./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/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_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/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_ad473ec1-ffe5-4a26-929a-b7727ab38560/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 a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:34:03,805 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:34:03,931 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:34:03,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:34:03,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:34:03,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:34:03,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:34:03,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:34:03,982 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:34:03,987 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:34:03,987 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:34:03,988 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:34:03,988 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:34:03,990 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:34:03,991 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:34:03,991 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:34:03,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:34:03,992 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:34:03,992 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:34:03,993 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:34:03,993 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:34:03,994 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:34:03,994 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:34:03,994 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:34:03,995 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:34:03,996 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:34:03,996 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:34:03,997 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:34:03,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:34:03,997 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:34:03,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:34:03,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:34:03,999 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:34:03,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:34:04,000 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:34:04,000 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:34:04,001 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:34:04,001 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:34:04,001 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:34:04,001 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_ad473ec1-ffe5-4a26-929a-b7727ab38560/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 [2023-11-12 02:34:04,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:34:04,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:34:04,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:34:04,342 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:34:04,342 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:34:04,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-11-12 02:34:07,551 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:34:07,932 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:34:07,940 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-11-12 02:34:07,964 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl/data/9246ca38b/39a458f1f13d4450b260c42f853f2c1b/FLAGd2d347b02 [2023-11-12 02:34:08,003 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl/data/9246ca38b/39a458f1f13d4450b260c42f853f2c1b [2023-11-12 02:34:08,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:34:08,010 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:34:08,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:34:08,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:34:08,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:34:08,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76abe55d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08, skipping insertion in model container [2023-11-12 02:34:08,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,112 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:34:08,558 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_ad473ec1-ffe5-4a26-929a-b7727ab38560/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2023-11-12 02:34:08,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:34:08,578 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:34:08,616 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_ad473ec1-ffe5-4a26-929a-b7727ab38560/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2023-11-12 02:34:08,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:34:08,658 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:34:08,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08 WrapperNode [2023-11-12 02:34:08,659 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:34:08,660 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:34:08,660 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:34:08,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:34:08,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,701 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,728 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 82 [2023-11-12 02:34:08,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:34:08,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:34:08,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:34:08,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:34:08,743 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,770 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,776 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,785 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,794 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:34:08,795 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:34:08,795 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:34:08,795 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:34:08,796 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (1/1) ... [2023-11-12 02:34:08,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:34:08,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:08,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:34:08,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad473ec1-ffe5-4a26-929a-b7727ab38560/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:34:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:34:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 02:34:08,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 02:34:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:34:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:34:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:34:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:34:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:34:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:34:08,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:34:08,871 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 02:34:09,011 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:34:09,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:34:09,202 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:34:09,287 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:34:09,287 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:34:09,290 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:34:09 BoogieIcfgContainer [2023-11-12 02:34:09,290 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:34:09,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:34:09,293 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:34:09,296 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:34:09,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:34:08" (1/3) ... [2023-11-12 02:34:09,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc9a6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:34:09, skipping insertion in model container [2023-11-12 02:34:09,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:08" (2/3) ... [2023-11-12 02:34:09,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc9a6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:34:09, skipping insertion in model container [2023-11-12 02:34:09,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:34:09" (3/3) ... [2023-11-12 02:34:09,300 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2023-11-12 02:34:09,310 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:34:09,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:34:09,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:34:09,322 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:34:09,389 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:34:09,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 75 transitions, 154 flow [2023-11-12 02:34:09,482 INFO L124 PetriNetUnfolderBase]: 7/86 cut-off events. [2023-11-12 02:34:09,483 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:34:09,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 86 events. 7/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 98 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2023-11-12 02:34:09,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 75 transitions, 154 flow [2023-11-12 02:34:09,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 75 transitions, 154 flow [2023-11-12 02:34:09,499 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:34:09,510 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 75 transitions, 154 flow [2023-11-12 02:34:09,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 75 transitions, 154 flow [2023-11-12 02:34:09,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 75 transitions, 154 flow [2023-11-12 02:34:09,546 INFO L124 PetriNetUnfolderBase]: 7/86 cut-off events. [2023-11-12 02:34:09,547 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:34:09,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 86 events. 7/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 98 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2023-11-12 02:34:09,550 INFO L119 LiptonReduction]: Number of co-enabled transitions 1316 [2023-11-12 02:34:11,383 INFO L134 LiptonReduction]: Checked pairs total: 1495 [2023-11-12 02:34:11,384 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-11-12 02:34:11,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:34:11,432 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;@67eee383, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:34:11,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:34:11,439 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:34:11,440 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-11-12 02:34:11,440 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:34:11,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:34:11,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:34:11,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:11,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1309525895, now seen corresponding path program 1 times [2023-11-12 02:34:11,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:11,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071901634] [2023-11-12 02:34:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:34:11,608 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:34:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:34:11,682 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:34:11,684 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:34:11,685 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-12 02:34:11,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-12 02:34:11,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-12 02:34:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:34:11,689 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 02:34:11,696 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:34:11,696 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:34:11,752 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:34:11,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 123 transitions, 256 flow [2023-11-12 02:34:11,870 INFO L124 PetriNetUnfolderBase]: 13/147 cut-off events. [2023-11-12 02:34:11,870 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:34:11,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 13/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 330 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2023-11-12 02:34:11,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 123 transitions, 256 flow [2023-11-12 02:34:11,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 123 transitions, 256 flow [2023-11-12 02:34:11,876 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:34:11,876 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 123 transitions, 256 flow [2023-11-12 02:34:11,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 123 transitions, 256 flow [2023-11-12 02:34:11,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 123 transitions, 256 flow [2023-11-12 02:34:11,909 INFO L124 PetriNetUnfolderBase]: 13/147 cut-off events. [2023-11-12 02:34:11,909 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:34:11,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 13/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 330 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2023-11-12 02:34:11,918 INFO L119 LiptonReduction]: Number of co-enabled transitions 7144 [2023-11-12 02:34:13,696 INFO L134 LiptonReduction]: Checked pairs total: 16803 [2023-11-12 02:34:13,697 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-11-12 02:34:13,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:34:13,701 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;@67eee383, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:34:13,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:34:13,705 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:34:13,705 INFO L124 PetriNetUnfolderBase]: 1/25 cut-off events. [2023-11-12 02:34:13,706 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:34:13,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:34:13,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:13,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-12 02:34:13,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:13,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1756423020, now seen corresponding path program 1 times [2023-11-12 02:34:13,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:13,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299490360] [2023-11-12 02:34:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:13,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:13,920 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 02:34:13,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:13,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299490360] [2023-11-12 02:34:13,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299490360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:13,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:13,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:34:13,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290089075] [2023-11-12 02:34:13,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:13,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:34:13,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:13,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:34:13,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:34:13,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 218 [2023-11-12 02:34:13,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 02:34:13,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:34:13,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 218 [2023-11-12 02:34:13,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:34:14,167 INFO L124 PetriNetUnfolderBase]: 409/845 cut-off events. [2023-11-12 02:34:14,167 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-12 02:34:14,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1583 conditions, 845 events. 409/845 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4559 event pairs, 332 based on Foata normal form. 22/782 useless extension candidates. Maximal degree in co-relation 1194. Up to 641 conditions per place. [2023-11-12 02:34:14,176 INFO L140 encePairwiseOnDemand]: 211/218 looper letters, 35 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-12 02:34:14,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 193 flow [2023-11-12 02:34:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:34:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:34:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-11-12 02:34:14,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198776758409785 [2023-11-12 02:34:14,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-11-12 02:34:14,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-11-12 02:34:14,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:34:14,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-11-12 02:34:14,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:34:14,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 02:34:14,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 02:34:14,211 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 110 flow. Second operand 3 states and 340 transitions. [2023-11-12 02:34:14,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 193 flow [2023-11-12 02:34:14,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:34:14,218 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 96 flow [2023-11-12 02:34:14,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-12 02:34:14,224 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-11-12 02:34:14,224 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 96 flow [2023-11-12 02:34:14,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 02:34:14,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:34:14,225 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:34:14,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:34:14,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-12 02:34:14,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:14,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1709478062, now seen corresponding path program 1 times [2023-11-12 02:34:14,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:14,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926037167] [2023-11-12 02:34:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:14,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:34:14,246 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:34:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:34:14,263 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:34:14,263 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:34:14,263 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-12 02:34:14,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-12 02:34:14,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-12 02:34:14,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-12 02:34:14,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:34:14,265 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:34:14,265 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:34:14,266 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:34:14,298 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:34:14,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 171 transitions, 360 flow [2023-11-12 02:34:14,335 INFO L124 PetriNetUnfolderBase]: 19/208 cut-off events. [2023-11-12 02:34:14,335 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:34:14,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 19/208 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 608 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-11-12 02:34:14,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 171 transitions, 360 flow [2023-11-12 02:34:14,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 171 transitions, 360 flow [2023-11-12 02:34:14,340 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:34:14,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 171 transitions, 360 flow [2023-11-12 02:34:14,340 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 171 transitions, 360 flow [2023-11-12 02:34:14,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 171 transitions, 360 flow [2023-11-12 02:34:14,372 INFO L124 PetriNetUnfolderBase]: 19/208 cut-off events. [2023-11-12 02:34:14,372 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:34:14,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 19/208 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 608 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-11-12 02:34:14,386 INFO L119 LiptonReduction]: Number of co-enabled transitions 17484 [2023-11-12 02:34:16,455 INFO L134 LiptonReduction]: Checked pairs total: 43928 [2023-11-12 02:34:16,455 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-11-12 02:34:16,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:34:16,458 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;@67eee383, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:34:16,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:34:16,462 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:34:16,462 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-11-12 02:34:16,462 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:34:16,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:34:16,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:16,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:34:16,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1691409805, now seen corresponding path program 1 times [2023-11-12 02:34:16,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:16,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767584082] [2023-11-12 02:34:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:16,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:16,526 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 02:34:16,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:16,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767584082] [2023-11-12 02:34:16,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767584082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:16,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:16,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:34:16,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702005256] [2023-11-12 02:34:16,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:16,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:34:16,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:34:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:34:16,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 304 [2023-11-12 02:34:16,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 160 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 02:34:16,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:34:16,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 304 [2023-11-12 02:34:16,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:34:19,054 INFO L124 PetriNetUnfolderBase]: 11339/17015 cut-off events. [2023-11-12 02:34:19,055 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2023-11-12 02:34:19,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33384 conditions, 17015 events. 11339/17015 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 113669 event pairs, 9677 based on Foata normal form. 363/15029 useless extension candidates. Maximal degree in co-relation 8484. Up to 15703 conditions per place. [2023-11-12 02:34:19,211 INFO L140 encePairwiseOnDemand]: 298/304 looper letters, 42 selfloop transitions, 0 changer transitions 0/64 dead transitions. [2023-11-12 02:34:19,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 230 flow [2023-11-12 02:34:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:34:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:34:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 332 transitions. [2023-11-12 02:34:19,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5460526315789473 [2023-11-12 02:34:19,217 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 332 transitions. [2023-11-12 02:34:19,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 332 transitions. [2023-11-12 02:34:19,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:34:19,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 332 transitions. [2023-11-12 02:34:19,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 02:34:19,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 02:34:19,223 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 02:34:19,224 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 160 flow. Second operand 2 states and 332 transitions. [2023-11-12 02:34:19,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 230 flow [2023-11-12 02:34:19,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 228 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-12 02:34:19,229 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 144 flow [2023-11-12 02:34:19,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2023-11-12 02:34:19,231 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-11-12 02:34:19,233 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 144 flow [2023-11-12 02:34:19,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 02:34:19,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:34:19,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:19,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:34:19,235 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:34:19,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1320567844, now seen corresponding path program 1 times [2023-11-12 02:34:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:19,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19865245] [2023-11-12 02:34:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:19,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:34:19,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:19,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19865245] [2023-11-12 02:34:19,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19865245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:19,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:19,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:34:19,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691404722] [2023-11-12 02:34:19,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:19,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:34:19,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:34:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:34:19,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 304 [2023-11-12 02:34:19,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 02:34:19,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:34:19,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 304 [2023-11-12 02:34:19,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:34:21,539 INFO L124 PetriNetUnfolderBase]: 11003/16382 cut-off events. [2023-11-12 02:34:21,539 INFO L125 PetriNetUnfolderBase]: For 577/577 co-relation queries the response was YES. [2023-11-12 02:34:21,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32260 conditions, 16382 events. 11003/16382 cut-off events. For 577/577 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 107870 event pairs, 8910 based on Foata normal form. 336/14422 useless extension candidates. Maximal degree in co-relation 32254. Up to 14188 conditions per place. [2023-11-12 02:34:21,645 INFO L140 encePairwiseOnDemand]: 302/304 looper letters, 66 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-11-12 02:34:21,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 89 transitions, 333 flow [2023-11-12 02:34:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:34:21,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:34:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-11-12 02:34:21,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252192982456141 [2023-11-12 02:34:21,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-11-12 02:34:21,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-11-12 02:34:21,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:34:21,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-11-12 02:34:21,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states 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 02:34:21,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 02:34:21,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states 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 02:34:21,666 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 144 flow. Second operand 3 states and 479 transitions. [2023-11-12 02:34:21,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 89 transitions, 333 flow [2023-11-12 02:34:21,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:34:21,672 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 144 flow [2023-11-12 02:34:21,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-11-12 02:34:21,674 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-11-12 02:34:21,675 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 144 flow [2023-11-12 02:34:21,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 02:34:21,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:34:21,679 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:34:21,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:34:21,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:34:21,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:21,680 INFO L85 PathProgramCache]: Analyzing trace with hash 352451826, now seen corresponding path program 1 times [2023-11-12 02:34:21,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:21,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340219109] [2023-11-12 02:34:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:34:21,713 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:34:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:34:21,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:34:21,739 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:34:21,740 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 02:34:21,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 02:34:21,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-12 02:34:21,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 02:34:21,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 02:34:21,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:34:21,741 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:34:21,742 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:34:21,742 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:34:21,784 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:34:21,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 219 transitions, 466 flow [2023-11-12 02:34:21,834 INFO L124 PetriNetUnfolderBase]: 25/269 cut-off events. [2023-11-12 02:34:21,834 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:34:21,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 269 events. 25/269 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 875 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 216. Up to 10 conditions per place. [2023-11-12 02:34:21,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 219 transitions, 466 flow [2023-11-12 02:34:21,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 219 transitions, 466 flow [2023-11-12 02:34:21,841 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:34:21,841 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 219 transitions, 466 flow [2023-11-12 02:34:21,841 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 219 transitions, 466 flow [2023-11-12 02:34:21,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 219 transitions, 466 flow [2023-11-12 02:34:21,878 INFO L124 PetriNetUnfolderBase]: 25/269 cut-off events. [2023-11-12 02:34:21,879 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:34:21,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 269 events. 25/269 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 875 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 216. Up to 10 conditions per place. [2023-11-12 02:34:21,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 32336 [2023-11-12 02:34:24,567 INFO L134 LiptonReduction]: Checked pairs total: 80872 [2023-11-12 02:34:24,567 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-11-12 02:34:24,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:34:24,570 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;@67eee383, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:34:24,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-12 02:34:24,575 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:34:24,575 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2023-11-12 02:34:24,576 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:34:24,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:34:24,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:24,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-12 02:34:24,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:24,577 INFO L85 PathProgramCache]: Analyzing trace with hash 740070406, now seen corresponding path program 1 times [2023-11-12 02:34:24,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:24,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249235456] [2023-11-12 02:34:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:24,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:24,601 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 02:34:24,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:24,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249235456] [2023-11-12 02:34:24,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249235456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:24,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:24,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:34:24,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579675259] [2023-11-12 02:34:24,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:24,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:34:24,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:24,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:34:24,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:34:24,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 391 [2023-11-12 02:34:24,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 216 flow. Second operand has 2 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 02:34:24,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:34:24,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 391 [2023-11-12 02:34:24,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:34:46,609 INFO L124 PetriNetUnfolderBase]: 142455/194223 cut-off events. [2023-11-12 02:34:46,609 INFO L125 PetriNetUnfolderBase]: For 16567/16567 co-relation queries the response was YES. [2023-11-12 02:34:46,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384701 conditions, 194223 events. 142455/194223 cut-off events. For 16567/16567 co-relation queries the response was YES. Maximal size of possible extension queue 4345. Compared 1417550 event pairs, 125439 based on Foata normal form. 2880/174846 useless extension candidates. Maximal degree in co-relation 30513. Up to 182761 conditions per place. [2023-11-12 02:34:48,212 INFO L140 encePairwiseOnDemand]: 381/391 looper letters, 50 selfloop transitions, 0 changer transitions 0/80 dead transitions. [2023-11-12 02:34:48,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 80 transitions, 288 flow [2023-11-12 02:34:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:34:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:34:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 422 transitions. [2023-11-12 02:34:48,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396419437340153 [2023-11-12 02:34:48,218 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 422 transitions. [2023-11-12 02:34:48,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 422 transitions. [2023-11-12 02:34:48,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:34:48,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 422 transitions. [2023-11-12 02:34:48,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 02:34:48,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 391.0) internal successors, (1173), 3 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states 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 02:34:48,225 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 391.0) internal successors, (1173), 3 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states 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 02:34:48,225 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 216 flow. Second operand 2 states and 422 transitions. [2023-11-12 02:34:48,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 80 transitions, 288 flow [2023-11-12 02:34:48,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 80 transitions, 282 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-12 02:34:48,245 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 182 flow [2023-11-12 02:34:48,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2023-11-12 02:34:48,248 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -8 predicate places. [2023-11-12 02:34:48,248 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 182 flow [2023-11-12 02:34:48,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 02:34:48,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:34:48,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:34:48,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:34:48,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-12 02:34:48,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1325465977, now seen corresponding path program 1 times [2023-11-12 02:34:48,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:48,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198081661] [2023-11-12 02:34:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:48,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:34:48,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:48,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198081661] [2023-11-12 02:34:48,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198081661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:48,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:48,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:34:48,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371179619] [2023-11-12 02:34:48,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:48,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:34:48,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:48,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:34:48,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:34:48,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 391 [2023-11-12 02:34:48,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 02:34:48,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:34:48,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 391 [2023-11-12 02:34:48,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand