./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe001_power.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe001_power.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67d3e2c6779f32015be5c9fe966e6a739e1c762dcde7f287ad383839eb490e84 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:58:19,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:58:19,730 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:58:19,737 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:58:19,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:58:19,766 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:58:19,767 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:58:19,769 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:58:19,770 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:58:19,772 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:58:19,772 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:58:19,773 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:58:19,774 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:58:19,777 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:58:19,778 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:58:19,778 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:58:19,780 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:58:19,782 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:58:19,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:58:19,783 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:58:19,783 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:58:19,784 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:58:19,784 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:58:19,785 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:58:19,785 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:58:19,786 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:58:19,786 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:58:19,787 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:58:19,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:58:19,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:58:19,789 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:58:19,789 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:58:19,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:19,790 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:58:19,790 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:58:19,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:58:19,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:58:19,791 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:58:19,791 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:58:19,791 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:58:19,792 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:58:19,792 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_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67d3e2c6779f32015be5c9fe966e6a739e1c762dcde7f287ad383839eb490e84 [2023-11-26 11:58:20,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:58:20,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:58:20,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:58:20,081 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:58:20,082 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:58:20,083 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread-wmm/safe001_power.oepc.i [2023-11-26 11:58:23,245 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:58:23,528 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:58:23,529 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/sv-benchmarks/c/pthread-wmm/safe001_power.oepc.i [2023-11-26 11:58:23,550 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/data/4bfa064ba/2ee12f4ec91e4ba98467953394274d2d/FLAGe51c0ca02 [2023-11-26 11:58:23,565 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/data/4bfa064ba/2ee12f4ec91e4ba98467953394274d2d [2023-11-26 11:58:23,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:58:23,570 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:58:23,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:23,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:58:23,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:58:23,578 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,579 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c8764fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:23, skipping insertion in model container [2023-11-26 11:58:23,579 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:23" (1/1) ... [2023-11-26 11:58:23,660 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:58:24,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:24,214 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:58:24,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:24,407 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:24,408 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:58:24,416 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:58:24,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24 WrapperNode [2023-11-26 11:58:24,416 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:24,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:24,418 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:58:24,418 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:58:24,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,471 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,520 INFO L138 Inliner]: procedures = 176, calls = 85, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2023-11-26 11:58:24,521 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:24,522 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:58:24,522 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:58:24,522 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:58:24,534 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,551 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,596 INFO L175 MemorySlicer]: Split 35 memory accesses to 5 slices as follows [2, 1, 30, 1, 1]. 86 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1, 0, 0]. The 14 writes are split as follows [0, 1, 11, 1, 1]. [2023-11-26 11:58:24,599 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,618 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,641 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,647 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:58:24,649 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:58:24,650 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:58:24,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:58:24,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (1/1) ... [2023-11-26 11:58:24,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:24,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:24,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:58:24,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34c9d964-8edb-4214-825c-7d2e24994511/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:58:24,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:58:24,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:58:24,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:58:24,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:58:24,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:58:24,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:58:24,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:58:24,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:58:24,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:58:24,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:58:24,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:58:24,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:58:24,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:58:24,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:58:24,742 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-26 11:58:24,742 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-26 11:58:24,743 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-26 11:58:24,743 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-26 11:58:24,744 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-26 11:58:24,744 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-26 11:58:24,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:58:24,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:58:24,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:58:24,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:58:24,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:58:24,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:58:24,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:58:24,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:58:24,749 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:58:24,975 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:58:24,977 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:58:25,853 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:58:26,882 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:58:26,882 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 11:58:26,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:26 BoogieIcfgContainer [2023-11-26 11:58:26,883 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:58:26,889 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:58:26,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:58:26,892 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:58:26,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:58:23" (1/3) ... [2023-11-26 11:58:26,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a502a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:26, skipping insertion in model container [2023-11-26 11:58:26,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:24" (2/3) ... [2023-11-26 11:58:26,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a502a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:26, skipping insertion in model container [2023-11-26 11:58:26,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:26" (3/3) ... [2023-11-26 11:58:26,899 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.oepc.i [2023-11-26 11:58:26,921 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:58:26,921 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 66 error locations. [2023-11-26 11:58:26,921 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:58:27,116 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 11:58:27,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 110 transitions, 232 flow [2023-11-26 11:58:27,235 INFO L124 PetriNetUnfolderBase]: 2/107 cut-off events. [2023-11-26 11:58:27,235 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:58:27,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 107 events. 2/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 451 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-11-26 11:58:27,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 110 transitions, 232 flow [2023-11-26 11:58:27,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 107 transitions, 223 flow [2023-11-26 11:58:27,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:58:27,282 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@50ae8f05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:58:27,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 109 error locations. [2023-11-26 11:58:27,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:58:27,286 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 11:58:27,286 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:58:27,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:27,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:58:27,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:27,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash 33321, now seen corresponding path program 1 times [2023-11-26 11:58:27,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:27,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249912056] [2023-11-26 11:58:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:27,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:27,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:27,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249912056] [2023-11-26 11:58:27,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249912056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:27,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:27,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:58:27,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56511884] [2023-11-26 11:58:27,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:27,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:27,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:27,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 110 [2023-11-26 11:58:27,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 107 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:27,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:27,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 110 [2023-11-26 11:58:27,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:37,914 INFO L124 PetriNetUnfolderBase]: 28514/43016 cut-off events. [2023-11-26 11:58:37,914 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-26 11:58:38,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82809 conditions, 43016 events. 28514/43016 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 3457. Compared 365615 event pairs, 25104 based on Foata normal form. 1300/20790 useless extension candidates. Maximal degree in co-relation 82795. Up to 34966 conditions per place. [2023-11-26 11:58:38,305 INFO L140 encePairwiseOnDemand]: 71/110 looper letters, 71 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-26 11:58:38,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 94 transitions, 343 flow [2023-11-26 11:58:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:58:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-11-26 11:58:38,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242424242424243 [2023-11-26 11:58:38,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-11-26 11:58:38,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-11-26 11:58:38,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:38,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-11-26 11:58:38,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:38,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:38,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:38,345 INFO L175 Difference]: Start difference. First operand has 115 places, 107 transitions, 223 flow. Second operand 3 states and 206 transitions. [2023-11-26 11:58:38,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 94 transitions, 343 flow [2023-11-26 11:58:38,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 94 transitions, 340 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:58:38,359 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 148 flow [2023-11-26 11:58:38,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-11-26 11:58:38,367 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -37 predicate places. [2023-11-26 11:58:38,367 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 148 flow [2023-11-26 11:58:38,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:38,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:38,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:58:38,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:58:38,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:38,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:38,370 INFO L85 PathProgramCache]: Analyzing trace with hash 33322, now seen corresponding path program 1 times [2023-11-26 11:58:38,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:38,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14970107] [2023-11-26 11:58:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:38,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:38,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14970107] [2023-11-26 11:58:38,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14970107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:38,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:38,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:58:38,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774580531] [2023-11-26 11:58:38,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:38,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:38,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:38,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:38,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 110 [2023-11-26 11:58:38,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:38,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:38,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 110 [2023-11-26 11:58:38,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:46,418 INFO L124 PetriNetUnfolderBase]: 28514/43015 cut-off events. [2023-11-26 11:58:46,418 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-26 11:58:46,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83456 conditions, 43015 events. 28514/43015 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 3457. Compared 365672 event pairs, 25104 based on Foata normal form. 1/19490 useless extension candidates. Maximal degree in co-relation 83445. Up to 34965 conditions per place. [2023-11-26 11:58:46,730 INFO L140 encePairwiseOnDemand]: 107/110 looper letters, 70 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-26 11:58:46,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 340 flow [2023-11-26 11:58:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:58:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-26 11:58:46,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2023-11-26 11:58:46,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-26 11:58:46,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-26 11:58:46,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:46,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-26 11:58:46,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:46,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:46,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:46,747 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 148 flow. Second operand 3 states and 148 transitions. [2023-11-26 11:58:46,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 340 flow [2023-11-26 11:58:47,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:58:47,095 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 146 flow [2023-11-26 11:58:47,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-11-26 11:58:47,096 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -38 predicate places. [2023-11-26 11:58:47,097 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 146 flow [2023-11-26 11:58:47,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:47,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:47,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:58:47,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:58:47,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:47,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash 993794986, now seen corresponding path program 1 times [2023-11-26 11:58:47,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:47,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057683665] [2023-11-26 11:58:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:47,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:47,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:47,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057683665] [2023-11-26 11:58:47,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057683665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:47,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:47,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:47,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253237291] [2023-11-26 11:58:47,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:47,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:58:47,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:47,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:58:47,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:58:47,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 110 [2023-11-26 11:58:47,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:47,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:47,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 110 [2023-11-26 11:58:47,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:50,282 INFO L124 PetriNetUnfolderBase]: 10405/16147 cut-off events. [2023-11-26 11:58:50,282 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-11-26 11:58:50,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31264 conditions, 16147 events. 10405/16147 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 1205. Compared 127092 event pairs, 8045 based on Foata normal form. 0/9165 useless extension candidates. Maximal degree in co-relation 31252. Up to 10483 conditions per place. [2023-11-26 11:58:50,405 INFO L140 encePairwiseOnDemand]: 97/110 looper letters, 60 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-11-26 11:58:50,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 82 transitions, 298 flow [2023-11-26 11:58:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:58:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-26 11:58:50,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2023-11-26 11:58:50,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-26 11:58:50,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-26 11:58:50,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:50,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-26 11:58:50,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:50,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:50,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:50,415 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 146 flow. Second operand 3 states and 148 transitions. [2023-11-26 11:58:50,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 82 transitions, 298 flow [2023-11-26 11:58:50,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:58:50,448 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 158 flow [2023-11-26 11:58:50,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-11-26 11:58:50,450 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -40 predicate places. [2023-11-26 11:58:50,451 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 158 flow [2023-11-26 11:58:50,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:50,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:50,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:58:50,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:58:50,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:50,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash 993794987, now seen corresponding path program 1 times [2023-11-26 11:58:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:50,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136501216] [2023-11-26 11:58:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:50,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:50,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:50,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136501216] [2023-11-26 11:58:50,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136501216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:50,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:50,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:58:50,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755918599] [2023-11-26 11:58:50,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:50,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:50,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:50,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:50,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 110 [2023-11-26 11:58:50,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:50,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:50,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 110 [2023-11-26 11:58:50,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:51,672 INFO L124 PetriNetUnfolderBase]: 2242/3685 cut-off events. [2023-11-26 11:58:51,672 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2023-11-26 11:58:51,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7725 conditions, 3685 events. 2242/3685 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25305 event pairs, 2242 based on Foata normal form. 0/3363 useless extension candidates. Maximal degree in co-relation 7713. Up to 3317 conditions per place. [2023-11-26 11:58:51,698 INFO L140 encePairwiseOnDemand]: 98/110 looper letters, 32 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-26 11:58:51,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 202 flow [2023-11-26 11:58:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:58:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-26 11:58:51,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696969696969697 [2023-11-26 11:58:51,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-26 11:58:51,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-26 11:58:51,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:51,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-26 11:58:51,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:51,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:51,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:51,704 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 158 flow. Second operand 3 states and 122 transitions. [2023-11-26 11:58:51,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 202 flow [2023-11-26 11:58:51,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:58:51,709 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 134 flow [2023-11-26 11:58:51,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-11-26 11:58:51,710 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -51 predicate places. [2023-11-26 11:58:51,710 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 134 flow [2023-11-26 11:58:51,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:51,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:51,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:58:51,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:58:51,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:51,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash 993791696, now seen corresponding path program 1 times [2023-11-26 11:58:51,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:51,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516506875] [2023-11-26 11:58:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:51,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:51,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:51,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516506875] [2023-11-26 11:58:51,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516506875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:51,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:51,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:51,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602982384] [2023-11-26 11:58:51,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:51,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:51,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:51,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:51,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:51,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 110 [2023-11-26 11:58:51,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:51,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:51,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 110 [2023-11-26 11:58:51,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:52,632 INFO L124 PetriNetUnfolderBase]: 2244/3684 cut-off events. [2023-11-26 11:58:52,633 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-11-26 11:58:52,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7669 conditions, 3684 events. 2244/3684 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25252 event pairs, 1424 based on Foata normal form. 0/3368 useless extension candidates. Maximal degree in co-relation 7662. Up to 1748 conditions per place. [2023-11-26 11:58:52,659 INFO L140 encePairwiseOnDemand]: 107/110 looper letters, 41 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-26 11:58:52,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 62 transitions, 236 flow [2023-11-26 11:58:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:58:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2023-11-26 11:58:52,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3515151515151515 [2023-11-26 11:58:52,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2023-11-26 11:58:52,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2023-11-26 11:58:52,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:52,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2023-11-26 11:58:52,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:52,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:52,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:52,664 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 134 flow. Second operand 3 states and 116 transitions. [2023-11-26 11:58:52,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 62 transitions, 236 flow [2023-11-26 11:58:52,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 235 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:58:52,666 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 135 flow [2023-11-26 11:58:52,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-11-26 11:58:52,667 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -51 predicate places. [2023-11-26 11:58:52,667 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 135 flow [2023-11-26 11:58:52,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:52,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:52,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:58:52,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:58:52,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:52,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:52,668 INFO L85 PathProgramCache]: Analyzing trace with hash 993791697, now seen corresponding path program 1 times [2023-11-26 11:58:52,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:52,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663907524] [2023-11-26 11:58:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:52,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:52,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663907524] [2023-11-26 11:58:52,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663907524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:52,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:52,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:52,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221127425] [2023-11-26 11:58:52,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:52,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:52,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:52,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:52,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:52,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 110 [2023-11-26 11:58:52,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:52,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:52,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 110 [2023-11-26 11:58:52,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:53,591 INFO L124 PetriNetUnfolderBase]: 2242/3679 cut-off events. [2023-11-26 11:58:53,592 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-11-26 11:58:53,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7722 conditions, 3679 events. 2242/3679 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25354 event pairs, 1424 based on Foata normal form. 3/3367 useless extension candidates. Maximal degree in co-relation 7715. Up to 1743 conditions per place. [2023-11-26 11:58:53,620 INFO L140 encePairwiseOnDemand]: 107/110 looper letters, 40 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-26 11:58:53,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 235 flow [2023-11-26 11:58:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:58:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2023-11-26 11:58:53,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2023-11-26 11:58:53,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2023-11-26 11:58:53,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2023-11-26 11:58:53,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:53,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2023-11-26 11:58:53,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:53,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:53,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:53,626 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 135 flow. Second operand 3 states and 118 transitions. [2023-11-26 11:58:53,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 235 flow [2023-11-26 11:58:53,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:58:53,630 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 133 flow [2023-11-26 11:58:53,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2023-11-26 11:58:53,631 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -52 predicate places. [2023-11-26 11:58:53,631 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 133 flow [2023-11-26 11:58:53,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:53,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:53,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:53,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:58:53,633 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:53,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash 839970266, now seen corresponding path program 1 times [2023-11-26 11:58:53,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:53,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110044431] [2023-11-26 11:58:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:53,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:53,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:53,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110044431] [2023-11-26 11:58:53,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110044431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:53,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:53,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:53,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223653584] [2023-11-26 11:58:53,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:53,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:53,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:53,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:53,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:53,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 110 [2023-11-26 11:58:53,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:53,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:53,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 110 [2023-11-26 11:58:53,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:54,517 INFO L124 PetriNetUnfolderBase]: 2259/3684 cut-off events. [2023-11-26 11:58:54,517 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2023-11-26 11:58:54,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7756 conditions, 3684 events. 