./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:06:35,498 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:06:35,571 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:06:35,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:06:35,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:06:35,603 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:06:35,604 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:06:35,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:06:35,605 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:06:35,606 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:06:35,607 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:06:35,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:06:35,608 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:06:35,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:06:35,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:06:35,610 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:06:35,610 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:06:35,611 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:06:35,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:06:35,612 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:06:35,612 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:06:35,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:06:35,613 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:06:35,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:06:35,614 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:06:35,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:06:35,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:06:35,616 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:06:35,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:06:35,616 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:06:35,617 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:06:35,617 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:06:35,617 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:06:35,618 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:06:35,618 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:06:35,618 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:06:35,618 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:06:35,619 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:06:35,619 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:06:35,619 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_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2023-11-12 02:06:35,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:06:35,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:06:35,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:06:35,969 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:06:35,969 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:06:35,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-12 02:06:38,958 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:06:39,222 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:06:39,223 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-12 02:06:39,230 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/data/e089ba7c1/2e87422803c144bea6cd4df1fda8a7e2/FLAG2b696023a [2023-11-12 02:06:39,242 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/data/e089ba7c1/2e87422803c144bea6cd4df1fda8a7e2 [2023-11-12 02:06:39,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:06:39,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:06:39,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:06:39,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:06:39,253 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:06:39,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ebcfc47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39, skipping insertion in model container [2023-11-12 02:06:39,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,279 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:06:39,450 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_aadd5c17-c81b-4ddf-ba2d-2316a6435944/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2023-11-12 02:06:39,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:06:39,469 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:06:39,491 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_aadd5c17-c81b-4ddf-ba2d-2316a6435944/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2023-11-12 02:06:39,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:06:39,503 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:06:39,504 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:06:39,512 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:06:39,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39 WrapperNode [2023-11-12 02:06:39,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:06:39,514 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:06:39,514 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:06:39,514 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:06:39,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,531 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,571 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 203 [2023-11-12 02:06:39,578 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:06:39,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:06:39,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:06:39,581 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:06:39,590 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,595 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,604 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,609 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,617 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:06:39,618 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:06:39,618 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:06:39,618 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:06:39,619 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:06:39,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:39,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:06:39,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:06:39,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:06:39,730 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:06:39,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:06:39,730 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:06:39,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:06:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:06:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:06:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:06:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:06:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:06:39,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:06:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:06:39,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:06:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:06:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:06:39,737 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:06:39,923 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:06:39,927 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:06:40,482 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:06:40,644 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:06:40,645 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:06:40,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:06:40 BoogieIcfgContainer [2023-11-12 02:06:40,648 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:06:40,650 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:06:40,650 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:06:40,654 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:06:40,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:06:39" (1/3) ... [2023-11-12 02:06:40,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6e3418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:06:40, skipping insertion in model container [2023-11-12 02:06:40,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39" (2/3) ... [2023-11-12 02:06:40,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6e3418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:06:40, skipping insertion in model container [2023-11-12 02:06:40,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:06:40" (3/3) ... [2023-11-12 02:06:40,658 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-11-12 02:06:40,668 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:06:40,680 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:06:40,680 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:06:40,681 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:06:40,783 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:06:40,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 172 transitions, 358 flow [2023-11-12 02:06:40,928 INFO L124 PetriNetUnfolderBase]: 13/170 cut-off events. [2023-11-12 02:06:40,928 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:06:40,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 170 events. 13/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 96 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-11-12 02:06:40,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 172 transitions, 358 flow [2023-11-12 02:06:40,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 161 transitions, 334 flow [2023-11-12 02:06:40,949 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:06:40,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 161 transitions, 334 flow [2023-11-12 02:06:40,962 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 161 transitions, 334 flow [2023-11-12 02:06:40,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 161 transitions, 334 flow [2023-11-12 02:06:41,012 INFO L124 PetriNetUnfolderBase]: 13/161 cut-off events. [2023-11-12 02:06:41,013 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:06:41,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 13/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-11-12 02:06:41,016 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-12 02:06:47,345 INFO L134 LiptonReduction]: Checked pairs total: 686 [2023-11-12 02:06:47,345 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-11-12 02:06:47,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:06:47,373 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=LoopHeads, 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;@3ca7f98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:06:47,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:06:47,384 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:06:47,385 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2023-11-12 02:06:47,385 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:06:47,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:47,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:47,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:47,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:47,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1582727318, now seen corresponding path program 1 times [2023-11-12 02:06:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:47,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151502038] [2023-11-12 02:06:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:47,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:06:47,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:47,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151502038] [2023-11-12 02:06:47,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151502038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:47,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:47,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:06:47,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891393438] [2023-11-12 02:06:47,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:06:47,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:06:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:06:47,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 336 [2023-11-12 02:06:47,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:47,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:47,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 336 [2023-11-12 02:06:47,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:47,989 INFO L124 PetriNetUnfolderBase]: 76/138 cut-off events. [2023-11-12 02:06:47,990 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-12 02:06:47,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 138 events. 76/138 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 359 event pairs, 24 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-12 02:06:47,995 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-11-12 02:06:47,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 31 transitions, 145 flow [2023-11-12 02:06:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:06:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:06:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2023-11-12 02:06:48,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2023-11-12 02:06:48,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2023-11-12 02:06:48,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2023-11-12 02:06:48,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:48,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2023-11-12 02:06:48,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:48,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:48,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:48,051 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 497 transitions. [2023-11-12 02:06:48,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 31 transitions, 145 flow [2023-11-12 02:06:48,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:06:48,056 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2023-11-12 02:06:48,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2023-11-12 02:06:48,065 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-12 02:06:48,065 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2023-11-12 02:06:48,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:48,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:48,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:48,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:06:48,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:48,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:48,069 INFO L85 PathProgramCache]: Analyzing trace with hash -407870521, now seen corresponding path program 1 times [2023-11-12 02:06:48,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:48,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374940251] [2023-11-12 02:06:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:48,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:06:48,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:48,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374940251] [2023-11-12 02:06:48,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374940251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:48,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:48,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:06:48,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837946516] [2023-11-12 02:06:48,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:48,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:48,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:48,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 336 [2023-11-12 02:06:48,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:48,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:48,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 336 [2023-11-12 02:06:48,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:48,543 INFO L124 PetriNetUnfolderBase]: 95/175 cut-off events. [2023-11-12 02:06:48,543 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-12 02:06:48,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 175 events. 95/175 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 541 event pairs, 26 based on Foata normal form. 4/177 useless extension candidates. Maximal degree in co-relation 136. Up to 88 conditions per place. [2023-11-12 02:06:48,545 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 34 selfloop transitions, 4 changer transitions 7/45 dead transitions. [2023-11-12 02:06:48,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 45 transitions, 218 flow [2023-11-12 02:06:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:48,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 772 transitions. [2023-11-12 02:06:48,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2023-11-12 02:06:48,549 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 772 transitions. [2023-11-12 02:06:48,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 772 transitions. [2023-11-12 02:06:48,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:48,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 772 transitions. [2023-11-12 02:06:48,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.4) internal successors, (772), 5 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:48,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:48,560 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:48,560 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 5 states and 772 transitions. [2023-11-12 02:06:48,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 45 transitions, 218 flow [2023-11-12 02:06:48,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 45 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:06:48,562 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 87 flow [2023-11-12 02:06:48,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-11-12 02:06:48,564 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-11-12 02:06:48,564 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 87 flow [2023-11-12 02:06:48,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:48,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:48,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:48,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:06:48,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:48,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:48,566 INFO L85 PathProgramCache]: Analyzing trace with hash -520697523, now seen corresponding path program 2 times [2023-11-12 02:06:48,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:48,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714219192] [2023-11-12 02:06:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:48,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:06:48,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:48,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714219192] [2023-11-12 02:06:48,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714219192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:06:48,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452260634] [2023-11-12 02:06:48,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:06:48,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:48,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:06:48,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:06:48,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:06:48,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:06:48,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:06:48,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:06:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:06:48,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:06:48,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452260634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:48,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:06:48,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-12 02:06:48,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906916082] [2023-11-12 02:06:48,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:48,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:06:48,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:48,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:06:48,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:06:49,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 336 [2023-11-12 02:06:49,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:49,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 336 [2023-11-12 02:06:49,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:49,169 INFO L124 PetriNetUnfolderBase]: 110/221 cut-off events. [2023-11-12 02:06:49,169 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2023-11-12 02:06:49,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 221 events. 110/221 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 692 event pairs, 80 based on Foata normal form. 16/232 useless extension candidates. Maximal degree in co-relation 341. Up to 165 conditions per place. [2023-11-12 02:06:49,173 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 22 selfloop transitions, 2 changer transitions 16/40 dead transitions. [2023-11-12 02:06:49,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 40 transitions, 216 flow [2023-11-12 02:06:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:49,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 748 transitions. [2023-11-12 02:06:49,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2023-11-12 02:06:49,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 748 transitions. [2023-11-12 02:06:49,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 748 transitions. [2023-11-12 02:06:49,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:49,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 748 transitions. [2023-11-12 02:06:49,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,187 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 87 flow. Second operand 5 states and 748 transitions. [2023-11-12 02:06:49,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 40 transitions, 216 flow [2023-11-12 02:06:49,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 202 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-12 02:06:49,191 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 96 flow [2023-11-12 02:06:49,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-12 02:06:49,192 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2023-11-12 02:06:49,192 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 96 flow [2023-11-12 02:06:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:49,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:49,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:06:49,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:49,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:49,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:49,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1492588785, now seen corresponding path program 1 times [2023-11-12 02:06:49,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:49,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503462463] [2023-11-12 02:06:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:49,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:06:49,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:49,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503462463] [2023-11-12 02:06:49,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503462463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:49,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:49,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:06:49,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224094048] [2023-11-12 02:06:49,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:49,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:49,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:49,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:49,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:49,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 336 [2023-11-12 02:06:49,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:49,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 336 [2023-11-12 02:06:49,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:49,780 INFO L124 PetriNetUnfolderBase]: 98/181 cut-off events. [2023-11-12 02:06:49,780 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-11-12 02:06:49,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 181 events. 98/181 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 526 event pairs, 45 based on Foata normal form. 4/183 useless extension candidates. Maximal degree in co-relation 502. Up to 143 conditions per place. [2023-11-12 02:06:49,784 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 27 selfloop transitions, 8 changer transitions 5/40 dead transitions. [2023-11-12 02:06:49,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 230 flow [2023-11-12 02:06:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 762 transitions. [2023-11-12 02:06:49,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2023-11-12 02:06:49,788 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 762 transitions. [2023-11-12 02:06:49,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 762 transitions. [2023-11-12 02:06:49,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:49,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 762 transitions. [2023-11-12 02:06:49,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.4) internal successors, (762), 5 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,798 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,798 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 96 flow. Second operand 5 states and 762 transitions. [2023-11-12 02:06:49,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 230 flow [2023-11-12 02:06:49,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 212 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-12 02:06:49,803 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 135 flow [2023-11-12 02:06:49,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=84, 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=5, PETRI_FLOW=135, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-11-12 02:06:49,805 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2023-11-12 02:06:49,805 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 135 flow [2023-11-12 02:06:49,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:49,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:49,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:06:49,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:49,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1032824543, now seen corresponding path program 2 times [2023-11-12 02:06:49,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:49,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952409422] [2023-11-12 02:06:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:49,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:06:49,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:49,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952409422] [2023-11-12 02:06:49,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952409422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:49,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:49,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:06:49,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831459257] [2023-11-12 02:06:49,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:49,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:49,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:49,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:49,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:49,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 336 [2023-11-12 02:06:49,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:49,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:49,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 336 [2023-11-12 02:06:49,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:50,134 INFO L124 PetriNetUnfolderBase]: 103/188 cut-off events. [2023-11-12 02:06:50,135 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-11-12 02:06:50,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 188 events. 103/188 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 539 event pairs, 41 based on Foata normal form. 4/190 useless extension candidates. Maximal degree in co-relation 640. Up to 157 conditions per place. [2023-11-12 02:06:50,137 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 29 selfloop transitions, 11 changer transitions 5/45 dead transitions. [2023-11-12 02:06:50,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 304 flow [2023-11-12 02:06:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 762 transitions. [2023-11-12 02:06:50,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2023-11-12 02:06:50,142 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 762 transitions. [2023-11-12 02:06:50,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 762 transitions. [2023-11-12 02:06:50,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:50,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 762 transitions. [2023-11-12 02:06:50,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.4) internal successors, (762), 5 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:50,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:50,152 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:50,152 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 135 flow. Second operand 5 states and 762 transitions. [2023-11-12 02:06:50,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 304 flow [2023-11-12 02:06:50,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 45 transitions, 272 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-12 02:06:50,159 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 190 flow [2023-11-12 02:06:50,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2023-11-12 02:06:50,163 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-12 02:06:50,163 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 190 flow [2023-11-12 02:06:50,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:50,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:50,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:50,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:06:50,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:50,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:50,166 INFO L85 PathProgramCache]: Analyzing trace with hash -936133628, now seen corresponding path program 1 times [2023-11-12 02:06:50,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:50,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105077421] [2023-11-12 02:06:50,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:50,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:06:50,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:50,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105077421] [2023-11-12 02:06:50,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105077421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:06:50,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662657685] [2023-11-12 02:06:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:50,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:50,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:50,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:06:50,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:06:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:50,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:06:50,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:06:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:06:50,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:06:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662657685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:50,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:06:50,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-12 02:06:50,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892268451] [2023-11-12 02:06:50,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:50,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:06:50,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:50,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:06:50,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:06:50,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 336 [2023-11-12 02:06:50,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:50,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:50,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 336 [2023-11-12 02:06:50,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:50,665 INFO L124 PetriNetUnfolderBase]: 114/226 cut-off events. [2023-11-12 02:06:50,665 INFO L125 PetriNetUnfolderBase]: For 394/394 co-relation queries the response was YES. [2023-11-12 02:06:50,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 226 events. 114/226 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 738 event pairs, 62 based on Foata normal form. 16/239 useless extension candidates. Maximal degree in co-relation 830. Up to 180 conditions per place. [2023-11-12 02:06:50,668 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 33 selfloop transitions, 2 changer transitions 16/51 dead transitions. [2023-11-12 02:06:50,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 380 flow [2023-11-12 02:06:50,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:06:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:06:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 602 transitions. [2023-11-12 02:06:50,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-11-12 02:06:50,673 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 602 transitions. [2023-11-12 02:06:50,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 602 transitions. [2023-11-12 02:06:50,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:50,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 602 transitions. [2023-11-12 02:06:50,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:50,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:50,683 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:50,683 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 190 flow. Second operand 4 states and 602 transitions. [2023-11-12 02:06:50,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 380 flow [2023-11-12 02:06:50,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 51 transitions, 366 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-11-12 02:06:50,688 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 202 flow [2023-11-12 02:06:50,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-11-12 02:06:50,691 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 17 predicate places. [2023-11-12 02:06:50,691 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 202 flow [2023-11-12 02:06:50,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:50,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:50,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:50,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:06:50,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:50,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:50,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash 181794857, now seen corresponding path program 1 times [2023-11-12 02:06:50,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:50,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468470819] [2023-11-12 02:06:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:50,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:51,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:51,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468470819] [2023-11-12 02:06:51,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468470819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:06:51,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97550540] [2023-11-12 02:06:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:51,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:51,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:51,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:06:51,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:06:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:51,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:06:51,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:06:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:51,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:06:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:51,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97550540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:06:51,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:06:51,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-12 02:06:51,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655137025] [2023-11-12 02:06:51,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:06:51,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:06:51,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:51,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:06:51,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:06:51,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:06:51,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 147.125) internal successors, (1177), 8 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:51,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:51,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:06:51,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:51,490 INFO L124 PetriNetUnfolderBase]: 106/194 cut-off events. [2023-11-12 02:06:51,490 INFO L125 PetriNetUnfolderBase]: For 238/238 co-relation queries the response was YES. [2023-11-12 02:06:51,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 194 events. 106/194 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 591 event pairs, 14 based on Foata normal form. 6/199 useless extension candidates. Maximal degree in co-relation 698. Up to 61 conditions per place. [2023-11-12 02:06:51,493 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 54 selfloop transitions, 13 changer transitions 0/67 dead transitions. [2023-11-12 02:06:51,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 67 transitions, 465 flow [2023-11-12 02:06:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:06:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:06:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1061 transitions. [2023-11-12 02:06:51,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45110544217687076 [2023-11-12 02:06:51,498 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1061 transitions. [2023-11-12 02:06:51,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1061 transitions. [2023-11-12 02:06:51,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:51,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1061 transitions. [2023-11-12 02:06:51,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.57142857142858) internal successors, (1061), 7 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:51,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 336.0) internal successors, (2688), 8 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:51,509 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 336.0) internal successors, (2688), 8 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:51,509 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 202 flow. Second operand 7 states and 1061 transitions. [2023-11-12 02:06:51,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 67 transitions, 465 flow [2023-11-12 02:06:51,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 67 transitions, 449 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-12 02:06:51,514 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 260 flow [2023-11-12 02:06:51,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=260, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-11-12 02:06:51,515 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 22 predicate places. [2023-11-12 02:06:51,515 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 260 flow [2023-11-12 02:06:51,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.125) internal successors, (1177), 8 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:51,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:51,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:51,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:06:51,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:06:51,722 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:51,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:51,722 INFO L85 PathProgramCache]: Analyzing trace with hash -478516756, now seen corresponding path program 1 times [2023-11-12 02:06:51,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:51,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424529749] [2023-11-12 02:06:51,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:51,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:51,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:51,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424529749] [2023-11-12 02:06:51,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424529749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:51,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:51,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:06:51,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142183837] [2023-11-12 02:06:51,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:51,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:51,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:51,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:51,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:51,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 336 [2023-11-12 02:06:51,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:51,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:51,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 336 [2023-11-12 02:06:51,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:52,008 INFO L124 PetriNetUnfolderBase]: 114/214 cut-off events. [2023-11-12 02:06:52,009 INFO L125 PetriNetUnfolderBase]: For 517/517 co-relation queries the response was YES. [2023-11-12 02:06:52,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 214 events. 114/214 cut-off events. For 517/517 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 637 event pairs, 21 based on Foata normal form. 4/217 useless extension candidates. Maximal degree in co-relation 845. Up to 88 conditions per place. [2023-11-12 02:06:52,011 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 42 selfloop transitions, 15 changer transitions 1/58 dead transitions. [2023-11-12 02:06:52,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 58 transitions, 460 flow [2023-11-12 02:06:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 770 transitions. [2023-11-12 02:06:52,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-11-12 02:06:52,016 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 770 transitions. [2023-11-12 02:06:52,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 770 transitions. [2023-11-12 02:06:52,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:52,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 770 transitions. [2023-11-12 02:06:52,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,023 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,023 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 260 flow. Second operand 5 states and 770 transitions. [2023-11-12 02:06:52,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 58 transitions, 460 flow [2023-11-12 02:06:52,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 426 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-12 02:06:52,028 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 290 flow [2023-11-12 02:06:52,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-11-12 02:06:52,029 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2023-11-12 02:06:52,030 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 290 flow [2023-11-12 02:06:52,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:52,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:06:52,031 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:52,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1286626713, now seen corresponding path program 2 times [2023-11-12 02:06:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691374583] [2023-11-12 02:06:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:52,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:52,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691374583] [2023-11-12 02:06:52,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691374583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:52,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:52,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:06:52,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375843384] [2023-11-12 02:06:52,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:52,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:52,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:52,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:52,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:52,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 336 [2023-11-12 02:06:52,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:52,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 336 [2023-11-12 02:06:52,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:52,285 INFO L124 PetriNetUnfolderBase]: 115/217 cut-off events. [2023-11-12 02:06:52,286 INFO L125 PetriNetUnfolderBase]: For 606/606 co-relation queries the response was YES. [2023-11-12 02:06:52,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 217 events. 115/217 cut-off events. For 606/606 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 681 event pairs, 34 based on Foata normal form. 2/218 useless extension candidates. Maximal degree in co-relation 879. Up to 146 conditions per place. [2023-11-12 02:06:52,288 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 42 selfloop transitions, 13 changer transitions 4/59 dead transitions. [2023-11-12 02:06:52,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 493 flow [2023-11-12 02:06:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 768 transitions. [2023-11-12 02:06:52,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-11-12 02:06:52,293 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 768 transitions. [2023-11-12 02:06:52,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 768 transitions. [2023-11-12 02:06:52,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:52,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 768 transitions. [2023-11-12 02:06:52,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.6) internal successors, (768), 5 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,302 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,302 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 290 flow. Second operand 5 states and 768 transitions. [2023-11-12 02:06:52,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 493 flow [2023-11-12 02:06:52,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 473 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:06:52,308 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 305 flow [2023-11-12 02:06:52,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=305, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-12 02:06:52,309 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 30 predicate places. [2023-11-12 02:06:52,309 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 305 flow [2023-11-12 02:06:52,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:52,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:52,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:06:52,310 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:52,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:52,311 INFO L85 PathProgramCache]: Analyzing trace with hash 67650212, now seen corresponding path program 2 times [2023-11-12 02:06:52,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:52,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948348319] [2023-11-12 02:06:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:52,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:52,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948348319] [2023-11-12 02:06:52,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948348319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:52,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:52,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:06:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736554235] [2023-11-12 02:06:52,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:52,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:52,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:52,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:52,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 336 [2023-11-12 02:06:52,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:52,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 336 [2023-11-12 02:06:52,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:52,561 INFO L124 PetriNetUnfolderBase]: 118/222 cut-off events. [2023-11-12 02:06:52,561 INFO L125 PetriNetUnfolderBase]: For 770/770 co-relation queries the response was YES. [2023-11-12 02:06:52,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 222 events. 118/222 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 706 event pairs, 34 based on Foata normal form. 4/225 useless extension candidates. Maximal degree in co-relation 929. Up to 179 conditions per place. [2023-11-12 02:06:52,564 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 39 selfloop transitions, 13 changer transitions 0/52 dead transitions. [2023-11-12 02:06:52,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 447 flow [2023-11-12 02:06:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 761 transitions. [2023-11-12 02:06:52,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529761904761905 [2023-11-12 02:06:52,568 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 761 transitions. [2023-11-12 02:06:52,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 761 transitions. [2023-11-12 02:06:52,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:52,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 761 transitions. [2023-11-12 02:06:52,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.2) internal successors, (761), 5 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,576 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,577 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 305 flow. Second operand 5 states and 761 transitions. [2023-11-12 02:06:52,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 447 flow [2023-11-12 02:06:52,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 420 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-12 02:06:52,582 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 311 flow [2023-11-12 02:06:52,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-11-12 02:06:52,583 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 30 predicate places. [2023-11-12 02:06:52,584 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 311 flow [2023-11-12 02:06:52,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:52,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:52,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:06:52,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:52,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2142370053, now seen corresponding path program 3 times [2023-11-12 02:06:52,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:52,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083977168] [2023-11-12 02:06:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:52,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:52,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:52,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083977168] [2023-11-12 02:06:52,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083977168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:52,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:52,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:06:52,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605190420] [2023-11-12 02:06:52,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:52,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:52,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:52,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:52,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:52,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 336 [2023-11-12 02:06:52,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 311 flow. Second operand has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:52,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 336 [2023-11-12 02:06:52,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:52,827 INFO L124 PetriNetUnfolderBase]: 119/225 cut-off events. [2023-11-12 02:06:52,827 INFO L125 PetriNetUnfolderBase]: For 639/639 co-relation queries the response was YES. [2023-11-12 02:06:52,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 225 events. 119/225 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 718 event pairs, 38 based on Foata normal form. 2/226 useless extension candidates. Maximal degree in co-relation 951. Up to 181 conditions per place. [2023-11-12 02:06:52,830 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 36 selfloop transitions, 12 changer transitions 3/51 dead transitions. [2023-11-12 02:06:52,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 447 flow [2023-11-12 02:06:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2023-11-12 02:06:52,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517857142857143 [2023-11-12 02:06:52,835 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2023-11-12 02:06:52,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2023-11-12 02:06:52,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:52,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2023-11-12 02:06:52,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,843 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,843 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 311 flow. Second operand 5 states and 759 transitions. [2023-11-12 02:06:52,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 447 flow [2023-11-12 02:06:52,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 417 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-12 02:06:52,849 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 297 flow [2023-11-12 02:06:52,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-11-12 02:06:52,850 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 31 predicate places. [2023-11-12 02:06:52,850 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 297 flow [2023-11-12 02:06:52,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:52,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:52,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:52,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:06:52,852 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:52,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1509554843, now seen corresponding path program 4 times [2023-11-12 02:06:52,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:52,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384270788] [2023-11-12 02:06:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:52,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:52,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:52,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384270788] [2023-11-12 02:06:52,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384270788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:06:52,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843517714] [2023-11-12 02:06:52,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:06:52,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:52,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:06:53,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:06:53,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:06:53,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:06:53,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:06:53,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:06:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:53,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:06:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:53,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843517714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:06:53,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:06:53,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-12 02:06:53,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713040312] [2023-11-12 02:06:53,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:06:53,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:06:53,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:53,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:06:53,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:06:53,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:06:53,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 146.9) internal successors, (1469), 10 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:53,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:53,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:06:53,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:53,448 INFO L124 PetriNetUnfolderBase]: 132/248 cut-off events. [2023-11-12 02:06:53,448 INFO L125 PetriNetUnfolderBase]: For 714/714 co-relation queries the response was YES. [2023-11-12 02:06:53,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 248 events. 132/248 cut-off events. For 714/714 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 837 event pairs, 24 based on Foata normal form. 6/253 useless extension candidates. Maximal degree in co-relation 1043. Up to 131 conditions per place. [2023-11-12 02:06:53,452 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 50 selfloop transitions, 23 changer transitions 0/73 dead transitions. [2023-11-12 02:06:53,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 595 flow [2023-11-12 02:06:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:06:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:06:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1498 transitions. [2023-11-12 02:06:53,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2023-11-12 02:06:53,459 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1498 transitions. [2023-11-12 02:06:53,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1498 transitions. [2023-11-12 02:06:53,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:53,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1498 transitions. [2023-11-12 02:06:53,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 149.8) internal successors, (1498), 10 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:53,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 336.0) internal successors, (3696), 11 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:53,473 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 336.0) internal successors, (3696), 11 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:53,473 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 297 flow. Second operand 10 states and 1498 transitions. [2023-11-12 02:06:53,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 595 flow [2023-11-12 02:06:53,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 571 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:06:53,479 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 402 flow [2023-11-12 02:06:53,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=402, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2023-11-12 02:06:53,479 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2023-11-12 02:06:53,480 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 402 flow [2023-11-12 02:06:53,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.9) internal successors, (1469), 10 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:53,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:53,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:53,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:06:53,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:06:53,686 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:53,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:53,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2010579675, now seen corresponding path program 5 times [2023-11-12 02:06:53,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:53,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763525858] [2023-11-12 02:06:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:53,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:53,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:53,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763525858] [2023-11-12 02:06:53,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763525858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:53,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:53,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:06:53,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717533562] [2023-11-12 02:06:53,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:53,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:53,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:53,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:53,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 336 [2023-11-12 02:06:53,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 402 flow. Second operand has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:53,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:53,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 336 [2023-11-12 02:06:53,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:53,976 INFO L124 PetriNetUnfolderBase]: 130/246 cut-off events. [2023-11-12 02:06:53,976 INFO L125 PetriNetUnfolderBase]: For 966/966 co-relation queries the response was YES. [2023-11-12 02:06:53,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 246 events. 130/246 cut-off events. For 966/966 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 807 event pairs, 40 based on Foata normal form. 2/247 useless extension candidates. Maximal degree in co-relation 1133. Up to 193 conditions per place. [2023-11-12 02:06:53,980 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 37 selfloop transitions, 17 changer transitions 3/57 dead transitions. [2023-11-12 02:06:53,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 556 flow [2023-11-12 02:06:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2023-11-12 02:06:53,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517857142857143 [2023-11-12 02:06:53,984 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2023-11-12 02:06:53,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2023-11-12 02:06:53,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:53,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2023-11-12 02:06:53,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:53,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:53,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:53,991 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 402 flow. Second operand 5 states and 759 transitions. [2023-11-12 02:06:53,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 556 flow [2023-11-12 02:06:53,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 494 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-12 02:06:53,998 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 375 flow [2023-11-12 02:06:53,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=375, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2023-11-12 02:06:54,000 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2023-11-12 02:06:54,001 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 375 flow [2023-11-12 02:06:54,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:54,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:54,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:06:54,018 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:54,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:54,018 INFO L85 PathProgramCache]: Analyzing trace with hash -238874418, now seen corresponding path program 3 times [2023-11-12 02:06:54,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:54,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079098195] [2023-11-12 02:06:54,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:54,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:54,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:54,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079098195] [2023-11-12 02:06:54,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079098195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:54,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:54,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:06:54,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883602534] [2023-11-12 02:06:54,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:54,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:54,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:54,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:54,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 336 [2023-11-12 02:06:54,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 375 flow. Second operand has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:54,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 336 [2023-11-12 02:06:54,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:54,311 INFO L124 PetriNetUnfolderBase]: 118/217 cut-off events. [2023-11-12 02:06:54,311 INFO L125 PetriNetUnfolderBase]: For 919/919 co-relation queries the response was YES. [2023-11-12 02:06:54,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 217 events. 118/217 cut-off events. For 919/919 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 651 event pairs, 31 based on Foata normal form. 4/220 useless extension candidates. Maximal degree in co-relation 988. Up to 159 conditions per place. [2023-11-12 02:06:54,314 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 38 selfloop transitions, 18 changer transitions 1/57 dead transitions. [2023-11-12 02:06:54,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 524 flow [2023-11-12 02:06:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 760 transitions. [2023-11-12 02:06:54,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2023-11-12 02:06:54,318 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 760 transitions. [2023-11-12 02:06:54,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 760 transitions. [2023-11-12 02:06:54,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:54,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 760 transitions. [2023-11-12 02:06:54,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,325 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,326 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 375 flow. Second operand 5 states and 760 transitions. [2023-11-12 02:06:54,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 524 flow [2023-11-12 02:06:54,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 484 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-12 02:06:54,332 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 360 flow [2023-11-12 02:06:54,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2023-11-12 02:06:54,333 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 39 predicate places. [2023-11-12 02:06:54,333 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 360 flow [2023-11-12 02:06:54,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:54,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:54,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:06:54,335 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:54,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1154083729, now seen corresponding path program 6 times [2023-11-12 02:06:54,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:54,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724602886] [2023-11-12 02:06:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:54,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:54,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:54,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724602886] [2023-11-12 02:06:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724602886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:54,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:54,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:06:54,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707759618] [2023-11-12 02:06:54,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:54,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:54,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:54,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:54,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 336 [2023-11-12 02:06:54,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:54,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 336 [2023-11-12 02:06:54,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:54,583 INFO L124 PetriNetUnfolderBase]: 107/192 cut-off events. [2023-11-12 02:06:54,584 INFO L125 PetriNetUnfolderBase]: For 816/816 co-relation queries the response was YES. [2023-11-12 02:06:54,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 192 events. 107/192 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 552 event pairs, 28 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 847. Up to 142 conditions per place. [2023-11-12 02:06:54,586 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 40 selfloop transitions, 16 changer transitions 1/57 dead transitions. [2023-11-12 02:06:54,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 512 flow [2023-11-12 02:06:54,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:06:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:06:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 762 transitions. [2023-11-12 02:06:54,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2023-11-12 02:06:54,591 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 762 transitions. [2023-11-12 02:06:54,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 762 transitions. [2023-11-12 02:06:54,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:54,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 762 transitions. [2023-11-12 02:06:54,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.4) internal successors, (762), 5 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,598 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,598 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 360 flow. Second operand 5 states and 762 transitions. [2023-11-12 02:06:54,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 512 flow [2023-11-12 02:06:54,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 472 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-12 02:06:54,604 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 335 flow [2023-11-12 02:06:54,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2023-11-12 02:06:54,605 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-11-12 02:06:54,605 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 335 flow [2023-11-12 02:06:54,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:54,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:54,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:54,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:06:54,607 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:54,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:54,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1065438846, now seen corresponding path program 1 times [2023-11-12 02:06:54,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:54,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863898056] [2023-11-12 02:06:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:54,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:06:54,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:54,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863898056] [2023-11-12 02:06:54,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863898056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:06:54,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082808929] [2023-11-12 02:06:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:54,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:54,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:54,897 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:06:54,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:06:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:55,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:06:55,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:06:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:06:55,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:06:55,143 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 36 treesize of output 12 [2023-11-12 02:06:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:06:55,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082808929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:06:55,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:06:55,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-11-12 02:06:55,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388069807] [2023-11-12 02:06:55,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:06:55,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:06:55,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:55,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:06:55,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:06:55,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 336 [2023-11-12 02:06:55,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 335 flow. Second operand has 11 states, 11 states have (on average 133.72727272727272) internal successors, (1471), 11 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:55,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:55,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 336 [2023-11-12 02:06:55,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:55,790 INFO L124 PetriNetUnfolderBase]: 295/528 cut-off events. [2023-11-12 02:06:55,791 INFO L125 PetriNetUnfolderBase]: For 1506/1506 co-relation queries the response was YES. [2023-11-12 02:06:55,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2264 conditions, 528 events. 295/528 cut-off events. For 1506/1506 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2086 event pairs, 46 based on Foata normal form. 2/528 useless extension candidates. Maximal degree in co-relation 1964. Up to 177 conditions per place. [2023-11-12 02:06:55,797 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 86 selfloop transitions, 33 changer transitions 12/131 dead transitions. [2023-11-12 02:06:55,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 131 transitions, 1144 flow [2023-11-12 02:06:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:06:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:06:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1123 transitions. [2023-11-12 02:06:55,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4177827380952381 [2023-11-12 02:06:55,803 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1123 transitions. [2023-11-12 02:06:55,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1123 transitions. [2023-11-12 02:06:55,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:55,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1123 transitions. [2023-11-12 02:06:55,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 140.375) internal successors, (1123), 8 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:55,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 336.0) internal successors, (3024), 9 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:55,815 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 336.0) internal successors, (3024), 9 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:55,815 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 335 flow. Second operand 8 states and 1123 transitions. [2023-11-12 02:06:55,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 131 transitions, 1144 flow [2023-11-12 02:06:55,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 131 transitions, 998 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-11-12 02:06:55,825 INFO L231 Difference]: Finished difference. Result has 62 places, 76 transitions, 661 flow [2023-11-12 02:06:55,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=661, PETRI_PLACES=62, PETRI_TRANSITIONS=76} [2023-11-12 02:06:55,826 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2023-11-12 02:06:55,826 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 76 transitions, 661 flow [2023-11-12 02:06:55,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 133.72727272727272) internal successors, (1471), 11 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:55,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:55,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:55,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:06:56,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:06:56,033 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:56,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:56,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1919201316, now seen corresponding path program 2 times [2023-11-12 02:06:56,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:56,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479046048] [2023-11-12 02:06:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:56,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:06:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:56,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479046048] [2023-11-12 02:06:56,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479046048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:06:56,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889754092] [2023-11-12 02:06:56,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:06:56,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:56,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:06:56,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:06:56,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:06:56,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:06:56,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:06:56,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:06:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:56,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:06:56,507 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 36 treesize of output 12 [2023-11-12 02:06:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:06:56,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889754092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:06:56,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:06:56,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-11-12 02:06:56,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5779859] [2023-11-12 02:06:56,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:06:56,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:06:56,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:56,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:06:56,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:06:56,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 336 [2023-11-12 02:06:56,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 76 transitions, 661 flow. Second operand has 11 states, 11 states have (on average 133.54545454545453) internal successors, (1469), 11 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:56,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:06:56,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 336 [2023-11-12 02:06:56,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:06:57,241 INFO L124 PetriNetUnfolderBase]: 691/1248 cut-off events. [2023-11-12 02:06:57,241 INFO L125 PetriNetUnfolderBase]: For 3031/3031 co-relation queries the response was YES. [2023-11-12 02:06:57,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5408 conditions, 1248 events. 691/1248 cut-off events. For 3031/3031 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6415 event pairs, 136 based on Foata normal form. 5/1249 useless extension candidates. Maximal degree in co-relation 5040. Up to 489 conditions per place. [2023-11-12 02:06:57,253 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 109 selfloop transitions, 54 changer transitions 20/183 dead transitions. [2023-11-12 02:06:57,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 183 transitions, 1874 flow [2023-11-12 02:06:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:06:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:06:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1117 transitions. [2023-11-12 02:06:57,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41555059523809523 [2023-11-12 02:06:57,258 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1117 transitions. [2023-11-12 02:06:57,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1117 transitions. [2023-11-12 02:06:57,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:06:57,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1117 transitions. [2023-11-12 02:06:57,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 139.625) internal successors, (1117), 8 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:57,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 336.0) internal successors, (3024), 9 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:57,269 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 336.0) internal successors, (3024), 9 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:57,270 INFO L175 Difference]: Start difference. First operand has 62 places, 76 transitions, 661 flow. Second operand 8 states and 1117 transitions. [2023-11-12 02:06:57,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 183 transitions, 1874 flow [2023-11-12 02:06:57,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 183 transitions, 1812 flow, removed 30 selfloop flow, removed 1 redundant places. [2023-11-12 02:06:57,289 INFO L231 Difference]: Finished difference. Result has 73 places, 119 transitions, 1330 flow [2023-11-12 02:06:57,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1330, PETRI_PLACES=73, PETRI_TRANSITIONS=119} [2023-11-12 02:06:57,290 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 51 predicate places. [2023-11-12 02:06:57,290 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 119 transitions, 1330 flow [2023-11-12 02:06:57,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 133.54545454545453) internal successors, (1469), 11 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:06:57,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:06:57,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:06:57,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 02:06:57,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:06:57,498 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:06:57,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash -842901256, now seen corresponding path program 3 times [2023-11-12 02:06:57,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:57,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039388561] [2023-11-12 02:06:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:06:58,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:58,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039388561] [2023-11-12 02:06:58,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039388561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:06:58,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204313752] [2023-11-12 02:06:58,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:06:58,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:58,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:58,277 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:06:58,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:06:58,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:06:58,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:06:58,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 02:06:58,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:06:58,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-12 02:06:58,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:06:58,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:06:58,803 INFO L322 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-12 02:06:58,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2023-11-12 02:06:58,823 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 20 [2023-11-12 02:06:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:06:58,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:06:59,480 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:06:59,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 86 [2023-11-12 02:06:59,539 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:06:59,539 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 281 [2023-11-12 02:06:59,628 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:06:59,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 217 [2023-11-12 02:06:59,692 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 60 treesize of output 42 [2023-11-12 02:07:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:07:04,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204313752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:04,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:04,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:07:04,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503463950] [2023-11-12 02:07:04,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:04,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:07:04,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:07:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=353, Unknown=2, NotChecked=0, Total=420 [2023-11-12 02:07:05,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 336 [2023-11-12 02:07:05,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 119 transitions, 1330 flow. Second operand has 21 states, 21 states have (on average 101.42857142857143) internal successors, (2130), 21 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:05,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:05,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 336 [2023-11-12 02:07:05,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:06,390 INFO L124 PetriNetUnfolderBase]: 621/1128 cut-off events. [2023-11-12 02:07:06,390 INFO L125 PetriNetUnfolderBase]: For 4219/4219 co-relation queries the response was YES. [2023-11-12 02:07:06,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5363 conditions, 1128 events. 621/1128 cut-off events. For 4219/4219 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5665 event pairs, 156 based on Foata normal form. 1/1127 useless extension candidates. Maximal degree in co-relation 5145. Up to 767 conditions per place. [2023-11-12 02:07:06,402 INFO L140 encePairwiseOnDemand]: 329/336 looper letters, 91 selfloop transitions, 22 changer transitions 39/152 dead transitions. [2023-11-12 02:07:06,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 152 transitions, 1832 flow [2023-11-12 02:07:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:07:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:07:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 841 transitions. [2023-11-12 02:07:06,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31287202380952384 [2023-11-12 02:07:06,408 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 841 transitions. [2023-11-12 02:07:06,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 841 transitions. [2023-11-12 02:07:06,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:06,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 841 transitions. [2023-11-12 02:07:06,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.125) internal successors, (841), 8 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:06,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 336.0) internal successors, (3024), 9 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:06,418 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 336.0) internal successors, (3024), 9 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:06,418 INFO L175 Difference]: Start difference. First operand has 73 places, 119 transitions, 1330 flow. Second operand 8 states and 841 transitions. [2023-11-12 02:07:06,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 152 transitions, 1832 flow [2023-11-12 02:07:06,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 152 transitions, 1777 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-11-12 02:07:06,447 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 1089 flow [2023-11-12 02:07:06,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1089, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2023-11-12 02:07:06,448 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2023-11-12 02:07:06,448 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 1089 flow [2023-11-12 02:07:06,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.42857142857143) internal successors, (2130), 21 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:06,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:06,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:06,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:06,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:07:06,657 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:06,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1956593927, now seen corresponding path program 4 times [2023-11-12 02:07:06,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:06,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318848198] [2023-11-12 02:07:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:06,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:06,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:06,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318848198] [2023-11-12 02:07:06,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318848198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:06,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624892029] [2023-11-12 02:07:06,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:07:06,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:06,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:06,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:06,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:07:06,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:07:06,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:07:06,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:06,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:07,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:07,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624892029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:07,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:07,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-12 02:07:07,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808720211] [2023-11-12 02:07:07,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:07,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:07:07,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:07:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:07:07,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:07,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 1089 flow. Second operand has 13 states, 13 states have (on average 146.46153846153845) internal successors, (1904), 13 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:07,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:07,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:07,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:07,564 INFO L124 PetriNetUnfolderBase]: 663/1168 cut-off events. [2023-11-12 02:07:07,564 INFO L125 PetriNetUnfolderBase]: For 4191/4191 co-relation queries the response was YES. [2023-11-12 02:07:07,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5197 conditions, 1168 events. 663/1168 cut-off events. For 4191/4191 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5597 event pairs, 135 based on Foata normal form. 72/1240 useless extension candidates. Maximal degree in co-relation 5134. Up to 811 conditions per place. [2023-11-12 02:07:07,577 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 110 selfloop transitions, 73 changer transitions 1/184 dead transitions. [2023-11-12 02:07:07,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 184 transitions, 2131 flow [2023-11-12 02:07:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:07:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:07:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1647 transitions. [2023-11-12 02:07:07,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44561688311688313 [2023-11-12 02:07:07,587 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1647 transitions. [2023-11-12 02:07:07,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1647 transitions. [2023-11-12 02:07:07,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:07,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1647 transitions. [2023-11-12 02:07:07,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 149.72727272727272) internal successors, (1647), 11 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:07,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 336.0) internal successors, (4032), 12 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:07,603 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 336.0) internal successors, (4032), 12 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:07,603 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 1089 flow. Second operand 11 states and 1647 transitions. [2023-11-12 02:07:07,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 184 transitions, 2131 flow [2023-11-12 02:07:07,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 184 transitions, 1998 flow, removed 41 selfloop flow, removed 6 redundant places. [2023-11-12 02:07:07,626 INFO L231 Difference]: Finished difference. Result has 87 places, 148 transitions, 1658 flow [2023-11-12 02:07:07,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1658, PETRI_PLACES=87, PETRI_TRANSITIONS=148} [2023-11-12 02:07:07,626 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 65 predicate places. [2023-11-12 02:07:07,627 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 148 transitions, 1658 flow [2023-11-12 02:07:07,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 146.46153846153845) internal successors, (1904), 13 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:07,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:07,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:07,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:07,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:07,833 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:07,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:07,834 INFO L85 PathProgramCache]: Analyzing trace with hash 141943743, now seen corresponding path program 5 times [2023-11-12 02:07:07,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:07,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104155674] [2023-11-12 02:07:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:07,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:07,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:07,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104155674] [2023-11-12 02:07:07,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104155674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:07,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850538513] [2023-11-12 02:07:07,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:07:07,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:07,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:07,959 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:07,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:07:08,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:07:08,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:07:08,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:08,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:08,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:08,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850538513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:08,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:08,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-12 02:07:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849898504] [2023-11-12 02:07:08,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:08,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:07:08,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:08,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:07:08,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:07:08,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:08,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 148 transitions, 1658 flow. Second operand has 12 states, 12 states have (on average 146.33333333333334) internal successors, (1756), 12 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:08,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:08,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:08,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:08,817 INFO L124 PetriNetUnfolderBase]: 755/1304 cut-off events. [2023-11-12 02:07:08,817 INFO L125 PetriNetUnfolderBase]: For 4517/4517 co-relation queries the response was YES. [2023-11-12 02:07:08,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6679 conditions, 1304 events. 755/1304 cut-off events. For 4517/4517 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6400 event pairs, 92 based on Foata normal form. 20/1324 useless extension candidates. Maximal degree in co-relation 6481. Up to 631 conditions per place. [2023-11-12 02:07:08,832 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 143 selfloop transitions, 77 changer transitions 3/223 dead transitions. [2023-11-12 02:07:08,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 223 transitions, 2833 flow [2023-11-12 02:07:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:07:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:07:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1941 transitions. [2023-11-12 02:07:08,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44436813186813184 [2023-11-12 02:07:08,837 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1941 transitions. [2023-11-12 02:07:08,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1941 transitions. [2023-11-12 02:07:08,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:08,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1941 transitions. [2023-11-12 02:07:08,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 149.30769230769232) internal successors, (1941), 13 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:08,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 336.0) internal successors, (4704), 14 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:08,850 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 336.0) internal successors, (4704), 14 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:08,850 INFO L175 Difference]: Start difference. First operand has 87 places, 148 transitions, 1658 flow. Second operand 13 states and 1941 transitions. [2023-11-12 02:07:08,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 223 transitions, 2833 flow [2023-11-12 02:07:08,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 223 transitions, 2649 flow, removed 89 selfloop flow, removed 1 redundant places. [2023-11-12 02:07:08,885 INFO L231 Difference]: Finished difference. Result has 104 places, 179 transitions, 2080 flow [2023-11-12 02:07:08,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=1474, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2080, PETRI_PLACES=104, PETRI_TRANSITIONS=179} [2023-11-12 02:07:08,886 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 82 predicate places. [2023-11-12 02:07:08,886 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 179 transitions, 2080 flow [2023-11-12 02:07:08,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 146.33333333333334) internal successors, (1756), 12 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:08,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:08,889 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:08,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:09,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:09,095 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:09,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:09,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1867050035, now seen corresponding path program 6 times [2023-11-12 02:07:09,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:09,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090480881] [2023-11-12 02:07:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:09,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:09,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:09,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090480881] [2023-11-12 02:07:09,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090480881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:09,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707966788] [2023-11-12 02:07:09,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:07:09,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:09,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:09,287 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:09,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:07:09,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-12 02:07:09,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:07:09,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:09,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:09,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:09,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707966788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:09,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:09,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-12 02:07:09,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069164189] [2023-11-12 02:07:09,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:09,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:07:09,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:07:09,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:07:09,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:09,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 179 transitions, 2080 flow. Second operand has 12 states, 12 states have (on average 146.5) internal successors, (1758), 12 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:09,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:09,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:09,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:10,286 INFO L124 PetriNetUnfolderBase]: 762/1341 cut-off events. [2023-11-12 02:07:10,286 INFO L125 PetriNetUnfolderBase]: For 6448/6448 co-relation queries the response was YES. [2023-11-12 02:07:10,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7380 conditions, 1341 events. 762/1341 cut-off events. For 6448/6448 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6776 event pairs, 89 based on Foata normal form. 44/1377 useless extension candidates. Maximal degree in co-relation 7163. Up to 602 conditions per place. [2023-11-12 02:07:10,302 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 144 selfloop transitions, 93 changer transitions 3/240 dead transitions. [2023-11-12 02:07:10,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 240 transitions, 3201 flow [2023-11-12 02:07:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:07:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:07:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2390 transitions. [2023-11-12 02:07:10,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445684523809524 [2023-11-12 02:07:10,308 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2390 transitions. [2023-11-12 02:07:10,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2390 transitions. [2023-11-12 02:07:10,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:10,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2390 transitions. [2023-11-12 02:07:10,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 149.375) internal successors, (2390), 16 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:10,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:10,327 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:10,327 INFO L175 Difference]: Start difference. First operand has 104 places, 179 transitions, 2080 flow. Second operand 16 states and 2390 transitions. [2023-11-12 02:07:10,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 240 transitions, 3201 flow [2023-11-12 02:07:10,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 240 transitions, 2828 flow, removed 153 selfloop flow, removed 4 redundant places. [2023-11-12 02:07:10,388 INFO L231 Difference]: Finished difference. Result has 118 places, 190 transitions, 2138 flow [2023-11-12 02:07:10,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2138, PETRI_PLACES=118, PETRI_TRANSITIONS=190} [2023-11-12 02:07:10,389 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 96 predicate places. [2023-11-12 02:07:10,389 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 190 transitions, 2138 flow [2023-11-12 02:07:10,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 146.5) internal successors, (1758), 12 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:10,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:10,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:10,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:10,595 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:10,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash -383003329, now seen corresponding path program 7 times [2023-11-12 02:07:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:10,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078137047] [2023-11-12 02:07:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:10,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:10,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078137047] [2023-11-12 02:07:10,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078137047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:10,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833468755] [2023-11-12 02:07:10,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:07:10,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:10,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:10,730 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:10,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:07:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:10,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:10,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:10,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:11,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833468755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:11,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:11,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-12 02:07:11,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946493070] [2023-11-12 02:07:11,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:11,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:07:11,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:07:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:07:11,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:11,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 190 transitions, 2138 flow. Second operand has 13 states, 13 states have (on average 146.3846153846154) internal successors, (1903), 13 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:11,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:11,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:11,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:11,794 INFO L124 PetriNetUnfolderBase]: 940/1631 cut-off events. [2023-11-12 02:07:11,794 INFO L125 PetriNetUnfolderBase]: For 8826/8826 co-relation queries the response was YES. [2023-11-12 02:07:11,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9258 conditions, 1631 events. 940/1631 cut-off events. For 8826/8826 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8540 event pairs, 93 based on Foata normal form. 36/1655 useless extension candidates. Maximal degree in co-relation 8945. Up to 691 conditions per place. [2023-11-12 02:07:11,821 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 138 selfloop transitions, 176 changer transitions 5/319 dead transitions. [2023-11-12 02:07:11,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 319 transitions, 4168 flow [2023-11-12 02:07:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:07:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:07:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2539 transitions. [2023-11-12 02:07:11,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44450280112044815 [2023-11-12 02:07:11,829 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2539 transitions. [2023-11-12 02:07:11,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2539 transitions. [2023-11-12 02:07:11,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:11,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2539 transitions. [2023-11-12 02:07:11,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 149.35294117647058) internal successors, (2539), 17 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:11,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 336.0) internal successors, (6048), 18 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:11,847 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 336.0) internal successors, (6048), 18 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:11,847 INFO L175 Difference]: Start difference. First operand has 118 places, 190 transitions, 2138 flow. Second operand 17 states and 2539 transitions. [2023-11-12 02:07:11,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 319 transitions, 4168 flow [2023-11-12 02:07:11,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 319 transitions, 3882 flow, removed 45 selfloop flow, removed 10 redundant places. [2023-11-12 02:07:11,913 INFO L231 Difference]: Finished difference. Result has 131 places, 268 transitions, 3426 flow [2023-11-12 02:07:11,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3426, PETRI_PLACES=131, PETRI_TRANSITIONS=268} [2023-11-12 02:07:11,914 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2023-11-12 02:07:11,914 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 268 transitions, 3426 flow [2023-11-12 02:07:11,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 146.3846153846154) internal successors, (1903), 13 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:11,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:11,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:11,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-12 02:07:12,121 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:12,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1026045729, now seen corresponding path program 8 times [2023-11-12 02:07:12,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:12,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518887459] [2023-11-12 02:07:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:12,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:12,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:12,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518887459] [2023-11-12 02:07:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518887459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:12,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997313858] [2023-11-12 02:07:12,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:07:12,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:12,244 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:12,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:07:12,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:07:12,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:07:12,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:12,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:12,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:07:12,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997313858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:12,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:12,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-12 02:07:12,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188597770] [2023-11-12 02:07:12,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:12,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:07:12,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:07:12,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:07:12,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:12,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 268 transitions, 3426 flow. Second operand has 13 states, 13 states have (on average 146.23076923076923) internal successors, (1901), 13 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:12,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:12,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:12,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:13,230 INFO L124 PetriNetUnfolderBase]: 920/1611 cut-off events. [2023-11-12 02:07:13,230 INFO L125 PetriNetUnfolderBase]: For 10884/10884 co-relation queries the response was YES. [2023-11-12 02:07:13,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10254 conditions, 1611 events. 920/1611 cut-off events. For 10884/10884 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8569 event pairs, 109 based on Foata normal form. 16/1619 useless extension candidates. Maximal degree in co-relation 9893. Up to 769 conditions per place. [2023-11-12 02:07:13,254 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 162 selfloop transitions, 143 changer transitions 6/311 dead transitions. [2023-11-12 02:07:13,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 311 transitions, 4534 flow [2023-11-12 02:07:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:07:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:07:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2089 transitions. [2023-11-12 02:07:13,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44409013605442177 [2023-11-12 02:07:13,259 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2089 transitions. [2023-11-12 02:07:13,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2089 transitions. [2023-11-12 02:07:13,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:13,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2089 transitions. [2023-11-12 02:07:13,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 149.21428571428572) internal successors, (2089), 14 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:13,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 336.0) internal successors, (5040), 15 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:13,271 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 336.0) internal successors, (5040), 15 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:13,271 INFO L175 Difference]: Start difference. First operand has 131 places, 268 transitions, 3426 flow. Second operand 14 states and 2089 transitions. [2023-11-12 02:07:13,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 311 transitions, 4534 flow [2023-11-12 02:07:13,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 311 transitions, 4209 flow, removed 156 selfloop flow, removed 2 redundant places. [2023-11-12 02:07:13,379 INFO L231 Difference]: Finished difference. Result has 144 places, 267 transitions, 3401 flow [2023-11-12 02:07:13,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3401, PETRI_PLACES=144, PETRI_TRANSITIONS=267} [2023-11-12 02:07:13,381 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2023-11-12 02:07:13,381 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 267 transitions, 3401 flow [2023-11-12 02:07:13,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 146.23076923076923) internal successors, (1901), 13 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:13,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:13,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:13,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:13,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-12 02:07:13,593 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:13,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:13,594 INFO L85 PathProgramCache]: Analyzing trace with hash 515070997, now seen corresponding path program 9 times [2023-11-12 02:07:13,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:13,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10567874] [2023-11-12 02:07:13,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:13,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:13,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:13,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10567874] [2023-11-12 02:07:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10567874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:13,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654144515] [2023-11-12 02:07:13,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:07:13,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:13,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:13,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:13,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:07:13,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:07:13,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:07:13,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:13,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:14,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:14,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654144515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:14,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:14,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:07:14,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546772083] [2023-11-12 02:07:14,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:14,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:07:14,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:07:14,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:07:14,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:14,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 267 transitions, 3401 flow. Second operand has 15 states, 15 states have (on average 146.0) internal successors, (2190), 15 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:14,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:14,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:14,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:14,783 INFO L124 PetriNetUnfolderBase]: 964/1687 cut-off events. [2023-11-12 02:07:14,784 INFO L125 PetriNetUnfolderBase]: For 12260/12260 co-relation queries the response was YES. [2023-11-12 02:07:14,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11055 conditions, 1687 events. 964/1687 cut-off events. For 12260/12260 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9054 event pairs, 115 based on Foata normal form. 14/1693 useless extension candidates. Maximal degree in co-relation 10847. Up to 799 conditions per place. [2023-11-12 02:07:14,806 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 171 selfloop transitions, 152 changer transitions 11/334 dead transitions. [2023-11-12 02:07:14,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 334 transitions, 4895 flow [2023-11-12 02:07:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:07:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:07:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2379 transitions. [2023-11-12 02:07:14,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44252232142857145 [2023-11-12 02:07:14,812 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2379 transitions. [2023-11-12 02:07:14,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2379 transitions. [2023-11-12 02:07:14,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:14,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2379 transitions. [2023-11-12 02:07:14,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 148.6875) internal successors, (2379), 16 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:14,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:14,826 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:14,826 INFO L175 Difference]: Start difference. First operand has 144 places, 267 transitions, 3401 flow. Second operand 16 states and 2379 transitions. [2023-11-12 02:07:14,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 334 transitions, 4895 flow [2023-11-12 02:07:14,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 334 transitions, 4608 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-11-12 02:07:14,934 INFO L231 Difference]: Finished difference. Result has 152 places, 282 transitions, 3797 flow [2023-11-12 02:07:14,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3797, PETRI_PLACES=152, PETRI_TRANSITIONS=282} [2023-11-12 02:07:14,934 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 130 predicate places. [2023-11-12 02:07:14,934 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 282 transitions, 3797 flow [2023-11-12 02:07:14,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.0) internal successors, (2190), 15 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:14,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:14,935 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:14,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:15,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-12 02:07:15,136 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:15,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2051929642, now seen corresponding path program 10 times [2023-11-12 02:07:15,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:15,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019197081] [2023-11-12 02:07:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:15,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:15,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:15,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019197081] [2023-11-12 02:07:15,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019197081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:15,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309144127] [2023-11-12 02:07:15,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:07:15,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:15,286 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:15,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:07:15,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:07:15,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:07:15,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:15,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:15,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:15,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309144127] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:15,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:15,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:07:15,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517627051] [2023-11-12 02:07:15,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:15,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:07:15,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:15,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:07:15,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:07:15,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:15,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 282 transitions, 3797 flow. Second operand has 15 states, 15 states have (on average 146.06666666666666) internal successors, (2191), 15 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:15,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:15,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:15,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:16,375 INFO L124 PetriNetUnfolderBase]: 954/1675 cut-off events. [2023-11-12 02:07:16,375 INFO L125 PetriNetUnfolderBase]: For 16124/16124 co-relation queries the response was YES. [2023-11-12 02:07:16,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11585 conditions, 1675 events. 954/1675 cut-off events. For 16124/16124 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8922 event pairs, 220 based on Foata normal form. 92/1755 useless extension candidates. Maximal degree in co-relation 11273. Up to 1254 conditions per place. [2023-11-12 02:07:16,397 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 227 selfloop transitions, 114 changer transitions 8/349 dead transitions. [2023-11-12 02:07:16,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 349 transitions, 5339 flow [2023-11-12 02:07:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:07:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-12 02:07:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2677 transitions. [2023-11-12 02:07:16,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426256613756614 [2023-11-12 02:07:16,403 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2677 transitions. [2023-11-12 02:07:16,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2677 transitions. [2023-11-12 02:07:16,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:16,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2677 transitions. [2023-11-12 02:07:16,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 148.72222222222223) internal successors, (2677), 18 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:16,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 336.0) internal successors, (6384), 19 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:16,416 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 336.0) internal successors, (6384), 19 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:16,416 INFO L175 Difference]: Start difference. First operand has 152 places, 282 transitions, 3797 flow. Second operand 18 states and 2677 transitions. [2023-11-12 02:07:16,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 349 transitions, 5339 flow [2023-11-12 02:07:16,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 349 transitions, 5061 flow, removed 75 selfloop flow, removed 9 redundant places. [2023-11-12 02:07:16,560 INFO L231 Difference]: Finished difference. Result has 163 places, 310 transitions, 4351 flow [2023-11-12 02:07:16,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4351, PETRI_PLACES=163, PETRI_TRANSITIONS=310} [2023-11-12 02:07:16,562 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2023-11-12 02:07:16,562 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 310 transitions, 4351 flow [2023-11-12 02:07:16,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.06666666666666) internal successors, (2191), 15 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:16,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:16,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:16,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:16,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:16,768 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:16,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1292881565, now seen corresponding path program 11 times [2023-11-12 02:07:16,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:16,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777647193] [2023-11-12 02:07:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:16,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:16,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:16,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777647193] [2023-11-12 02:07:16,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777647193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:16,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816603758] [2023-11-12 02:07:16,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:07:16,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:16,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:16,898 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:16,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:07:17,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:07:17,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:07:17,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:17,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:17,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:17,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816603758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:17,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:17,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-12 02:07:17,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316358660] [2023-11-12 02:07:17,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:17,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:07:17,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:07:17,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:07:17,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:17,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 310 transitions, 4351 flow. Second operand has 13 states, 13 states have (on average 146.3846153846154) internal successors, (1903), 13 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:17,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:17,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:17,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:17,918 INFO L124 PetriNetUnfolderBase]: 1107/1908 cut-off events. [2023-11-12 02:07:17,918 INFO L125 PetriNetUnfolderBase]: For 20745/20745 co-relation queries the response was YES. [2023-11-12 02:07:17,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13887 conditions, 1908 events. 1107/1908 cut-off events. For 20745/20745 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 10230 event pairs, 259 based on Foata normal form. 48/1956 useless extension candidates. Maximal degree in co-relation 13691. Up to 1543 conditions per place. [2023-11-12 02:07:17,940 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 310 selfloop transitions, 105 changer transitions 3/418 dead transitions. [2023-11-12 02:07:17,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 418 transitions, 6807 flow [2023-11-12 02:07:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:07:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:07:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2388 transitions. [2023-11-12 02:07:17,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44419642857142855 [2023-11-12 02:07:17,952 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2388 transitions. [2023-11-12 02:07:17,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2388 transitions. [2023-11-12 02:07:17,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:17,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2388 transitions. [2023-11-12 02:07:17,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 149.25) internal successors, (2388), 16 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:17,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:17,964 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:17,965 INFO L175 Difference]: Start difference. First operand has 163 places, 310 transitions, 4351 flow. Second operand 16 states and 2388 transitions. [2023-11-12 02:07:17,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 418 transitions, 6807 flow [2023-11-12 02:07:18,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 418 transitions, 6357 flow, removed 182 selfloop flow, removed 6 redundant places. [2023-11-12 02:07:18,155 INFO L231 Difference]: Finished difference. Result has 179 places, 379 transitions, 5478 flow [2023-11-12 02:07:18,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5478, PETRI_PLACES=179, PETRI_TRANSITIONS=379} [2023-11-12 02:07:18,156 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2023-11-12 02:07:18,157 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 379 transitions, 5478 flow [2023-11-12 02:07:18,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 146.3846153846154) internal successors, (1903), 13 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:18,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:18,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:18,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:18,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-12 02:07:18,364 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:18,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2043541164, now seen corresponding path program 12 times [2023-11-12 02:07:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:18,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194563976] [2023-11-12 02:07:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:18,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:18,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194563976] [2023-11-12 02:07:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194563976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:18,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81111462] [2023-11-12 02:07:18,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:07:18,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:18,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:18,548 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:18,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:07:18,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:07:18,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:07:18,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:18,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:18,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:18,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81111462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:18,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:18,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:07:18,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907079448] [2023-11-12 02:07:18,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:18,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:07:18,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:07:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:07:19,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:19,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 379 transitions, 5478 flow. Second operand has 15 states, 15 states have (on average 146.13333333333333) internal successors, (2192), 15 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) [2023-11-12 02:07:19,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:19,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:19,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:20,060 INFO L124 PetriNetUnfolderBase]: 1269/2178 cut-off events. [2023-11-12 02:07:20,060 INFO L125 PetriNetUnfolderBase]: For 30751/30751 co-relation queries the response was YES. [2023-11-12 02:07:20,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17071 conditions, 2178 events. 1269/2178 cut-off events. For 30751/30751 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 12030 event pairs, 102 based on Foata normal form. 78/2256 useless extension candidates. Maximal degree in co-relation 16867. Up to 1066 conditions per place. [2023-11-12 02:07:20,086 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 339 selfloop transitions, 181 changer transitions 13/533 dead transitions. [2023-11-12 02:07:20,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 533 transitions, 9457 flow [2023-11-12 02:07:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:07:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-12 02:07:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3418 transitions. [2023-11-12 02:07:20,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442287784679089 [2023-11-12 02:07:20,093 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3418 transitions. [2023-11-12 02:07:20,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3418 transitions. [2023-11-12 02:07:20,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:20,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3418 transitions. [2023-11-12 02:07:20,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 148.6086956521739) internal successors, (3418), 23 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:20,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 336.0) internal successors, (8064), 24 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:20,111 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 336.0) internal successors, (8064), 24 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:20,111 INFO L175 Difference]: Start difference. First operand has 179 places, 379 transitions, 5478 flow. Second operand 23 states and 3418 transitions. [2023-11-12 02:07:20,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 533 transitions, 9457 flow [2023-11-12 02:07:20,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 533 transitions, 8579 flow, removed 418 selfloop flow, removed 3 redundant places. [2023-11-12 02:07:20,401 INFO L231 Difference]: Finished difference. Result has 212 places, 479 transitions, 7608 flow [2023-11-12 02:07:20,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=4706, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7608, PETRI_PLACES=212, PETRI_TRANSITIONS=479} [2023-11-12 02:07:20,402 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 190 predicate places. [2023-11-12 02:07:20,403 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 479 transitions, 7608 flow [2023-11-12 02:07:20,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.13333333333333) internal successors, (2192), 15 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) [2023-11-12 02:07:20,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:20,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:20,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:20,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-12 02:07:20,610 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:20,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1147096921, now seen corresponding path program 13 times [2023-11-12 02:07:20,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:20,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051988101] [2023-11-12 02:07:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:20,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:20,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:20,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051988101] [2023-11-12 02:07:20,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051988101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:20,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065916763] [2023-11-12 02:07:20,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:07:20,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:20,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:20,731 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:20,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:07:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:20,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:20,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:20,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:21,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065916763] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:21,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:21,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:07:21,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878143452] [2023-11-12 02:07:21,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:21,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:07:21,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:21,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:07:21,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:07:21,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:21,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 479 transitions, 7608 flow. Second operand has 15 states, 15 states have (on average 146.06666666666666) internal successors, (2191), 15 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:21,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:21,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:21,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:22,090 INFO L124 PetriNetUnfolderBase]: 1308/2267 cut-off events. [2023-11-12 02:07:22,090 INFO L125 PetriNetUnfolderBase]: For 47248/47248 co-relation queries the response was YES. [2023-11-12 02:07:22,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18978 conditions, 2267 events. 1308/2267 cut-off events. For 47248/47248 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12891 event pairs, 326 based on Foata normal form. 22/2289 useless extension candidates. Maximal degree in co-relation 18747. Up to 1858 conditions per place. [2023-11-12 02:07:22,116 INFO L140 encePairwiseOnDemand]: 330/336 looper letters, 415 selfloop transitions, 105 changer transitions 12/532 dead transitions. [2023-11-12 02:07:22,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 532 transitions, 9601 flow [2023-11-12 02:07:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:07:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-12 02:07:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2378 transitions. [2023-11-12 02:07:22,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44233630952380953 [2023-11-12 02:07:22,120 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2378 transitions. [2023-11-12 02:07:22,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2378 transitions. [2023-11-12 02:07:22,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:22,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2378 transitions. [2023-11-12 02:07:22,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 148.625) internal successors, (2378), 16 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:22,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:22,133 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 336.0) internal successors, (5712), 17 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:22,133 INFO L175 Difference]: Start difference. First operand has 212 places, 479 transitions, 7608 flow. Second operand 16 states and 2378 transitions. [2023-11-12 02:07:22,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 532 transitions, 9601 flow [2023-11-12 02:07:22,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 532 transitions, 8085 flow, removed 727 selfloop flow, removed 4 redundant places. [2023-11-12 02:07:22,595 INFO L231 Difference]: Finished difference. Result has 230 places, 495 transitions, 6906 flow [2023-11-12 02:07:22,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=6192, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6906, PETRI_PLACES=230, PETRI_TRANSITIONS=495} [2023-11-12 02:07:22,596 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 208 predicate places. [2023-11-12 02:07:22,596 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 495 transitions, 6906 flow [2023-11-12 02:07:22,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.06666666666666) internal successors, (2191), 15 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:22,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:22,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:22,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:22,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-12 02:07:22,802 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:22,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:22,802 INFO L85 PathProgramCache]: Analyzing trace with hash 611815734, now seen corresponding path program 14 times [2023-11-12 02:07:22,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:22,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899925153] [2023-11-12 02:07:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:22,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:22,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899925153] [2023-11-12 02:07:22,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899925153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:22,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510417107] [2023-11-12 02:07:22,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:07:22,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:22,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:22,956 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:22,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadd5c17-c81b-4ddf-ba2d-2316a6435944/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:07:23,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:07:23,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:07:23,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:07:23,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:23,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:23,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510417107] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:23,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:23,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-12 02:07:23,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321869083] [2023-11-12 02:07:23,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:23,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:07:23,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:23,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:07:23,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:07:23,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 336 [2023-11-12 02:07:23,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 495 transitions, 6906 flow. Second operand has 11 states, 11 states have (on average 146.45454545454547) internal successors, (1611), 11 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:23,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:23,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 336 [2023-11-12 02:07:23,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand