. [2023-11-06 22:01:29,883 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-06 22:01:29,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 130 events. 66/130 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 354 event pairs, 11 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 457. Up to 94 conditions per place. [2023-11-06 22:01:29,888 INFO L140 encePairwiseOnDemand]: 281/290 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2023-11-06 22:01:29,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 298 flow [2023-11-06 22:01:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:01:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:01:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 968 transitions. [2023-11-06 22:01:29,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41724137931034483 [2023-11-06 22:01:29,893 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 968 transitions. [2023-11-06 22:01:29,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 968 transitions. [2023-11-06 22:01:29,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:29,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 968 transitions. [2023-11-06 22:01:29,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:29,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:29,904 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:29,904 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 165 flow. Second operand 8 states and 968 transitions. [2023-11-06 22:01:29,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 298 flow [2023-11-06 22:01:29,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 281 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 22:01:29,912 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 184 flow [2023-11-06 22:01:29,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-11-06 22:01:29,915 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-11-06 22:01:29,915 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 184 flow [2023-11-06 22:01:29,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.875) internal successors, (943), 8 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:29,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:29,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:29,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:01:29,917 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:29,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:29,917 INFO L85 PathProgramCache]: Analyzing trace with hash -423598725, now seen corresponding path program 1 times [2023-11-06 22:01:29,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:29,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434642224] [2023-11-06 22:01:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:29,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:30,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:30,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434642224] [2023-11-06 22:01:30,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434642224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:30,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160506860] [2023-11-06 22:01:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:30,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:30,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:30,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:30,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:01:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:30,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:01:30,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:30,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:30,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160506860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:30,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:30,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:01:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826877150] [2023-11-06 22:01:30,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:30,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:01:30,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:01:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:01:30,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 290 [2023-11-06 22:01:30,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 184 flow. Second operand has 12 states, 12 states have (on average 122.08333333333333) internal successors, (1465), 12 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:30,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:30,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 290 [2023-11-06 22:01:30,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:30,778 INFO L124 PetriNetUnfolderBase]: 98/203 cut-off events. [2023-11-06 22:01:30,778 INFO L125 PetriNetUnfolderBase]: For 303/311 co-relation queries the response was YES. [2023-11-06 22:01:30,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 203 events. 98/203 cut-off events. For 303/311 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 704 event pairs, 32 based on Foata normal form. 8/203 useless extension candidates. Maximal degree in co-relation 761. Up to 112 conditions per place. [2023-11-06 22:01:30,781 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 46 selfloop transitions, 7 changer transitions 4/59 dead transitions. [2023-11-06 22:01:30,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 454 flow [2023-11-06 22:01:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:01:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:01:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 758 transitions. [2023-11-06 22:01:30,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435632183908046 [2023-11-06 22:01:30,785 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 758 transitions. [2023-11-06 22:01:30,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 758 transitions. [2023-11-06 22:01:30,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:30,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 758 transitions. [2023-11-06 22:01:30,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:30,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:30,794 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:30,794 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 184 flow. Second operand 6 states and 758 transitions. [2023-11-06 22:01:30,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 454 flow [2023-11-06 22:01:30,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 404 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-06 22:01:30,800 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 237 flow [2023-11-06 22:01:30,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-06 22:01:30,803 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-11-06 22:01:30,803 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 237 flow [2023-11-06 22:01:30,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 122.08333333333333) internal successors, (1465), 12 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:30,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:30,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:30,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:31,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:31,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:31,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:31,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1091421400, now seen corresponding path program 1 times [2023-11-06 22:01:31,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:31,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344765428] [2023-11-06 22:01:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:31,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:31,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:31,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344765428] [2023-11-06 22:01:31,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344765428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:31,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779243035] [2023-11-06 22:01:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:31,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:31,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:31,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:31,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:01:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:31,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:01:31,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:31,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:31,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779243035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:31,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:01:31,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-06 22:01:31,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248966550] [2023-11-06 22:01:31,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:31,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:01:31,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:31,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:01:31,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:01:31,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-11-06 22:01:31,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:31,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:31,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-11-06 22:01:31,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:31,425 INFO L124 PetriNetUnfolderBase]: 109/232 cut-off events. [2023-11-06 22:01:31,425 INFO L125 PetriNetUnfolderBase]: For 369/377 co-relation queries the response was YES. [2023-11-06 22:01:31,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 232 events. 109/232 cut-off events. For 369/377 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 867 event pairs, 15 based on Foata normal form. 20/229 useless extension candidates. Maximal degree in co-relation 622. Up to 89 conditions per place. [2023-11-06 22:01:31,428 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 34 selfloop transitions, 10 changer transitions 11/57 dead transitions. [2023-11-06 22:01:31,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 425 flow [2023-11-06 22:01:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:01:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:01:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 552 transitions. [2023-11-06 22:01:31,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47586206896551725 [2023-11-06 22:01:31,432 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 552 transitions. [2023-11-06 22:01:31,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 552 transitions. [2023-11-06 22:01:31,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:31,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 552 transitions. [2023-11-06 22:01:31,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:31,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:31,438 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:31,438 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 237 flow. Second operand 4 states and 552 transitions. [2023-11-06 22:01:31,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 425 flow [2023-11-06 22:01:31,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 400 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-06 22:01:31,444 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 205 flow [2023-11-06 22:01:31,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-11-06 22:01:31,445 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-06 22:01:31,445 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 205 flow [2023-11-06 22:01:31,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:31,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:31,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:31,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:31,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:31,651 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:31,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1335303611, now seen corresponding path program 2 times [2023-11-06 22:01:31,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:31,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791756596] [2023-11-06 22:01:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:31,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:32,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:32,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791756596] [2023-11-06 22:01:32,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791756596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:32,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481875651] [2023-11-06 22:01:32,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:01:32,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:32,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:32,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:32,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:01:32,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:01:32,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:32,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:01:32,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:32,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:32,815 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:01:32,816 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-06 22:01:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:33,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481875651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:33,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:33,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 22:01:33,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187991374] [2023-11-06 22:01:33,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:33,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:01:33,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:33,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:01:33,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:01:33,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 290 [2023-11-06 22:01:33,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 205 flow. Second operand has 20 states, 20 states have (on average 114.1) internal successors, (2282), 20 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:33,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:33,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 290 [2023-11-06 22:01:33,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:34,861 INFO L124 PetriNetUnfolderBase]: 273/520 cut-off events. [2023-11-06 22:01:34,862 INFO L125 PetriNetUnfolderBase]: For 1218/1226 co-relation queries the response was YES. [2023-11-06 22:01:34,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 520 events. 273/520 cut-off events. For 1218/1226 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2245 event pairs, 25 based on Foata normal form. 20/447 useless extension candidates. Maximal degree in co-relation 1502. Up to 293 conditions per place. [2023-11-06 22:01:34,868 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 91 selfloop transitions, 55 changer transitions 0/148 dead transitions. [2023-11-06 22:01:34,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 148 transitions, 1128 flow [2023-11-06 22:01:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:01:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:01:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2250 transitions. [2023-11-06 22:01:34,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40834845735027225 [2023-11-06 22:01:34,878 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2250 transitions. [2023-11-06 22:01:34,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2250 transitions. [2023-11-06 22:01:34,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:34,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2250 transitions. [2023-11-06 22:01:34,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 118.42105263157895) internal successors, (2250), 19 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:34,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:34,901 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:34,901 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 205 flow. Second operand 19 states and 2250 transitions. [2023-11-06 22:01:34,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 148 transitions, 1128 flow [2023-11-06 22:01:34,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 148 transitions, 1003 flow, removed 59 selfloop flow, removed 4 redundant places. [2023-11-06 22:01:34,909 INFO L231 Difference]: Finished difference. Result has 54 places, 91 transitions, 709 flow [2023-11-06 22:01:34,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=709, PETRI_PLACES=54, PETRI_TRANSITIONS=91} [2023-11-06 22:01:34,910 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-11-06 22:01:34,910 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 91 transitions, 709 flow [2023-11-06 22:01:34,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 114.1) internal successors, (2282), 20 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:34,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:34,911 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:34,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:35,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:35,117 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:35,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:35,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1247481531, now seen corresponding path program 3 times [2023-11-06 22:01:35,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:35,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309267912] [2023-11-06 22:01:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:35,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:35,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309267912] [2023-11-06 22:01:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309267912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467973810] [2023-11-06 22:01:35,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:01:35,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:35,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:35,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:35,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:01:35,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:01:35,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:35,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:01:35,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:36,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:36,135 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:01:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:36,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:36,213 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_161 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_161) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-11-06 22:01:36,249 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:36,249 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 45 treesize of output 37 [2023-11-06 22:01:36,267 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 24 treesize of output 18 [2023-11-06 22:01:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:01:36,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467973810] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:36,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:01:36,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 6] total 17 [2023-11-06 22:01:36,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568132928] [2023-11-06 22:01:36,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:36,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:01:36,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:36,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:01:36,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=231, Unknown=1, NotChecked=30, Total=306 [2023-11-06 22:01:36,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-11-06 22:01:36,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 91 transitions, 709 flow. Second operand has 6 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:36,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:36,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-11-06 22:01:36,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:36,654 INFO L124 PetriNetUnfolderBase]: 364/666 cut-off events. [2023-11-06 22:01:36,654 INFO L125 PetriNetUnfolderBase]: For 794/804 co-relation queries the response was YES. [2023-11-06 22:01:36,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2779 conditions, 666 events. 364/666 cut-off events. For 794/804 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2894 event pairs, 87 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 2027. Up to 405 conditions per place. [2023-11-06 22:01:36,662 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 98 selfloop transitions, 31 changer transitions 1/132 dead transitions. [2023-11-06 22:01:36,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 132 transitions, 1245 flow [2023-11-06 22:01:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:01:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:01:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 698 transitions. [2023-11-06 22:01:36,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011494252873563 [2023-11-06 22:01:36,666 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 698 transitions. [2023-11-06 22:01:36,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 698 transitions. [2023-11-06 22:01:36,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:36,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 698 transitions. [2023-11-06 22:01:36,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.33333333333333) internal successors, (698), 6 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:36,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:36,674 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:36,674 INFO L175 Difference]: Start difference. First operand has 54 places, 91 transitions, 709 flow. Second operand 6 states and 698 transitions. [2023-11-06 22:01:36,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 132 transitions, 1245 flow [2023-11-06 22:01:36,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 132 transitions, 1029 flow, removed 106 selfloop flow, removed 2 redundant places. [2023-11-06 22:01:36,685 INFO L231 Difference]: Finished difference. Result has 59 places, 108 transitions, 799 flow [2023-11-06 22:01:36,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=799, PETRI_PLACES=59, PETRI_TRANSITIONS=108} [2023-11-06 22:01:36,686 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-11-06 22:01:36,686 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 108 transitions, 799 flow [2023-11-06 22:01:36,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:36,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:36,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:36,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:36,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:36,892 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:36,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1008414683, now seen corresponding path program 4 times [2023-11-06 22:01:36,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:36,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901596743] [2023-11-06 22:01:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:36,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:37,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:37,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901596743] [2023-11-06 22:01:37,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901596743] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:37,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612549732] [2023-11-06 22:01:37,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:01:37,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:37,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:37,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:01:37,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:01:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:37,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:01:37,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:37,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:01:37,919 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:01:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:37,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:37,981 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_190 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_190) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-11-06 22:01:37,997 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:37,997 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 45 treesize of output 37 [2023-11-06 22:01:38,002 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 24 treesize of output 18 [2023-11-06 22:01:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-06 22:01:38,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612549732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:38,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:38,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2023-11-06 22:01:38,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953446401] [2023-11-06 22:01:38,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:38,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:01:38,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:38,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:01:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=230, Unknown=1, NotChecked=30, Total=306 [2023-11-06 22:01:38,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 290 [2023-11-06 22:01:38,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 108 transitions, 799 flow. Second operand has 18 states, 18 states have (on average 99.16666666666667) internal successors, (1785), 18 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:38,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:38,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 290 [2023-11-06 22:01:38,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:38,964 INFO L124 PetriNetUnfolderBase]: 402/736 cut-off events. [2023-11-06 22:01:38,964 INFO L125 PetriNetUnfolderBase]: For 1052/1064 co-relation queries the response was YES. [2023-11-06 22:01:38,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3019 conditions, 736 events. 402/736 cut-off events. For 1052/1064 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3346 event pairs, 60 based on Foata normal form. 0/625 useless extension candidates. Maximal degree in co-relation 2066. Up to 358 conditions per place. [2023-11-06 22:01:38,972 INFO L140 encePairwiseOnDemand]: 283/290 looper letters, 116 selfloop transitions, 35 changer transitions 0/153 dead transitions. [2023-11-06 22:01:38,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 153 transitions, 1357 flow [2023-11-06 22:01:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:01:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:01:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1122 transitions. [2023-11-06 22:01:38,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2023-11-06 22:01:38,978 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1122 transitions. [2023-11-06 22:01:38,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1122 transitions. [2023-11-06 22:01:38,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:38,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1122 transitions. [2023-11-06 22:01:38,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 102.0) internal successors, (1122), 11 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:38,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:38,990 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:38,991 INFO L175 Difference]: Start difference. First operand has 59 places, 108 transitions, 799 flow. Second operand 11 states and 1122 transitions. [2023-11-06 22:01:38,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 153 transitions, 1357 flow [2023-11-06 22:01:38,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 153 transitions, 1338 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 22:01:39,002 INFO L231 Difference]: Finished difference. Result has 70 places, 116 transitions, 972 flow [2023-11-06 22:01:39,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=972, PETRI_PLACES=70, PETRI_TRANSITIONS=116} [2023-11-06 22:01:39,003 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2023-11-06 22:01:39,003 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 116 transitions, 972 flow [2023-11-06 22:01:39,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.16666666666667) internal successors, (1785), 18 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:39,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:39,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:39,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:01:39,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:01:39,210 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:39,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash 230410483, now seen corresponding path program 1 times [2023-11-06 22:01:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:39,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740677171] [2023-11-06 22:01:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740677171] [2023-11-06 22:01:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740677171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699618985] [2023-11-06 22:01:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:40,177 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:40,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:01:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:40,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:01:40,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:40,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:41,051 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:41,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-06 22:01:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:01:41,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699618985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:41,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:41,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-11-06 22:01:41,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930108016] [2023-11-06 22:01:41,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:41,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:01:41,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:01:41,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:01:42,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:01:45,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 290 [2023-11-06 22:01:45,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 116 transitions, 972 flow. Second operand has 27 states, 27 states have (on average 99.96296296296296) internal successors, (2699), 27 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:45,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:45,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 290 [2023-11-06 22:01:45,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:47,090 INFO L124 PetriNetUnfolderBase]: 440/828 cut-off events. [2023-11-06 22:01:47,090 INFO L125 PetriNetUnfolderBase]: For 1587/1587 co-relation queries the response was YES. [2023-11-06 22:01:47,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3672 conditions, 828 events. 440/828 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3990 event pairs, 111 based on Foata normal form. 2/723 useless extension candidates. Maximal degree in co-relation 2471. Up to 670 conditions per place. [2023-11-06 22:01:47,099 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 131 selfloop transitions, 39 changer transitions 6/176 dead transitions. [2023-11-06 22:01:47,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 176 transitions, 1644 flow [2023-11-06 22:01:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:01:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:01:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1856 transitions. [2023-11-06 22:01:47,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2023-11-06 22:01:47,108 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1856 transitions. [2023-11-06 22:01:47,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1856 transitions. [2023-11-06 22:01:47,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:47,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1856 transitions. [2023-11-06 22:01:47,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 103.11111111111111) internal successors, (1856), 18 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:47,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:47,143 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:47,143 INFO L175 Difference]: Start difference. First operand has 70 places, 116 transitions, 972 flow. Second operand 18 states and 1856 transitions. [2023-11-06 22:01:47,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 176 transitions, 1644 flow [2023-11-06 22:01:47,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 176 transitions, 1625 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-06 22:01:47,159 INFO L231 Difference]: Finished difference. Result has 90 places, 130 transitions, 1200 flow [2023-11-06 22:01:47,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1200, PETRI_PLACES=90, PETRI_TRANSITIONS=130} [2023-11-06 22:01:47,160 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-11-06 22:01:47,160 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 130 transitions, 1200 flow [2023-11-06 22:01:47,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 99.96296296296296) internal successors, (2699), 27 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:47,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:47,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:47,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:47,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:01:47,378 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:47,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1480758795, now seen corresponding path program 2 times [2023-11-06 22:01:47,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:47,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596237377] [2023-11-06 22:01:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:47,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:48,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:48,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596237377] [2023-11-06 22:01:48,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596237377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:48,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86282083] [2023-11-06 22:01:48,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:01:48,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:48,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:48,389 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:48,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:01:48,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:01:48,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:48,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:01:48,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:49,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:49,527 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:49,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-06 22:01:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:01:49,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86282083] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:49,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:49,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-11-06 22:01:49,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036106390] [2023-11-06 22:01:49,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:49,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:01:49,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:01:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:01:52,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 290 [2023-11-06 22:01:52,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 130 transitions, 1200 flow. Second operand has 27 states, 27 states have (on average 99.96296296296296) internal successors, (2699), 27 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:52,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:52,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 290 [2023-11-06 22:01:52,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:53,871 INFO L124 PetriNetUnfolderBase]: 456/862 cut-off events. [2023-11-06 22:01:53,872 INFO L125 PetriNetUnfolderBase]: For 2436/2436 co-relation queries the response was YES. [2023-11-06 22:01:53,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4214 conditions, 862 events. 456/862 cut-off events. For 2436/2436 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4228 event pairs, 123 based on Foata normal form. 2/762 useless extension candidates. Maximal degree in co-relation 4157. Up to 742 conditions per place. [2023-11-06 22:01:53,882 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 131 selfloop transitions, 43 changer transitions 6/180 dead transitions. [2023-11-06 22:01:53,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 180 transitions, 1890 flow [2023-11-06 22:01:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:01:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:01:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1850 transitions. [2023-11-06 22:01:53,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544061302681992 [2023-11-06 22:01:53,891 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1850 transitions. [2023-11-06 22:01:53,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1850 transitions. [2023-11-06 22:01:53,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:53,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1850 transitions. [2023-11-06 22:01:53,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 102.77777777777777) internal successors, (1850), 18 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:53,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:53,907 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:53,908 INFO L175 Difference]: Start difference. First operand has 90 places, 130 transitions, 1200 flow. Second operand 18 states and 1850 transitions. [2023-11-06 22:01:53,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 180 transitions, 1890 flow [2023-11-06 22:01:53,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 180 transitions, 1841 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-11-06 22:01:53,928 INFO L231 Difference]: Finished difference. Result has 105 places, 143 transitions, 1424 flow [2023-11-06 22:01:53,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1424, PETRI_PLACES=105, PETRI_TRANSITIONS=143} [2023-11-06 22:01:53,929 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 84 predicate places. [2023-11-06 22:01:53,930 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 143 transitions, 1424 flow [2023-11-06 22:01:53,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 99.96296296296296) internal successors, (2699), 27 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:53,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:53,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:53,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:54,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:01:54,138 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:01:54,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:54,138 INFO L85 PathProgramCache]: Analyzing trace with hash -314150129, now seen corresponding path program 3 times [2023-11-06 22:01:54,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:54,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043677568] [2023-11-06 22:01:54,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:54,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:55,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:55,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043677568] [2023-11-06 22:01:55,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043677568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:55,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760091808] [2023-11-06 22:01:55,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:01:55,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:55,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:55,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:55,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:01:55,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:01:55,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:55,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:01:55,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:55,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:56,110 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:01:56,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-06 22:01:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:01:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760091808] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:56,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:56,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-11-06 22:01:56,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631813529] [2023-11-06 22:01:56,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:56,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:01:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:01:56,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:01:58,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 290 [2023-11-06 22:01:58,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 143 transitions, 1424 flow. Second operand has 27 states, 27 states have (on average 98.96296296296296) internal successors, (2672), 27 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:58,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:01:58,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 290 [2023-11-06 22:01:58,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:01:59,805 INFO L124 PetriNetUnfolderBase]: 464/882 cut-off events. [2023-11-06 22:01:59,806 INFO L125 PetriNetUnfolderBase]: For 2885/2885 co-relation queries the response was YES. [2023-11-06 22:01:59,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4445 conditions, 882 events. 464/882 cut-off events. For 2885/2885 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4414 event pairs, 127 based on Foata normal form. 2/778 useless extension candidates. Maximal degree in co-relation 4383. Up to 770 conditions per place. [2023-11-06 22:01:59,818 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 125 selfloop transitions, 41 changer transitions 15/181 dead transitions. [2023-11-06 22:01:59,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 181 transitions, 1983 flow [2023-11-06 22:01:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:01:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:01:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1829 transitions. [2023-11-06 22:01:59,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3503831417624521 [2023-11-06 22:01:59,825 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1829 transitions. [2023-11-06 22:01:59,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1829 transitions. [2023-11-06 22:01:59,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:01:59,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1829 transitions. [2023-11-06 22:01:59,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 101.61111111111111) internal successors, (1829), 18 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:59,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:59,840 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:59,840 INFO L175 Difference]: Start difference. First operand has 105 places, 143 transitions, 1424 flow. Second operand 18 states and 1829 transitions. [2023-11-06 22:01:59,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 181 transitions, 1983 flow [2023-11-06 22:01:59,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 1880 flow, removed 23 selfloop flow, removed 11 redundant places. [2023-11-06 22:01:59,878 INFO L231 Difference]: Finished difference. Result has 115 places, 145 transitions, 1443 flow [2023-11-06 22:01:59,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1443, PETRI_PLACES=115, PETRI_TRANSITIONS=145} [2023-11-06 22:01:59,879 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 94 predicate places. [2023-11-06 22:01:59,879 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 145 transitions, 1443 flow [2023-11-06 22:01:59,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 98.96296296296296) internal successors, (2672), 27 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:59,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:01:59,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:59,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:00,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:02:00,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:02:00,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:00,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1298460511, now seen corresponding path program 4 times [2023-11-06 22:02:00,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:00,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029250736] [2023-11-06 22:02:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:00,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:01,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:01,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029250736] [2023-11-06 22:02:01,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029250736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:01,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246984315] [2023-11-06 22:02:01,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:02:01,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:01,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:01,180 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:01,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:02:01,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:02:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:01,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:02:01,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:02:02,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:02,409 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:02,410 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 55 treesize of output 39 [2023-11-06 22:02:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:02:02,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246984315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:02,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:02,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2023-11-06 22:02:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438199320] [2023-11-06 22:02:02,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:03,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:02:03,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:03,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:02:03,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:02:04,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 290 [2023-11-06 22:02:04,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 145 transitions, 1443 flow. Second operand has 26 states, 26 states have (on average 100.0) internal successors, (2600), 26 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:04,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:04,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 290 [2023-11-06 22:02:04,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:05,997 INFO L124 PetriNetUnfolderBase]: 484/916 cut-off events. [2023-11-06 22:02:05,998 INFO L125 PetriNetUnfolderBase]: For 2749/2749 co-relation queries the response was YES. [2023-11-06 22:02:06,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4750 conditions, 916 events. 484/916 cut-off events. For 2749/2749 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4627 event pairs, 127 based on Foata normal form. 2/816 useless extension candidates. Maximal degree in co-relation 4684. Up to 822 conditions per place. [2023-11-06 22:02:06,009 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 157 selfloop transitions, 33 changer transitions 6/196 dead transitions. [2023-11-06 22:02:06,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 196 transitions, 2267 flow [2023-11-06 22:02:06,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:02:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:02:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1840 transitions. [2023-11-06 22:02:06,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524904214559387 [2023-11-06 22:02:06,014 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1840 transitions. [2023-11-06 22:02:06,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1840 transitions. [2023-11-06 22:02:06,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:06,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1840 transitions. [2023-11-06 22:02:06,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 102.22222222222223) internal successors, (1840), 18 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:06,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:06,028 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:06,028 INFO L175 Difference]: Start difference. First operand has 115 places, 145 transitions, 1443 flow. Second operand 18 states and 1840 transitions. [2023-11-06 22:02:06,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 196 transitions, 2267 flow [2023-11-06 22:02:06,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 196 transitions, 2149 flow, removed 8 selfloop flow, removed 15 redundant places. [2023-11-06 22:02:06,054 INFO L231 Difference]: Finished difference. Result has 121 places, 162 transitions, 1733 flow [2023-11-06 22:02:06,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1733, PETRI_PLACES=121, PETRI_TRANSITIONS=162} [2023-11-06 22:02:06,055 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 100 predicate places. [2023-11-06 22:02:06,055 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 162 transitions, 1733 flow [2023-11-06 22:02:06,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 100.0) internal successors, (2600), 26 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:06,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:06,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:06,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:06,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:02:06,263 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:02:06,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:06,263 INFO L85 PathProgramCache]: Analyzing trace with hash -557222053, now seen corresponding path program 5 times [2023-11-06 22:02:06,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:06,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756649326] [2023-11-06 22:02:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:06,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:07,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:07,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756649326] [2023-11-06 22:02:07,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756649326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:07,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222403074] [2023-11-06 22:02:07,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:02:07,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:07,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:07,157 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:07,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:02:07,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:02:07,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:07,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:02:07,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:02:07,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:08,171 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:08,171 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 55 treesize of output 39 [2023-11-06 22:02:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:02:08,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222403074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:08,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:08,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2023-11-06 22:02:08,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726577298] [2023-11-06 22:02:08,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:08,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:02:08,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:02:08,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:02:09,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 290 [2023-11-06 22:02:09,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 162 transitions, 1733 flow. Second operand has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:09,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:09,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 290 [2023-11-06 22:02:09,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:11,149 INFO L124 PetriNetUnfolderBase]: 491/939 cut-off events. [2023-11-06 22:02:11,150 INFO L125 PetriNetUnfolderBase]: For 3026/3026 co-relation queries the response was YES. [2023-11-06 22:02:11,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4877 conditions, 939 events. 491/939 cut-off events. For 3026/3026 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4827 event pairs, 132 based on Foata normal form. 2/835 useless extension candidates. Maximal degree in co-relation 4807. Up to 846 conditions per place. [2023-11-06 22:02:11,161 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 151 selfloop transitions, 31 changer transitions 18/200 dead transitions. [2023-11-06 22:02:11,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 200 transitions, 2328 flow [2023-11-06 22:02:11,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:02:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:02:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1919 transitions. [2023-11-06 22:02:11,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482758620689655 [2023-11-06 22:02:11,166 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1919 transitions. [2023-11-06 22:02:11,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1919 transitions. [2023-11-06 22:02:11,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:11,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1919 transitions. [2023-11-06 22:02:11,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 101.0) internal successors, (1919), 19 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:11,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:11,179 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:11,179 INFO L175 Difference]: Start difference. First operand has 121 places, 162 transitions, 1733 flow. Second operand 19 states and 1919 transitions. [2023-11-06 22:02:11,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 200 transitions, 2328 flow [2023-11-06 22:02:11,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 200 transitions, 2232 flow, removed 22 selfloop flow, removed 11 redundant places. [2023-11-06 22:02:11,208 INFO L231 Difference]: Finished difference. Result has 132 places, 164 transitions, 1743 flow [2023-11-06 22:02:11,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1743, PETRI_PLACES=132, PETRI_TRANSITIONS=164} [2023-11-06 22:02:11,210 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 111 predicate places. [2023-11-06 22:02:11,210 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 164 transitions, 1743 flow [2023-11-06 22:02:11,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:11,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:11,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:11,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:11,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:11,418 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:02:11,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:11,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1822364457, now seen corresponding path program 6 times [2023-11-06 22:02:11,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:11,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649408204] [2023-11-06 22:02:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:11,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:12,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:12,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649408204] [2023-11-06 22:02:12,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649408204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:12,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100328041] [2023-11-06 22:02:12,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:02:12,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:12,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:12,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:12,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:02:13,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:02:13,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:13,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 22:02:13,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:13,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:13,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:02:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:13,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:14,244 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:14,244 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 63 treesize of output 55 [2023-11-06 22:02:14,250 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 42 treesize of output 36 [2023-11-06 22:02:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:14,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100328041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:14,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:14,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-06 22:02:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126084792] [2023-11-06 22:02:14,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:14,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:02:14,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:02:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1077, Unknown=1, NotChecked=0, Total=1190 [2023-11-06 22:02:20,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 290 [2023-11-06 22:02:20,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 164 transitions, 1743 flow. Second operand has 35 states, 35 states have (on average 92.54285714285714) internal successors, (3239), 35 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:20,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:20,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 290 [2023-11-06 22:02:20,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:21,716 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_359 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_359) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) (.cse1 (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296)) (.cse2 (< c_~n~0 (+ c_~q_front~0 1))) (.cse3 (< c_~q_front~0 0))) (and (or (and .cse0 (= .cse1 (mod (+ c_~C~0 c_~x~0) 4294967296))) (< c_~n~0 (+ c_~q_back~0 1)) (< c_~q_back~0 0) .cse2 .cse3 (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) (or (and .cse0 (= (mod c_~x~0 4294967296) .cse1)) .cse2 .cse3))) is different from false [2023-11-06 22:02:23,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:02:25,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:02:29,451 INFO L124 PetriNetUnfolderBase]: 815/1554 cut-off events. [2023-11-06 22:02:29,452 INFO L125 PetriNetUnfolderBase]: For 5517/5517 co-relation queries the response was YES. [2023-11-06 22:02:29,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8072 conditions, 1554 events. 815/1554 cut-off events. For 5517/5517 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9278 event pairs, 74 based on Foata normal form. 4/1394 useless extension candidates. Maximal degree in co-relation 7988. Up to 870 conditions per place. [2023-11-06 22:02:29,474 INFO L140 encePairwiseOnDemand]: 276/290 looper letters, 196 selfloop transitions, 153 changer transitions 13/362 dead transitions. [2023-11-06 22:02:29,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 362 transitions, 4104 flow [2023-11-06 22:02:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:02:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:02:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2695 transitions. [2023-11-06 22:02:29,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33189655172413796 [2023-11-06 22:02:29,481 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2695 transitions. [2023-11-06 22:02:29,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2695 transitions. [2023-11-06 22:02:29,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:29,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2695 transitions. [2023-11-06 22:02:29,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 96.25) internal successors, (2695), 28 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:29,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 290.0) internal successors, (8410), 29 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:29,499 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 290.0) internal successors, (8410), 29 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:29,500 INFO L175 Difference]: Start difference. First operand has 132 places, 164 transitions, 1743 flow. Second operand 28 states and 2695 transitions. [2023-11-06 22:02:29,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 362 transitions, 4104 flow [2023-11-06 22:02:29,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 362 transitions, 4002 flow, removed 12 selfloop flow, removed 15 redundant places. [2023-11-06 22:02:29,548 INFO L231 Difference]: Finished difference. Result has 155 places, 273 transitions, 3471 flow [2023-11-06 22:02:29,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3471, PETRI_PLACES=155, PETRI_TRANSITIONS=273} [2023-11-06 22:02:29,549 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2023-11-06 22:02:29,549 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 273 transitions, 3471 flow [2023-11-06 22:02:29,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 92.54285714285714) internal successors, (3239), 35 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:29,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:29,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:29,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:29,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:29,756 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:02:29,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:29,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1473999057, now seen corresponding path program 7 times [2023-11-06 22:02:29,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:29,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970135179] [2023-11-06 22:02:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:29,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:31,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:31,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970135179] [2023-11-06 22:02:31,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970135179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:31,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180919326] [2023-11-06 22:02:31,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:02:31,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:31,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:31,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:31,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:02:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:31,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 22:02:31,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:31,742 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 22:02:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:32,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:32,867 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:32,868 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 63 treesize of output 55 [2023-11-06 22:02:32,877 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 42 treesize of output 36 [2023-11-06 22:02:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:33,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180919326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:33,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:33,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-06 22:02:33,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579686050] [2023-11-06 22:02:33,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:33,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:02:33,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:02:33,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1051, Unknown=3, NotChecked=0, Total=1190 [2023-11-06 22:02:35,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 290 [2023-11-06 22:02:35,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 273 transitions, 3471 flow. Second operand has 35 states, 35 states have (on average 82.54285714285714) internal successors, (2889), 35 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:35,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:35,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 290 [2023-11-06 22:02:35,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:38,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:02:43,738 INFO L124 PetriNetUnfolderBase]: 895/1715 cut-off events. [2023-11-06 22:02:43,738 INFO L125 PetriNetUnfolderBase]: For 11038/11038 co-relation queries the response was YES. [2023-11-06 22:02:43,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10878 conditions, 1715 events. 895/1715 cut-off events. For 11038/11038 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10441 event pairs, 80 based on Foata normal form. 3/1592 useless extension candidates. Maximal degree in co-relation 10766. Up to 1100 conditions per place. [2023-11-06 22:02:43,774 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 223 selfloop transitions, 176 changer transitions 11/410 dead transitions. [2023-11-06 22:02:43,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 410 transitions, 5429 flow [2023-11-06 22:02:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:02:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:02:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2504 transitions. [2023-11-06 22:02:43,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2977407847800238 [2023-11-06 22:02:43,781 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2504 transitions. [2023-11-06 22:02:43,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2504 transitions. [2023-11-06 22:02:43,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:43,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2504 transitions. [2023-11-06 22:02:43,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 86.34482758620689) internal successors, (2504), 29 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:43,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 290.0) internal successors, (8700), 30 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:43,797 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 290.0) internal successors, (8700), 30 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:43,798 INFO L175 Difference]: Start difference. First operand has 155 places, 273 transitions, 3471 flow. Second operand 29 states and 2504 transitions. [2023-11-06 22:02:43,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 410 transitions, 5429 flow [2023-11-06 22:02:43,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 410 transitions, 5130 flow, removed 127 selfloop flow, removed 11 redundant places. [2023-11-06 22:02:43,954 INFO L231 Difference]: Finished difference. Result has 178 places, 326 transitions, 4298 flow [2023-11-06 22:02:43,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4298, PETRI_PLACES=178, PETRI_TRANSITIONS=326} [2023-11-06 22:02:43,955 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2023-11-06 22:02:43,955 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 326 transitions, 4298 flow [2023-11-06 22:02:43,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 82.54285714285714) internal successors, (2889), 35 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:43,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:43,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:43,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:44,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:02:44,162 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:02:44,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:44,163 INFO L85 PathProgramCache]: Analyzing trace with hash 311216445, now seen corresponding path program 8 times [2023-11-06 22:02:44,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:44,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854032050] [2023-11-06 22:02:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:44,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:45,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:45,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854032050] [2023-11-06 22:02:45,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854032050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:45,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782404219] [2023-11-06 22:02:45,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:02:45,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:45,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:45,104 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:45,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:02:45,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:02:45,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:45,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:02:45,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:46,280 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-06 22:02:46,281 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2023-11-06 22:02:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:46,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:46,830 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:02:46,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-11-06 22:02:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:47,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782404219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:47,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:47,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-06 22:02:47,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260927314] [2023-11-06 22:02:47,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:47,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:02:47,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:02:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:02:51,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 290 [2023-11-06 22:02:51,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 326 transitions, 4298 flow. Second operand has 32 states, 32 states have (on average 97.6875) internal successors, (3126), 32 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 22:02:51,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:51,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 290 [2023-11-06 22:02:51,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:56,471 INFO L124 PetriNetUnfolderBase]: 989/1898 cut-off events. [2023-11-06 22:02:56,472 INFO L125 PetriNetUnfolderBase]: For 13526/13526 co-relation queries the response was YES. [2023-11-06 22:02:56,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12572 conditions, 1898 events. 989/1898 cut-off events. For 13526/13526 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11865 event pairs, 139 based on Foata normal form. 3/1767 useless extension candidates. Maximal degree in co-relation 12448. Up to 1354 conditions per place. [2023-11-06 22:02:56,491 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 279 selfloop transitions, 158 changer transitions 11/448 dead transitions. [2023-11-06 22:02:56,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 448 transitions, 6334 flow [2023-11-06 22:02:56,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:02:56,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:02:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2725 transitions. [2023-11-06 22:02:56,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34802043422733075 [2023-11-06 22:02:56,497 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2725 transitions. [2023-11-06 22:02:56,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2725 transitions. [2023-11-06 22:02:56,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:56,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2725 transitions. [2023-11-06 22:02:56,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 100.92592592592592) internal successors, (2725), 27 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:56,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 290.0) internal successors, (8120), 28 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:56,511 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 290.0) internal successors, (8120), 28 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:56,511 INFO L175 Difference]: Start difference. First operand has 178 places, 326 transitions, 4298 flow. Second operand 27 states and 2725 transitions. [2023-11-06 22:02:56,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 448 transitions, 6334 flow [2023-11-06 22:02:56,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 448 transitions, 6037 flow, removed 116 selfloop flow, removed 14 redundant places. [2023-11-06 22:02:56,626 INFO L231 Difference]: Finished difference. Result has 196 places, 373 transitions, 5256 flow [2023-11-06 22:02:56,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5256, PETRI_PLACES=196, PETRI_TRANSITIONS=373} [2023-11-06 22:02:56,627 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2023-11-06 22:02:56,627 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 373 transitions, 5256 flow [2023-11-06 22:02:56,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 97.6875) internal successors, (3126), 32 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 22:02:56,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:56,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:56,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:56,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:02:56,829 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:02:56,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:56,829 INFO L85 PathProgramCache]: Analyzing trace with hash 558027969, now seen corresponding path program 9 times [2023-11-06 22:02:56,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:56,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294226472] [2023-11-06 22:02:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:56,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:58,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:58,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294226472] [2023-11-06 22:02:58,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294226472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:58,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646813916] [2023-11-06 22:02:58,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:02:58,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:58,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:58,123 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:58,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:02:58,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:02:58,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:58,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 22:02:58,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:02:58,995 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 22:02:59,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-06 22:02:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:59,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:00,019 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:00,019 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 63 treesize of output 55 [2023-11-06 22:03:00,025 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 42 treesize of output 36 [2023-11-06 22:03:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:00,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646813916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:00,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:00,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-06 22:03:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601729252] [2023-11-06 22:03:00,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:00,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:03:00,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:00,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:03:00,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1045, Unknown=1, NotChecked=0, Total=1190 [2023-11-06 22:03:03,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:03:06,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 290 [2023-11-06 22:03:06,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 373 transitions, 5256 flow. Second operand has 35 states, 35 states have (on average 78.54285714285714) internal successors, (2749), 35 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:06,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:06,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 290 [2023-11-06 22:03:06,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:09,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:03:13,923 INFO L124 PetriNetUnfolderBase]: 1109/2153 cut-off events. [2023-11-06 22:03:13,923 INFO L125 PetriNetUnfolderBase]: For 16478/16478 co-relation queries the response was YES. [2023-11-06 22:03:13,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14533 conditions, 2153 events. 1109/2153 cut-off events. For 16478/16478 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14107 event pairs, 133 based on Foata normal form. 6/1991 useless extension candidates. Maximal degree in co-relation 14391. Up to 1214 conditions per place. [2023-11-06 22:03:13,943 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 269 selfloop transitions, 234 changer transitions 28/531 dead transitions. [2023-11-06 22:03:13,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 531 transitions, 7798 flow [2023-11-06 22:03:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:03:13,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:03:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2791 transitions. [2023-11-06 22:03:13,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28306288032454363 [2023-11-06 22:03:13,949 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2791 transitions. [2023-11-06 22:03:13,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2791 transitions. [2023-11-06 22:03:13,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:13,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2791 transitions. [2023-11-06 22:03:13,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 82.08823529411765) internal successors, (2791), 34 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:13,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 290.0) internal successors, (10150), 35 states have internal predecessors, (10150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:13,966 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 290.0) internal successors, (10150), 35 states have internal predecessors, (10150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:13,966 INFO L175 Difference]: Start difference. First operand has 196 places, 373 transitions, 5256 flow. Second operand 34 states and 2791 transitions. [2023-11-06 22:03:13,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 531 transitions, 7798 flow [2023-11-06 22:03:14,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 531 transitions, 7626 flow, removed 65 selfloop flow, removed 15 redundant places. [2023-11-06 22:03:14,161 INFO L231 Difference]: Finished difference. Result has 222 places, 424 transitions, 6629 flow [2023-11-06 22:03:14,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6629, PETRI_PLACES=222, PETRI_TRANSITIONS=424} [2023-11-06 22:03:14,162 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 201 predicate places. [2023-11-06 22:03:14,163 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 424 transitions, 6629 flow [2023-11-06 22:03:14,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 78.54285714285714) internal successors, (2749), 35 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:14,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:14,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:14,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:14,376 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:03:14,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1361539769, now seen corresponding path program 10 times [2023-11-06 22:03:14,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:14,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792284803] [2023-11-06 22:03:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:14,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:15,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:15,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792284803] [2023-11-06 22:03:15,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792284803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:15,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811562153] [2023-11-06 22:03:15,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:03:15,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:15,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:15,306 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:15,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:03:15,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:03:15,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:15,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:03:15,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:15,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-06 22:03:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:16,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:16,357 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:16,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-11-06 22:03:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:17,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811562153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:17,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:17,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-06 22:03:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867406138] [2023-11-06 22:03:17,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:17,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:03:17,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:17,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:03:17,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:03:19,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 290 [2023-11-06 22:03:19,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 424 transitions, 6629 flow. Second operand has 32 states, 32 states have (on average 96.6875) internal successors, (3094), 32 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:19,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:19,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 290 [2023-11-06 22:03:19,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:26,647 INFO L124 PetriNetUnfolderBase]: 1196/2334 cut-off events. [2023-11-06 22:03:26,647 INFO L125 PetriNetUnfolderBase]: For 22439/22439 co-relation queries the response was YES. [2023-11-06 22:03:26,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17066 conditions, 2334 events. 1196/2334 cut-off events. For 22439/22439 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15411 event pairs, 175 based on Foata normal form. 6/2218 useless extension candidates. Maximal degree in co-relation 16867. Up to 1724 conditions per place. [2023-11-06 22:03:26,672 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 367 selfloop transitions, 191 changer transitions 30/588 dead transitions. [2023-11-06 22:03:26,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 588 transitions, 9430 flow [2023-11-06 22:03:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:03:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:03:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3711 transitions. [2023-11-06 22:03:26,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34585274930102516 [2023-11-06 22:03:26,680 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3711 transitions. [2023-11-06 22:03:26,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3711 transitions. [2023-11-06 22:03:26,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:26,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3711 transitions. [2023-11-06 22:03:26,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 100.29729729729729) internal successors, (3711), 37 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:26,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 290.0) internal successors, (11020), 38 states have internal predecessors, (11020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:26,700 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 290.0) internal successors, (11020), 38 states have internal predecessors, (11020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:26,700 INFO L175 Difference]: Start difference. First operand has 222 places, 424 transitions, 6629 flow. Second operand 37 states and 3711 transitions. [2023-11-06 22:03:26,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 588 transitions, 9430 flow [2023-11-06 22:03:26,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 588 transitions, 8947 flow, removed 172 selfloop flow, removed 22 redundant places. [2023-11-06 22:03:26,962 INFO L231 Difference]: Finished difference. Result has 246 places, 474 transitions, 7697 flow [2023-11-06 22:03:26,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=6242, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7697, PETRI_PLACES=246, PETRI_TRANSITIONS=474} [2023-11-06 22:03:26,963 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-11-06 22:03:26,964 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 474 transitions, 7697 flow [2023-11-06 22:03:26,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 96.6875) internal successors, (3094), 32 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:26,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:26,964 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:26,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:27,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:27,171 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:03:27,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:27,171 INFO L85 PathProgramCache]: Analyzing trace with hash -46959539, now seen corresponding path program 11 times [2023-11-06 22:03:27,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:27,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965818288] [2023-11-06 22:03:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:27,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:28,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:28,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965818288] [2023-11-06 22:03:28,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965818288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:28,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205396769] [2023-11-06 22:03:28,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:03:28,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:28,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:28,577 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:28,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:03:29,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:03:29,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:29,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-06 22:03:29,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:29,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 22:03:29,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:03:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:29,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:30,453 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:30,453 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 122 treesize of output 98 [2023-11-06 22:03:30,459 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 85 treesize of output 79 [2023-11-06 22:03:30,463 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 79 treesize of output 67 [2023-11-06 22:03:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:03:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205396769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:30,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:30,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 32 [2023-11-06 22:03:30,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890761165] [2023-11-06 22:03:30,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:30,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:03:30,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:30,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:03:30,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1023, Unknown=1, NotChecked=0, Total=1122 [2023-11-06 22:03:31,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 290 [2023-11-06 22:03:31,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 474 transitions, 7697 flow. Second operand has 34 states, 34 states have (on average 78.61764705882354) internal successors, (2673), 34 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:31,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:31,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 290 [2023-11-06 22:03:31,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:34,174 INFO L124 PetriNetUnfolderBase]: 1267/2450 cut-off events. [2023-11-06 22:03:34,174 INFO L125 PetriNetUnfolderBase]: For 24398/24398 co-relation queries the response was YES. [2023-11-06 22:03:34,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18837 conditions, 2450 events. 1267/2450 cut-off events. For 24398/24398 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 16212 event pairs, 159 based on Foata normal form. 1/2351 useless extension candidates. Maximal degree in co-relation 18700. Up to 2010 conditions per place. [2023-11-06 22:03:34,207 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 407 selfloop transitions, 151 changer transitions 5/563 dead transitions. [2023-11-06 22:03:34,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 563 transitions, 10066 flow [2023-11-06 22:03:34,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:03:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:03:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1552 transitions. [2023-11-06 22:03:34,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28166969147005444 [2023-11-06 22:03:34,212 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1552 transitions. [2023-11-06 22:03:34,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1552 transitions. [2023-11-06 22:03:34,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:34,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1552 transitions. [2023-11-06 22:03:34,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 81.6842105263158) internal successors, (1552), 19 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:34,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:34,224 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:34,224 INFO L175 Difference]: Start difference. First operand has 246 places, 474 transitions, 7697 flow. Second operand 19 states and 1552 transitions. [2023-11-06 22:03:34,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 563 transitions, 10066 flow [2023-11-06 22:03:34,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 563 transitions, 9650 flow, removed 175 selfloop flow, removed 19 redundant places. [2023-11-06 22:03:34,630 INFO L231 Difference]: Finished difference. Result has 245 places, 514 transitions, 8593 flow [2023-11-06 22:03:34,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=7283, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8593, PETRI_PLACES=245, PETRI_TRANSITIONS=514} [2023-11-06 22:03:34,631 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2023-11-06 22:03:34,632 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 514 transitions, 8593 flow [2023-11-06 22:03:34,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 78.61764705882354) internal successors, (2673), 34 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:34,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:34,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:34,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:34,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:34,833 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:03:34,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:34,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2097167895, now seen corresponding path program 12 times [2023-11-06 22:03:34,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:34,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762291322] [2023-11-06 22:03:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:34,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:35,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:35,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762291322] [2023-11-06 22:03:35,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762291322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:35,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605559035] [2023-11-06 22:03:35,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:03:35,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:35,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:35,011 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:35,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:03:35,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:03:35,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:35,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:03:35,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:35,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:35,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605559035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:35,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:35,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2023-11-06 22:03:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269204261] [2023-11-06 22:03:35,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:35,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:03:35,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:03:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:03:36,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 290 [2023-11-06 22:03:36,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 514 transitions, 8593 flow. Second operand has 24 states, 24 states have (on average 120.08333333333333) internal successors, (2882), 24 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:36,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:36,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 290 [2023-11-06 22:03:36,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:37,157 INFO L124 PetriNetUnfolderBase]: 1188/2385 cut-off events. [2023-11-06 22:03:37,157 INFO L125 PetriNetUnfolderBase]: For 29762/29788 co-relation queries the response was YES. [2023-11-06 22:03:37,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18411 conditions, 2385 events. 1188/2385 cut-off events. For 29762/29788 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 16552 event pairs, 155 based on Foata normal form. 202/2475 useless extension candidates. Maximal degree in co-relation 18235. Up to 704 conditions per place. [2023-11-06 22:03:37,182 INFO L140 encePairwiseOnDemand]: 283/290 looper letters, 267 selfloop transitions, 77 changer transitions 201/553 dead transitions. [2023-11-06 22:03:37,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 553 transitions, 9961 flow [2023-11-06 22:03:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:03:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:03:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1481 transitions. [2023-11-06 22:03:37,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255747126436782 [2023-11-06 22:03:37,188 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1481 transitions. [2023-11-06 22:03:37,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1481 transitions. [2023-11-06 22:03:37,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:37,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1481 transitions. [2023-11-06 22:03:37,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 123.41666666666667) internal successors, (1481), 12 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:37,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:37,195 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:37,196 INFO L175 Difference]: Start difference. First operand has 245 places, 514 transitions, 8593 flow. Second operand 12 states and 1481 transitions. [2023-11-06 22:03:37,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 553 transitions, 9961 flow [2023-11-06 22:03:37,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 553 transitions, 9809 flow, removed 53 selfloop flow, removed 10 redundant places. [2023-11-06 22:03:37,428 INFO L231 Difference]: Finished difference. Result has 247 places, 314 transitions, 5550 flow [2023-11-06 22:03:37,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=8051, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5550, PETRI_PLACES=247, PETRI_TRANSITIONS=314} [2023-11-06 22:03:37,429 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 226 predicate places. [2023-11-06 22:03:37,430 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 314 transitions, 5550 flow [2023-11-06 22:03:37,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 120.08333333333333) internal successors, (2882), 24 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:37,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:37,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:37,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:37,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:37,631 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:03:37,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:37,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1788782068, now seen corresponding path program 13 times [2023-11-06 22:03:37,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:37,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893958176] [2023-11-06 22:03:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:37,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:37,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:37,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893958176] [2023-11-06 22:03:37,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893958176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:37,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61482921] [2023-11-06 22:03:37,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:03:37,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:37,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:37,793 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:37,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:03:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:37,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:03:37,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:38,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:38,150 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 22:03:38,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61482921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:38,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:38,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-06 22:03:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692567521] [2023-11-06 22:03:38,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:38,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:03:38,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:38,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:03:38,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:03:38,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 290 [2023-11-06 22:03:38,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 314 transitions, 5550 flow. Second operand has 18 states, 18 states have (on average 121.77777777777777) internal successors, (2192), 18 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:38,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:38,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 290 [2023-11-06 22:03:38,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:38,761 INFO L124 PetriNetUnfolderBase]: 404/817 cut-off events. [2023-11-06 22:03:38,762 INFO L125 PetriNetUnfolderBase]: For 13591/13615 co-relation queries the response was YES. [2023-11-06 22:03:38,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7635 conditions, 817 events. 404/817 cut-off events. For 13591/13615 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4258 event pairs, 134 based on Foata normal form. 68/851 useless extension candidates. Maximal degree in co-relation 7556. Up to 689 conditions per place. [2023-11-06 22:03:38,771 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 152 selfloop transitions, 4 changer transitions 49/211 dead transitions. [2023-11-06 22:03:38,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 211 transitions, 4386 flow [2023-11-06 22:03:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:03:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:03:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1000 transitions. [2023-11-06 22:03:38,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2023-11-06 22:03:38,773 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1000 transitions. [2023-11-06 22:03:38,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1000 transitions. [2023-11-06 22:03:38,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:38,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1000 transitions. [2023-11-06 22:03:38,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:38,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:38,777 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:38,778 INFO L175 Difference]: Start difference. First operand has 247 places, 314 transitions, 5550 flow. Second operand 8 states and 1000 transitions. [2023-11-06 22:03:38,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 211 transitions, 4386 flow [2023-11-06 22:03:38,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 211 transitions, 3581 flow, removed 92 selfloop flow, removed 44 redundant places. [2023-11-06 22:03:38,861 INFO L231 Difference]: Finished difference. Result has 166 places, 162 transitions, 2641 flow [2023-11-06 22:03:38,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3126, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2641, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2023-11-06 22:03:38,862 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-11-06 22:03:38,862 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 2641 flow [2023-11-06 22:03:38,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 121.77777777777777) internal successors, (2192), 18 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:38,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:38,863 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:38,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:39,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:39,064 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:03:39,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:39,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1526178379, now seen corresponding path program 14 times [2023-11-06 22:03:39,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:39,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450797157] [2023-11-06 22:03:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:39,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:03:39,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:39,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450797157] [2023-11-06 22:03:39,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450797157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:39,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858010163] [2023-11-06 22:03:39,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:03:39,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:39,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:39,172 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:39,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:03:39,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:03:39,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:39,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:03:39,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:03:39,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:03:39,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858010163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:39,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:39,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2023-11-06 22:03:39,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716354238] [2023-11-06 22:03:39,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:39,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:03:39,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:03:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:03:39,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-11-06 22:03:39,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 2641 flow. Second operand has 10 states, 10 states have (on average 131.2) internal successors, (1312), 10 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:39,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:39,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-11-06 22:03:39,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:39,845 INFO L124 PetriNetUnfolderBase]: 443/847 cut-off events. [2023-11-06 22:03:39,845 INFO L125 PetriNetUnfolderBase]: For 10916/10936 co-relation queries the response was YES. [2023-11-06 22:03:39,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6827 conditions, 847 events. 443/847 cut-off events. For 10916/10936 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4276 event pairs, 48 based on Foata normal form. 14/800 useless extension candidates. Maximal degree in co-relation 6770. Up to 307 conditions per place. [2023-11-06 22:03:39,853 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 63 selfloop transitions, 77 changer transitions 52/198 dead transitions. [2023-11-06 22:03:39,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 198 transitions, 3387 flow [2023-11-06 22:03:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:03:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:03:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 692 transitions. [2023-11-06 22:03:39,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772413793103448 [2023-11-06 22:03:39,855 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 692 transitions. [2023-11-06 22:03:39,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 692 transitions. [2023-11-06 22:03:39,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:39,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 692 transitions. [2023-11-06 22:03:39,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:39,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:39,859 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:39,859 INFO L175 Difference]: Start difference. First operand has 166 places, 162 transitions, 2641 flow. Second operand 5 states and 692 transitions. [2023-11-06 22:03:39,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 198 transitions, 3387 flow [2023-11-06 22:03:39,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 198 transitions, 3159 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-11-06 22:03:39,905 INFO L231 Difference]: Finished difference. Result has 130 places, 125 transitions, 2005 flow [2023-11-06 22:03:39,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2005, PETRI_PLACES=130, PETRI_TRANSITIONS=125} [2023-11-06 22:03:39,906 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2023-11-06 22:03:39,906 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 125 transitions, 2005 flow [2023-11-06 22:03:39,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.2) internal successors, (1312), 10 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:39,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:39,906 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:39,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:40,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:40,107 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:03:40,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1496779196, now seen corresponding path program 15 times [2023-11-06 22:03:40,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267619569] [2023-11-06 22:03:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:40,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:40,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267619569] [2023-11-06 22:03:40,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267619569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:40,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220550220] [2023-11-06 22:03:40,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:03:40,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:40,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:40,766 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:40,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:03:41,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:03:41,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:41,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:03:41,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:03:41,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:41,325 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:03:41,325 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 26 treesize of output 14 [2023-11-06 22:03:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:03:41,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220550220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:41,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:41,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2023-11-06 22:03:41,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720622779] [2023-11-06 22:03:41,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:41,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:03:41,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:41,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:03:41,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:03:42,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 290 [2023-11-06 22:03:42,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 125 transitions, 2005 flow. Second operand has 17 states, 17 states have (on average 116.41176470588235) internal successors, (1979), 17 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:42,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:42,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 290 [2023-11-06 22:03:42,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:43,909 INFO L124 PetriNetUnfolderBase]: 644/1208 cut-off events. [2023-11-06 22:03:43,910 INFO L125 PetriNetUnfolderBase]: For 23482/23507 co-relation queries the response was YES. [2023-11-06 22:03:43,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9930 conditions, 1208 events. 644/1208 cut-off events. For 23482/23507 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6390 event pairs, 79 based on Foata normal form. 77/1116 useless extension candidates. Maximal degree in co-relation 9877. Up to 587 conditions per place. [2023-11-06 22:03:43,919 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 183 selfloop transitions, 148 changer transitions 3/340 dead transitions. [2023-11-06 22:03:43,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 340 transitions, 5189 flow [2023-11-06 22:03:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:03:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 22:03:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3642 transitions. [2023-11-06 22:03:43,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186206896551724 [2023-11-06 22:03:43,926 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3642 transitions. [2023-11-06 22:03:43,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3642 transitions. [2023-11-06 22:03:43,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:43,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3642 transitions. [2023-11-06 22:03:43,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 121.4) internal successors, (3642), 30 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:43,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 290.0) internal successors, (8990), 31 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:43,943 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 290.0) internal successors, (8990), 31 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:43,943 INFO L175 Difference]: Start difference. First operand has 130 places, 125 transitions, 2005 flow. Second operand 30 states and 3642 transitions. [2023-11-06 22:03:43,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 340 transitions, 5189 flow [2023-11-06 22:03:44,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 340 transitions, 4076 flow, removed 521 selfloop flow, removed 13 redundant places. [2023-11-06 22:03:44,045 INFO L231 Difference]: Finished difference. Result has 140 places, 206 transitions, 3127 flow [2023-11-06 22:03:44,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1787, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3127, PETRI_PLACES=140, PETRI_TRANSITIONS=206} [2023-11-06 22:03:44,046 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2023-11-06 22:03:44,046 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 206 transitions, 3127 flow [2023-11-06 22:03:44,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 116.41176470588235) internal successors, (1979), 17 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:44,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:44,047 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:44,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:44,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:03:44,258 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:03:44,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:44,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2087243022, now seen corresponding path program 16 times [2023-11-06 22:03:44,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:44,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279100596] [2023-11-06 22:03:44,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:44,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:45,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:45,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279100596] [2023-11-06 22:03:45,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279100596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:45,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80398132] [2023-11-06 22:03:45,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:03:45,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:45,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:45,285 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:45,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:03:45,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:03:45,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:45,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:03:45,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:45,462 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 39 treesize of output 37 [2023-11-06 22:03:45,899 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:03:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:46,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:46,184 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_664 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_664) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-11-06 22:03:46,271 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:46,271 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 40 [2023-11-06 22:03:46,276 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 25 treesize of output 18 [2023-11-06 22:03:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:46,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80398132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:46,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:46,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-06 22:03:46,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854798154] [2023-11-06 22:03:46,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:46,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:03:46,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:46,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:03:46,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=819, Unknown=1, NotChecked=58, Total=992 [2023-11-06 22:03:46,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 290 [2023-11-06 22:03:46,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 206 transitions, 3127 flow. Second operand has 32 states, 32 states have (on average 98.65625) internal successors, (3157), 32 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:46,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:46,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 290 [2023-11-06 22:03:46,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:51,666 INFO L124 PetriNetUnfolderBase]: 1127/2099 cut-off events. [2023-11-06 22:03:51,667 INFO L125 PetriNetUnfolderBase]: For 16746/16771 co-relation queries the response was YES. [2023-11-06 22:03:51,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14679 conditions, 2099 events. 1127/2099 cut-off events. For 16746/16771 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12136 event pairs, 106 based on Foata normal form. 80/2038 useless extension candidates. Maximal degree in co-relation 14626. Up to 1198 conditions per place. [2023-11-06 22:03:51,686 INFO L140 encePairwiseOnDemand]: 281/290 looper letters, 237 selfloop transitions, 263 changer transitions 1/507 dead transitions. [2023-11-06 22:03:51,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 507 transitions, 7464 flow [2023-11-06 22:03:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:03:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:03:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3507 transitions. [2023-11-06 22:03:51,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3556795131845842 [2023-11-06 22:03:51,692 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3507 transitions. [2023-11-06 22:03:51,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3507 transitions. [2023-11-06 22:03:51,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:51,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3507 transitions. [2023-11-06 22:03:51,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 103.1470588235294) internal successors, (3507), 34 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:51,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 290.0) internal successors, (10150), 35 states have internal predecessors, (10150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:51,751 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 290.0) internal successors, (10150), 35 states have internal predecessors, (10150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:51,751 INFO L175 Difference]: Start difference. First operand has 140 places, 206 transitions, 3127 flow. Second operand 34 states and 3507 transitions. [2023-11-06 22:03:51,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 507 transitions, 7464 flow [2023-11-06 22:03:51,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 507 transitions, 6303 flow, removed 465 selfloop flow, removed 9 redundant places. [2023-11-06 22:03:51,817 INFO L231 Difference]: Finished difference. Result has 176 places, 405 transitions, 5558 flow [2023-11-06 22:03:51,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5558, PETRI_PLACES=176, PETRI_TRANSITIONS=405} [2023-11-06 22:03:51,818 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-11-06 22:03:51,818 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 405 transitions, 5558 flow [2023-11-06 22:03:51,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.65625) internal successors, (3157), 32 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:51,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:51,819 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:51,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-06 22:03:52,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:03:52,019 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:03:52,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1174251468, now seen corresponding path program 17 times [2023-11-06 22:03:52,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:52,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214554308] [2023-11-06 22:03:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:52,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:52,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:52,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214554308] [2023-11-06 22:03:52,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214554308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:52,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95615562] [2023-11-06 22:03:52,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:03:52,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:52,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:52,934 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:52,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:03:53,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:03:53,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:53,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:03:53,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:53,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:53,256 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:03:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:03:53,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:53,601 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:53,602 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 45 treesize of output 37 [2023-11-06 22:03:53,608 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 24 treesize of output 18 [2023-11-06 22:03:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:03:53,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95615562] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:53,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:53,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2023-11-06 22:03:53,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10996418] [2023-11-06 22:03:53,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:53,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:03:53,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:53,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:03:53,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:03:54,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-11-06 22:03:54,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 405 transitions, 5558 flow. Second operand has 23 states, 23 states have (on average 111.91304347826087) internal successors, (2574), 23 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:54,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:54,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-11-06 22:03:54,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:57,905 INFO L124 PetriNetUnfolderBase]: 1069/1907 cut-off events. [2023-11-06 22:03:57,905 INFO L125 PetriNetUnfolderBase]: For 25266/25291 co-relation queries the response was YES. [2023-11-06 22:03:57,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15091 conditions, 1907 events. 1069/1907 cut-off events. For 25266/25291 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10467 event pairs, 45 based on Foata normal form. 109/1965 useless extension candidates. Maximal degree in co-relation 15028. Up to 839 conditions per place. [2023-11-06 22:03:57,923 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 196 selfloop transitions, 355 changer transitions 3/560 dead transitions. [2023-11-06 22:03:57,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 560 transitions, 8442 flow [2023-11-06 22:03:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:03:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:03:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3931 transitions. [2023-11-06 22:03:57,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3986815415821501 [2023-11-06 22:03:57,928 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3931 transitions. [2023-11-06 22:03:57,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3931 transitions. [2023-11-06 22:03:57,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:57,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3931 transitions. [2023-11-06 22:03:57,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 115.61764705882354) internal successors, (3931), 34 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:57,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 290.0) internal successors, (10150), 35 states have internal predecessors, (10150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:57,946 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 290.0) internal successors, (10150), 35 states have internal predecessors, (10150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:57,947 INFO L175 Difference]: Start difference. First operand has 176 places, 405 transitions, 5558 flow. Second operand 34 states and 3931 transitions. [2023-11-06 22:03:57,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 560 transitions, 8442 flow [2023-11-06 22:03:58,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 560 transitions, 7513 flow, removed 450 selfloop flow, removed 6 redundant places. [2023-11-06 22:03:58,076 INFO L231 Difference]: Finished difference. Result has 212 places, 443 transitions, 6106 flow [2023-11-06 22:03:58,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=4404, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6106, PETRI_PLACES=212, PETRI_TRANSITIONS=443} [2023-11-06 22:03:58,077 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 191 predicate places. [2023-11-06 22:03:58,077 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 443 transitions, 6106 flow [2023-11-06 22:03:58,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 111.91304347826087) internal successors, (2574), 23 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:58,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:58,078 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:58,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:58,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:03:58,278 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:03:58,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:58,279 INFO L85 PathProgramCache]: Analyzing trace with hash -430901886, now seen corresponding path program 18 times [2023-11-06 22:03:58,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:58,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319891226] [2023-11-06 22:03:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:58,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:59,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:59,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319891226] [2023-11-06 22:03:59,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319891226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:59,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287661182] [2023-11-06 22:03:59,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:03:59,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:59,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:59,693 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:59,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:04:00,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:04:00,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:00,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-06 22:04:00,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:01,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:01,247 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:04:01,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 22 [2023-11-06 22:04:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:01,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:02,583 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:04:02,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 93 [2023-11-06 22:04:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:04,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287661182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:04,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:04,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-06 22:04:04,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026810410] [2023-11-06 22:04:04,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:04,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:04:04,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:04:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:04:10,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 290 [2023-11-06 22:04:10,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 443 transitions, 6106 flow. Second operand has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:10,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:10,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 290 [2023-11-06 22:04:10,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:17,777 INFO L124 PetriNetUnfolderBase]: 1162/2080 cut-off events. [2023-11-06 22:04:17,777 INFO L125 PetriNetUnfolderBase]: For 28816/28816 co-relation queries the response was YES. [2023-11-06 22:04:17,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16903 conditions, 2080 events. 1162/2080 cut-off events. For 28816/28816 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11407 event pairs, 200 based on Foata normal form. 2/2054 useless extension candidates. Maximal degree in co-relation 16830. Up to 1840 conditions per place. [2023-11-06 22:04:17,799 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 445 selfloop transitions, 80 changer transitions 26/551 dead transitions. [2023-11-06 22:04:17,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 551 transitions, 8543 flow [2023-11-06 22:04:17,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:04:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:04:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2623 transitions. [2023-11-06 22:04:17,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34787798408488063 [2023-11-06 22:04:17,805 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2623 transitions. [2023-11-06 22:04:17,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2623 transitions. [2023-11-06 22:04:17,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:17,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2623 transitions. [2023-11-06 22:04:17,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 100.88461538461539) internal successors, (2623), 26 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:17,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 290.0) internal successors, (7830), 27 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:17,817 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 290.0) internal successors, (7830), 27 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:17,818 INFO L175 Difference]: Start difference. First operand has 212 places, 443 transitions, 6106 flow. Second operand 26 states and 2623 transitions. [2023-11-06 22:04:17,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 551 transitions, 8543 flow [2023-11-06 22:04:18,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 551 transitions, 7900 flow, removed 266 selfloop flow, removed 9 redundant places. [2023-11-06 22:04:18,011 INFO L231 Difference]: Finished difference. Result has 241 places, 489 transitions, 6479 flow [2023-11-06 22:04:18,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=5559, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6479, PETRI_PLACES=241, PETRI_TRANSITIONS=489} [2023-11-06 22:04:18,012 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 220 predicate places. [2023-11-06 22:04:18,012 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 489 transitions, 6479 flow [2023-11-06 22:04:18,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 97.53658536585365) internal successors, (3999), 41 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:18,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:18,013 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:18,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:18,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:04:18,219 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:04:18,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash 678295058, now seen corresponding path program 19 times [2023-11-06 22:04:18,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:18,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82207905] [2023-11-06 22:04:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:18,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:19,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:19,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82207905] [2023-11-06 22:04:19,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82207905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:19,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441967031] [2023-11-06 22:04:19,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:04:19,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:19,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:19,452 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:19,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:04:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:19,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:04:19,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:19,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 22:04:19,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-06 22:04:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:04:19,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:20,014 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:04:20,015 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 40 [2023-11-06 22:04:20,020 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 25 treesize of output 18 [2023-11-06 22:04:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:04:20,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441967031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:20,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:20,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2023-11-06 22:04:20,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754363556] [2023-11-06 22:04:20,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:20,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:04:20,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:20,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:04:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=441, Unknown=2, NotChecked=0, Total=506 [2023-11-06 22:04:21,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 290 [2023-11-06 22:04:21,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 489 transitions, 6479 flow. Second operand has 23 states, 23 states have (on average 99.04347826086956) internal successors, (2278), 23 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 22:04:21,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:21,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 290 [2023-11-06 22:04:21,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:22,946 INFO L124 PetriNetUnfolderBase]: 1474/2567 cut-off events. [2023-11-06 22:04:22,946 INFO L125 PetriNetUnfolderBase]: For 36974/37001 co-relation queries the response was YES. [2023-11-06 22:04:22,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20579 conditions, 2567 events. 1474/2567 cut-off events. For 36974/37001 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14534 event pairs, 138 based on Foata normal form. 25/2589 useless extension candidates. Maximal degree in co-relation 20493. Up to 1053 conditions per place. [2023-11-06 22:04:22,970 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 433 selfloop transitions, 219 changer transitions 1/659 dead transitions. [2023-11-06 22:04:22,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 659 transitions, 10087 flow [2023-11-06 22:04:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:04:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:04:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1738 transitions. [2023-11-06 22:04:22,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35253549695740366 [2023-11-06 22:04:22,973 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1738 transitions. [2023-11-06 22:04:22,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1738 transitions. [2023-11-06 22:04:22,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:22,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1738 transitions. [2023-11-06 22:04:22,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 102.23529411764706) internal successors, (1738), 17 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:22,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:22,978 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:22,978 INFO L175 Difference]: Start difference. First operand has 241 places, 489 transitions, 6479 flow. Second operand 17 states and 1738 transitions. [2023-11-06 22:04:22,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 659 transitions, 10087 flow [2023-11-06 22:04:23,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 659 transitions, 9936 flow, removed 60 selfloop flow, removed 13 redundant places. [2023-11-06 22:04:23,167 INFO L231 Difference]: Finished difference. Result has 241 places, 540 transitions, 7803 flow [2023-11-06 22:04:23,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=6332, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7803, PETRI_PLACES=241, PETRI_TRANSITIONS=540} [2023-11-06 22:04:23,169 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 220 predicate places. [2023-11-06 22:04:23,169 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 540 transitions, 7803 flow [2023-11-06 22:04:23,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 99.04347826086956) internal successors, (2278), 23 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 22:04:23,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:23,170 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:23,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:23,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:04:23,372 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:04:23,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash 331913114, now seen corresponding path program 20 times [2023-11-06 22:04:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:23,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356603227] [2023-11-06 22:04:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:23,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:25,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356603227] [2023-11-06 22:04:25,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356603227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:25,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930959044] [2023-11-06 22:04:25,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:04:25,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:25,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:25,153 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:25,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:04:25,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:04:25,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:25,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-06 22:04:25,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:26,609 INFO L322 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-11-06 22:04:26,609 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 37 treesize of output 22 [2023-11-06 22:04:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:26,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:27,940 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:04:27,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 93 [2023-11-06 22:04:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:29,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930959044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:29,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:29,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-11-06 22:04:29,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693254318] [2023-11-06 22:04:29,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:29,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-06 22:04:29,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-06 22:04:29,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:04:31,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:04:37,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 290 [2023-11-06 22:04:37,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 540 transitions, 7803 flow. Second operand has 42 states, 42 states have (on average 90.5) internal successors, (3801), 42 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:37,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:37,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 290 [2023-11-06 22:04:37,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:40,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:04:47,492 INFO L124 PetriNetUnfolderBase]: 1551/2739 cut-off events. [2023-11-06 22:04:47,492 INFO L125 PetriNetUnfolderBase]: For 41438/41438 co-relation queries the response was YES. [2023-11-06 22:04:47,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22445 conditions, 2739 events. 1551/2739 cut-off events. For 41438/41438 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15989 event pairs, 267 based on Foata normal form. 3/2742 useless extension candidates. Maximal degree in co-relation 22362. Up to 2395 conditions per place. [2023-11-06 22:04:47,521 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 511 selfloop transitions, 96 changer transitions 35/642 dead transitions. [2023-11-06 22:04:47,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 642 transitions, 10144 flow [2023-11-06 22:04:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:04:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 22:04:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2823 transitions. [2023-11-06 22:04:47,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32448275862068965 [2023-11-06 22:04:47,526 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2823 transitions. [2023-11-06 22:04:47,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2823 transitions. [2023-11-06 22:04:47,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:47,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2823 transitions. [2023-11-06 22:04:47,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 94.1) internal successors, (2823), 30 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:47,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 290.0) internal successors, (8990), 31 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:47,540 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 290.0) internal successors, (8990), 31 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:47,540 INFO L175 Difference]: Start difference. First operand has 241 places, 540 transitions, 7803 flow. Second operand 30 states and 2823 transitions. [2023-11-06 22:04:47,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 642 transitions, 10144 flow [2023-11-06 22:04:47,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 642 transitions, 10062 flow, removed 33 selfloop flow, removed 6 redundant places. [2023-11-06 22:04:47,834 INFO L231 Difference]: Finished difference. Result has 276 places, 553 transitions, 8169 flow [2023-11-06 22:04:47,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=7721, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8169, PETRI_PLACES=276, PETRI_TRANSITIONS=553} [2023-11-06 22:04:47,835 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2023-11-06 22:04:47,835 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 553 transitions, 8169 flow [2023-11-06 22:04:47,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 90.5) internal successors, (3801), 42 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:47,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:47,836 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:47,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:48,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:48,042 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:04:48,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash -238503682, now seen corresponding path program 21 times [2023-11-06 22:04:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:48,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044482653] [2023-11-06 22:04:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:48,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:49,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:49,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044482653] [2023-11-06 22:04:49,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044482653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:49,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116012814] [2023-11-06 22:04:49,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:04:49,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:49,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:49,389 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:49,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d814d6-1602-4548-9e97-11dd4d77c8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:04:49,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:04:49,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:49,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 22:04:49,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:04:50,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:50,972 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:04:50,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 71 [2023-11-06 22:04:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:04:51,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116012814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:51,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:51,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-11-06 22:04:51,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073369386] [2023-11-06 22:04:51,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:51,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:04:51,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:04:51,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056