2259/3684 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25291 event pairs, 1236 based on Foata normal form. 0/3386 useless extension candidates. Maximal degree in co-relation 7749. Up to 1747 conditions per place. [2023-11-26 11:58:54,541 INFO L140 encePairwiseOnDemand]: 107/110 looper letters, 41 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-26 11:58:54,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 235 flow [2023-11-26 11:58:54,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:58:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2023-11-26 11:58:54,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3515151515151515 [2023-11-26 11:58:54,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2023-11-26 11:58:54,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2023-11-26 11:58:54,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:54,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2023-11-26 11:58:54,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:54,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:54,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:54,552 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 133 flow. Second operand 3 states and 116 transitions. [2023-11-26 11:58:54,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 235 flow [2023-11-26 11:58:54,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:58:54,555 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 131 flow [2023-11-26 11:58:54,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2023-11-26 11:58:54,556 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -53 predicate places. [2023-11-26 11:58:54,557 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 131 flow [2023-11-26 11:58:54,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:54,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:54,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:54,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:58:54,558 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:54,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash 839970267, now seen corresponding path program 1 times [2023-11-26 11:58:54,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:54,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491779972] [2023-11-26 11:58:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:54,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:54,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:54,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491779972] [2023-11-26 11:58:54,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491779972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:54,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:54,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:54,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234925318] [2023-11-26 11:58:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:54,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:54,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:54,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:54,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 110 [2023-11-26 11:58:54,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:54,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:54,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 110 [2023-11-26 11:58:54,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:55,554 INFO L124 PetriNetUnfolderBase]: 2242/3655 cut-off events. [2023-11-26 11:58:55,555 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2023-11-26 11:58:55,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7707 conditions, 3655 events. 2242/3655 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 25152 event pairs, 1236 based on Foata normal form. 12/3369 useless extension candidates. Maximal degree in co-relation 7700. Up to 1718 conditions per place. [2023-11-26 11:58:55,580 INFO L140 encePairwiseOnDemand]: 107/110 looper letters, 40 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-26 11:58:55,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 231 flow [2023-11-26 11:58:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:58:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2023-11-26 11:58:55,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2023-11-26 11:58:55,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2023-11-26 11:58:55,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2023-11-26 11:58:55,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:55,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2023-11-26 11:58:55,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:55,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:55,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:55,585 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 131 flow. Second operand 3 states and 118 transitions. [2023-11-26 11:58:55,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 231 flow [2023-11-26 11:58:55,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:58:55,587 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 129 flow [2023-11-26 11:58:55,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-11-26 11:58:55,588 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -54 predicate places. [2023-11-26 11:58:55,588 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 129 flow [2023-11-26 11:58:55,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:55,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:55,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:55,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:58:55,590 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:55,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:55,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1815185572, now seen corresponding path program 1 times [2023-11-26 11:58:55,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:55,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700904788] [2023-11-26 11:58:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:55,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:55,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:55,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700904788] [2023-11-26 11:58:55,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700904788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:55,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:55,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:58:55,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416247549] [2023-11-26 11:58:55,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:55,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:58:55,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:55,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:58:55,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:58:55,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 110 [2023-11-26 11:58:55,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:55,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:55,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 110 [2023-11-26 11:58:55,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:56,777 INFO L124 PetriNetUnfolderBase]: 2140/4120 cut-off events. [2023-11-26 11:58:56,777 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2023-11-26 11:58:56,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8030 conditions, 4120 events. 2140/4120 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31464 event pairs, 704 based on Foata normal form. 0/3863 useless extension candidates. Maximal degree in co-relation 8023. Up to 2109 conditions per place. [2023-11-26 11:58:56,801 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 57 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-26 11:58:56,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 322 flow [2023-11-26 11:58:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:58:56,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:58:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-26 11:58:56,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212121212121212 [2023-11-26 11:58:56,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-26 11:58:56,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-26 11:58:56,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:56,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-26 11:58:56,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:56,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:56,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:56,806 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 129 flow. Second operand 3 states and 139 transitions. [2023-11-26 11:58:56,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 322 flow [2023-11-26 11:58:56,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:58:56,810 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 135 flow [2023-11-26 11:58:56,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2023-11-26 11:58:56,811 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -53 predicate places. [2023-11-26 11:58:56,811 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 135 flow [2023-11-26 11:58:56,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:56,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:56,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:56,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:58:56,812 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:56,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:56,813 INFO L85 PathProgramCache]: Analyzing trace with hash 636666739, now seen corresponding path program 1 times [2023-11-26 11:58:56,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:56,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71094500] [2023-11-26 11:58:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:56,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:56,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:56,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71094500] [2023-11-26 11:58:56,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71094500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:56,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:56,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:58:56,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690973337] [2023-11-26 11:58:56,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:57,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:58:57,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:58:57,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:58:57,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 110 [2023-11-26 11:58:57,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:57,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:57,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 110 [2023-11-26 11:58:57,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:58,183 INFO L124 PetriNetUnfolderBase]: 2646/5318 cut-off events. [2023-11-26 11:58:58,183 INFO L125 PetriNetUnfolderBase]: For 850/850 co-relation queries the response was YES. [2023-11-26 11:58:58,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10984 conditions, 5318 events. 2646/5318 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45543 event pairs, 694 based on Foata normal form. 482/5642 useless extension candidates. Maximal degree in co-relation 10975. Up to 1812 conditions per place. [2023-11-26 11:58:58,210 INFO L140 encePairwiseOnDemand]: 93/110 looper letters, 52 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2023-11-26 11:58:58,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 323 flow [2023-11-26 11:58:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:58:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:58:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2023-11-26 11:58:58,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2023-11-26 11:58:58,213 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 182 transitions. [2023-11-26 11:58:58,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 182 transitions. [2023-11-26 11:58:58,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:58,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 182 transitions. [2023-11-26 11:58:58,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:58,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:58,216 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:58,216 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 135 flow. Second operand 4 states and 182 transitions. [2023-11-26 11:58:58,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 323 flow [2023-11-26 11:58:58,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 317 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:58:58,219 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 223 flow [2023-11-26 11:58:58,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-11-26 11:58:58,220 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -50 predicate places. [2023-11-26 11:58:58,221 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 223 flow [2023-11-26 11:58:58,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:58,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:58:58,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:58,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:58:58,222 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:58:58,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash 636666740, now seen corresponding path program 1 times [2023-11-26 11:58:58,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:58,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076355461] [2023-11-26 11:58:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:58,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:58,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:58,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076355461] [2023-11-26 11:58:58,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076355461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:58,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:58,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:58:58,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285053808] [2023-11-26 11:58:58,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:58,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:58:58,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:58,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:58:58,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:58:58,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 110 [2023-11-26 11:58:58,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:58,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:58:58,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 110 [2023-11-26 11:58:58,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:58:59,933 INFO L124 PetriNetUnfolderBase]: 3865/7534 cut-off events. [2023-11-26 11:58:59,933 INFO L125 PetriNetUnfolderBase]: For 3834/3843 co-relation queries the response was YES. [2023-11-26 11:58:59,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19718 conditions, 7534 events. 3865/7534 cut-off events. For 3834/3843 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 67851 event pairs, 2252 based on Foata normal form. 40/7332 useless extension candidates. Maximal degree in co-relation 19706. Up to 3410 conditions per place. [2023-11-26 11:58:59,987 INFO L140 encePairwiseOnDemand]: 105/110 looper letters, 66 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2023-11-26 11:58:59,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 88 transitions, 510 flow [2023-11-26 11:58:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:58:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:58:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2023-11-26 11:58:59,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2023-11-26 11:58:59,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 164 transitions. [2023-11-26 11:58:59,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 164 transitions. [2023-11-26 11:58:59,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:58:59,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 164 transitions. [2023-11-26 11:58:59,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:59,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:59,992 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:58:59,993 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 223 flow. Second operand 4 states and 164 transitions. [2023-11-26 11:58:59,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 88 transitions, 510 flow [2023-11-26 11:59:00,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 510 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:59:00,006 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 247 flow [2023-11-26 11:59:00,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-11-26 11:59:00,007 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -46 predicate places. [2023-11-26 11:59:00,007 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 247 flow [2023-11-26 11:59:00,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:00,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:59:00,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:00,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:59:00,008 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-26 11:59:00,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash -493130644, now seen corresponding path program 2 times [2023-11-26 11:59:00,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:00,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163968524] [2023-11-26 11:59:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:00,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:00,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:00,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163968524] [2023-11-26 11:59:00,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163968524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:00,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:00,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:59:00,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255603369] [2023-11-26 11:59:00,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:00,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:59:00,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:00,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:59:00,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:00,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 110 [2023-11-26 11:59:00,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:00,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:59:00,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 110 [2023-11-26 11:59:00,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand