./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/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_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/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_14705927-796f-4cf7-a0f7-4388335cc9ad/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 f044966ade6b1d79627a5dcb577ad24e14a4ae2ab2467e458af5fa83aa6cd521 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:46:12,960 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:46:13,082 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:46:13,094 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:46:13,095 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:46:13,134 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:46:13,136 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:46:13,136 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:46:13,137 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:46:13,142 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:46:13,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:46:13,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:46:13,144 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:46:13,145 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:46:13,145 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:46:13,146 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:46:13,147 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:46:13,147 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:46:13,147 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:46:13,148 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:46:13,148 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:46:13,149 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:46:13,150 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:46:13,150 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:46:13,150 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:46:13,151 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:46:13,151 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:46:13,152 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:46:13,152 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:46:13,153 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:46:13,154 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:46:13,154 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:46:13,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:13,155 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:46:13,155 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:46:13,155 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:46:13,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:46:13,156 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:46:13,156 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:46:13,156 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:46:13,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:46:13,157 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_14705927-796f-4cf7-a0f7-4388335cc9ad/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f044966ade6b1d79627a5dcb577ad24e14a4ae2ab2467e458af5fa83aa6cd521 [2023-11-26 11:46:13,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:46:13,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:46:13,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:46:13,512 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:46:13,512 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:46:13,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c [2023-11-26 11:46:16,555 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:46:16,752 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:46:16,753 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/sv-benchmarks/c/weaver/parallel-ticket-5.wvr.c [2023-11-26 11:46:16,762 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme/data/b2c57d45c/1efbbb42b9d04a3283edcf587376f55b/FLAG0e893c47a [2023-11-26 11:46:16,782 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme/data/b2c57d45c/1efbbb42b9d04a3283edcf587376f55b [2023-11-26 11:46:16,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:46:16,786 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:46:16,789 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:16,789 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:46:16,794 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:46:16,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:16,795 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e97a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16, skipping insertion in model container [2023-11-26 11:46:16,795 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:16,825 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:46:17,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:17,023 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:46:17,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:17,064 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:46:17,064 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:46:17,072 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:46:17,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17 WrapperNode [2023-11-26 11:46:17,073 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:17,074 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:17,074 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:46:17,074 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:46:17,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,092 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,125 INFO L138 Inliner]: procedures = 24, calls = 86, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 253 [2023-11-26 11:46:17,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:17,131 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:46:17,136 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:46:17,136 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:46:17,146 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,152 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,170 INFO L175 MemorySlicer]: Split 12 memory accesses to 6 slices as follows [2, 2, 2, 2, 2, 2]. 17 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 1, 1, 1]. [2023-11-26 11:46:17,171 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,171 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,182 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,185 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,189 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,194 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:46:17,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:46:17,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:46:17,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:46:17,196 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (1/1) ... [2023-11-26 11:46:17,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:17,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:46:17,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14705927-796f-4cf7-a0f7-4388335cc9ad/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:46:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:46:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:46:17,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:46:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:46:17,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:46:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 11:46:17,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 11:46:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-26 11:46:17,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-26 11:46:17,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:46:17,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:46:17,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:46:17,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:46:17,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:46:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:46:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-26 11:46:17,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-26 11:46:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:46:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:46:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:46:17,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:46:17,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:46:17,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:46:17,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 11:46:17,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:46:17,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:46:17,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:46:17,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:46:17,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:46:17,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:46:17,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:46:17,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:46:17,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:46:17,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 11:46:17,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:46:17,282 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 11:46:17,436 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:46:17,438 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:46:17,816 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:46:18,154 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:46:18,155 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 11:46:18,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:18 BoogieIcfgContainer [2023-11-26 11:46:18,156 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:46:18,160 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:46:18,160 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:46:18,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:46:18,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:46:16" (1/3) ... [2023-11-26 11:46:18,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2662b853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:18, skipping insertion in model container [2023-11-26 11:46:18,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:17" (2/3) ... [2023-11-26 11:46:18,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2662b853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:18, skipping insertion in model container [2023-11-26 11:46:18,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:18" (3/3) ... [2023-11-26 11:46:18,171 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-5.wvr.c [2023-11-26 11:46:18,190 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:46:18,191 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-26 11:46:18,191 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:46:18,292 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-26 11:46:18,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 91 transitions, 217 flow [2023-11-26 11:46:18,413 INFO L124 PetriNetUnfolderBase]: 0/86 cut-off events. [2023-11-26 11:46:18,414 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-26 11:46:18,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 86 events. 0/86 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 166 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-26 11:46:18,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 91 transitions, 217 flow [2023-11-26 11:46:18,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 85 transitions, 200 flow [2023-11-26 11:46:18,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:46:18,440 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;@7cc4fd6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:46:18,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-11-26 11:46:18,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:46:18,444 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 11:46:18,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:46:18,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:18,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:46:18,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-26 11:46:18,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash 16969, now seen corresponding path program 1 times [2023-11-26 11:46:18,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:18,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163810776] [2023-11-26 11:46:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:18,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:19,141 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 11:46:19,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163810776] [2023-11-26 11:46:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163810776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:19,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:19,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:19,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182710594] [2023-11-26 11:46:19,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:19,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:19,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:19,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:19,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:19,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-26 11:46:19,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 85 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 11:46:19,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:19,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-26 11:46:19,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:28,054 INFO L124 PetriNetUnfolderBase]: 41408/60617 cut-off events. [2023-11-26 11:46:28,055 INFO L125 PetriNetUnfolderBase]: For 2723/2723 co-relation queries the response was YES. [2023-11-26 11:46:28,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116094 conditions, 60617 events. 41408/60617 cut-off events. For 2723/2723 co-relation queries the response was YES. Maximal size of possible extension queue 2070. Compared 442967 event pairs, 41408 based on Foata normal form. 1/58216 useless extension candidates. Maximal degree in co-relation 105924. Up to 53127 conditions per place. [2023-11-26 11:46:28,583 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-11-26 11:46:28,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 81 transitions, 270 flow [2023-11-26 11:46:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-11-26 11:46:28,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813186813186813 [2023-11-26 11:46:28,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-11-26 11:46:28,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-11-26 11:46:28,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:28,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-11-26 11:46:28,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 11:46:28,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:28,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:28,619 INFO L175 Difference]: Start difference. First operand has 101 places, 85 transitions, 200 flow. Second operand 3 states and 186 transitions. [2023-11-26 11:46:28,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 81 transitions, 270 flow [2023-11-26 11:46:28,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 81 transitions, 250 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-11-26 11:46:28,735 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 174 flow [2023-11-26 11:46:28,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2023-11-26 11:46:28,744 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -12 predicate places. [2023-11-26 11:46:28,744 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 174 flow [2023-11-26 11:46:28,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 11:46:28,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:28,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:46:28,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:46:28,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-26 11:46:28,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:28,747 INFO L85 PathProgramCache]: Analyzing trace with hash 16970, now seen corresponding path program 1 times [2023-11-26 11:46:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:28,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698243632] [2023-11-26 11:46:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:28,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:29,231 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 11:46:29,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:29,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698243632] [2023-11-26 11:46:29,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698243632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:29,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:29,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:29,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143844350] [2023-11-26 11:46:29,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:29,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:29,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:29,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 91 [2023-11-26 11:46:29,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 11:46:29,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:29,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 91 [2023-11-26 11:46:29,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:32,986 INFO L124 PetriNetUnfolderBase]: 28908/42402 cut-off events. [2023-11-26 11:46:32,987 INFO L125 PetriNetUnfolderBase]: For 780/783 co-relation queries the response was YES. [2023-11-26 11:46:33,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80688 conditions, 42402 events. 28908/42402 cut-off events. For 780/783 co-relation queries the response was YES. Maximal size of possible extension queue 1526. Compared 302027 event pairs, 28908 based on Foata normal form. 3126/44143 useless extension candidates. Maximal degree in co-relation 80682. Up to 37501 conditions per place. [2023-11-26 11:46:33,233 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 36 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-11-26 11:46:33,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 79 transitions, 244 flow [2023-11-26 11:46:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-26 11:46:33,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2023-11-26 11:46:33,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-26 11:46:33,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-26 11:46:33,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:33,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-26 11:46:33,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 11:46:33,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:33,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:33,253 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 174 flow. Second operand 3 states and 189 transitions. [2023-11-26 11:46:33,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 79 transitions, 244 flow [2023-11-26 11:46:33,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 79 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:46:33,258 INFO L231 Difference]: Finished difference. Result has 88 places, 79 transitions, 171 flow [2023-11-26 11:46:33,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=88, PETRI_TRANSITIONS=79} [2023-11-26 11:46:33,259 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -13 predicate places. [2023-11-26 11:46:33,259 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 171 flow [2023-11-26 11:46:33,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 11:46:33,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:33,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:46:33,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:46:33,262 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-26 11:46:33,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:33,265 INFO L85 PathProgramCache]: Analyzing trace with hash 506063832, now seen corresponding path program 1 times [2023-11-26 11:46:33,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:33,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142985126] [2023-11-26 11:46:33,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:33,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:33,532 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 11:46:33,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:33,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142985126] [2023-11-26 11:46:33,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142985126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:33,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:33,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:33,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209452576] [2023-11-26 11:46:33,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:33,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:33,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:33,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:33,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:33,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 91 [2023-11-26 11:46:33,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 11:46:33,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:33,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 91 [2023-11-26 11:46:33,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:36,831 INFO L124 PetriNetUnfolderBase]: 28908/42200 cut-off events. [2023-11-26 11:46:36,831 INFO L125 PetriNetUnfolderBase]: For 780/783 co-relation queries the response was YES. [2023-11-26 11:46:36,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80487 conditions, 42200 events. 28908/42200 cut-off events. For 780/783 co-relation queries the response was YES. Maximal size of possible extension queue 1513. Compared 297961 event pairs, 28908 based on Foata normal form. 480/41497 useless extension candidates. Maximal degree in co-relation 80480. Up to 37501 conditions per place. [2023-11-26 11:46:37,174 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 36 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-11-26 11:46:37,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 241 flow [2023-11-26 11:46:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-26 11:46:37,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2023-11-26 11:46:37,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-26 11:46:37,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-26 11:46:37,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:37,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-26 11:46:37,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 11:46:37,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:37,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:37,185 INFO L175 Difference]: Start difference. First operand has 88 places, 79 transitions, 171 flow. Second operand 3 states and 189 transitions. [2023-11-26 11:46:37,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 241 flow [2023-11-26 11:46:37,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:46:37,190 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 168 flow [2023-11-26 11:46:37,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2023-11-26 11:46:37,193 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -14 predicate places. [2023-11-26 11:46:37,193 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 168 flow [2023-11-26 11:46:37,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 11:46:37,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:37,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:46:37,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:46:37,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-26 11:46:37,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash 506063831, now seen corresponding path program 1 times [2023-11-26 11:46:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:37,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704692912] [2023-11-26 11:46:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:37,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:37,373 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 11:46:37,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:37,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704692912] [2023-11-26 11:46:37,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704692912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:37,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:37,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:37,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989715432] [2023-11-26 11:46:37,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:37,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:37,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:37,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:37,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-26 11:46:37,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 168 flow. Second operand has 3 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 11:46:37,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:37,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-26 11:46:37,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:40,890 INFO L124 PetriNetUnfolderBase]: 30912/44946 cut-off events. [2023-11-26 11:46:40,891 INFO L125 PetriNetUnfolderBase]: For 741/741 co-relation queries the response was YES. [2023-11-26 11:46:40,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85868 conditions, 44946 events. 30912/44946 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 313781 event pairs, 30912 based on Foata normal form. 0/43648 useless extension candidates. Maximal degree in co-relation 85860. Up to 40135 conditions per place. [2023-11-26 11:46:41,144 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-11-26 11:46:41,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 75 transitions, 242 flow [2023-11-26 11:46:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-26 11:46:41,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-26 11:46:41,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-26 11:46:41,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-26 11:46:41,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:41,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-26 11:46:41,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 11:46:41,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:41,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:41,151 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 168 flow. Second operand 3 states and 185 transitions. [2023-11-26 11:46:41,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 75 transitions, 242 flow [2023-11-26 11:46:41,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:46:41,155 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 165 flow [2023-11-26 11:46:41,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2023-11-26 11:46:41,158 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -15 predicate places. [2023-11-26 11:46:41,159 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 165 flow [2023-11-26 11:46:41,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 11:46:41,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:41,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:41,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:46:41,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-26 11:46:41,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:41,166 INFO L85 PathProgramCache]: Analyzing trace with hash 812927118, now seen corresponding path program 1 times [2023-11-26 11:46:41,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:41,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142635489] [2023-11-26 11:46:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:41,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:41,287 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 11:46:41,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:41,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142635489] [2023-11-26 11:46:41,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142635489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:41,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:41,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:41,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027072924] [2023-11-26 11:46:41,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:41,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:41,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:41,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:41,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:41,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-26 11:46:41,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 11:46:41,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:41,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-26 11:46:41,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:44,862 INFO L124 PetriNetUnfolderBase]: 29248/42495 cut-off events. [2023-11-26 11:46:44,862 INFO L125 PetriNetUnfolderBase]: For 773/773 co-relation queries the response was YES. [2023-11-26 11:46:44,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81274 conditions, 42495 events. 29248/42495 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 296191 event pairs, 29248 based on Foata normal form. 0/41538 useless extension candidates. Maximal degree in co-relation 81265. Up to 37991 conditions per place. [2023-11-26 11:46:45,089 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-11-26 11:46:45,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 73 transitions, 239 flow [2023-11-26 11:46:45,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-26 11:46:45,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-26 11:46:45,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-26 11:46:45,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-26 11:46:45,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:45,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-26 11:46:45,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 11:46:45,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:45,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:45,094 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 165 flow. Second operand 3 states and 185 transitions. [2023-11-26 11:46:45,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 73 transitions, 239 flow [2023-11-26 11:46:45,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 73 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:46:45,100 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 162 flow [2023-11-26 11:46:45,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2023-11-26 11:46:45,103 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -16 predicate places. [2023-11-26 11:46:45,103 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 162 flow [2023-11-26 11:46:45,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 11:46:45,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:45,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:45,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:46:45,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-26 11:46:45,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:45,106 INFO L85 PathProgramCache]: Analyzing trace with hash 812927119, now seen corresponding path program 1 times [2023-11-26 11:46:45,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:45,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396285149] [2023-11-26 11:46:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:45,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:45,262 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 11:46:45,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:45,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396285149] [2023-11-26 11:46:45,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396285149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:45,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:45,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:45,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360944586] [2023-11-26 11:46:45,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:45,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:45,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:45,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:45,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:45,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 91 [2023-11-26 11:46:45,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 11:46:45,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:45,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 91 [2023-11-26 11:46:45,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:48,820 INFO L124 PetriNetUnfolderBase]: 28908/41902 cut-off events. [2023-11-26 11:46:48,820 INFO L125 PetriNetUnfolderBase]: For 780/783 co-relation queries the response was YES. [2023-11-26 11:46:48,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80192 conditions, 41902 events. 28908/41902 cut-off events. For 780/783 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 292571 event pairs, 28908 based on Foata normal form. 120/41137 useless extension candidates. Maximal degree in co-relation 80182. Up to 37501 conditions per place. [2023-11-26 11:46:49,025 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 36 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-11-26 11:46:49,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 71 transitions, 232 flow [2023-11-26 11:46:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-26 11:46:49,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2023-11-26 11:46:49,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-26 11:46:49,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-26 11:46:49,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:49,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-26 11:46:49,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 11:46:49,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:49,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:49,031 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 162 flow. Second operand 3 states and 189 transitions. [2023-11-26 11:46:49,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 71 transitions, 232 flow [2023-11-26 11:46:49,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 71 transitions, 231 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:46:49,033 INFO L231 Difference]: Finished difference. Result has 84 places, 71 transitions, 159 flow [2023-11-26 11:46:49,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=84, PETRI_TRANSITIONS=71} [2023-11-26 11:46:49,035 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -17 predicate places. [2023-11-26 11:46:49,035 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 71 transitions, 159 flow [2023-11-26 11:46:49,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 11:46:49,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:49,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:49,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:46:49,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-26 11:46:49,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1408266537, now seen corresponding path program 1 times [2023-11-26 11:46:49,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:49,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542340113] [2023-11-26 11:46:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:49,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:49,118 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 11:46:49,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:49,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542340113] [2023-11-26 11:46:49,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542340113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:49,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:49,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:49,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140326939] [2023-11-26 11:46:49,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:49,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:49,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:49,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:49,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:49,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-26 11:46:49,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 71 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 11:46:49,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:49,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-26 11:46:49,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:52,190 INFO L124 PetriNetUnfolderBase]: 29248/42371 cut-off events. [2023-11-26 11:46:52,190 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2023-11-26 11:46:52,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81152 conditions, 42371 events. 29248/42371 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 295587 event pairs, 29248 based on Foata normal form. 0/41570 useless extension candidates. Maximal degree in co-relation 81141. Up to 37991 conditions per place. [2023-11-26 11:46:52,397 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-11-26 11:46:52,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 69 transitions, 233 flow [2023-11-26 11:46:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-26 11:46:52,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-26 11:46:52,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-26 11:46:52,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-26 11:46:52,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:52,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-26 11:46:52,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 11:46:52,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:52,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:52,412 INFO L175 Difference]: Start difference. First operand has 84 places, 71 transitions, 159 flow. Second operand 3 states and 185 transitions. [2023-11-26 11:46:52,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 69 transitions, 233 flow [2023-11-26 11:46:52,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 69 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:46:52,419 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 156 flow [2023-11-26 11:46:52,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2023-11-26 11:46:52,420 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -18 predicate places. [2023-11-26 11:46:52,420 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 156 flow [2023-11-26 11:46:52,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 11:46:52,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:52,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:52,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:46:52,421 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-26 11:46:52,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:52,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1408266536, now seen corresponding path program 1 times [2023-11-26 11:46:52,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:52,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792269541] [2023-11-26 11:46:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:52,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:52,577 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 11:46:52,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:52,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792269541] [2023-11-26 11:46:52,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792269541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:52,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:52,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:52,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85987144] [2023-11-26 11:46:52,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:52,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:52,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:52,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:52,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:52,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-26 11:46:52,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 11:46:52,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:52,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-26 11:46:52,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:56,233 INFO L124 PetriNetUnfolderBase]: 29248/42331 cut-off events. [2023-11-26 11:46:56,233 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2023-11-26 11:46:56,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81113 conditions, 42331 events. 29248/42331 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 294864 event pairs, 29248 based on Foata normal form. 0/41530 useless extension candidates. Maximal degree in co-relation 81101. Up to 37991 conditions per place. [2023-11-26 11:46:56,406 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-11-26 11:46:56,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 67 transitions, 230 flow [2023-11-26 11:46:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-26 11:46:56,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-26 11:46:56,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-26 11:46:56,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-26 11:46:56,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:56,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-26 11:46:56,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 11:46:56,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:56,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:46:56,410 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 156 flow. Second operand 3 states and 185 transitions. [2023-11-26 11:46:56,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 67 transitions, 230 flow [2023-11-26 11:46:56,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 67 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:46:56,413 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 153 flow [2023-11-26 11:46:56,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2023-11-26 11:46:56,414 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -19 predicate places. [2023-11-26 11:46:56,414 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 153 flow [2023-11-26 11:46:56,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 11:46:56,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:56,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:56,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:46:56,415 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-26 11:46:56,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:56,415 INFO L85 PathProgramCache]: Analyzing trace with hash -427306712, now seen corresponding path program 1 times [2023-11-26 11:46:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:56,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826306882] [2023-11-26 11:46:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:56,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:56,490 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 11:46:56,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:56,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826306882] [2023-11-26 11:46:56,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826306882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:56,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:56,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:56,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992321021] [2023-11-26 11:46:56,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:56,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:56,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:56,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:56,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-26 11:46:56,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 11:46:56,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:56,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-26 11:46:56,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:59,778 INFO L124 PetriNetUnfolderBase]: 30912/44153 cut-off events. [2023-11-26 11:46:59,778 INFO L125 PetriNetUnfolderBase]: For 780/783 co-relation queries the response was YES. [2023-11-26 11:46:59,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85080 conditions, 44153 events. 30912/44153 cut-off events. For 780/783 co-relation queries the response was YES. Maximal size of possible extension queue 1561. Compared 302754 event pairs, 30912 based on Foata normal form. 0/43726 useless extension candidates. Maximal degree in co-relation 85067. Up to 40135 conditions per place. [2023-11-26 11:47:00,015 INFO L140 encePairwiseOnDemand]: 88/91 looper letters, 38 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-11-26 11:47:00,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 65 transitions, 227 flow [2023-11-26 11:47:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-26 11:47:00,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2023-11-26 11:47:00,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-26 11:47:00,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-26 11:47:00,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:00,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-26 11:47:00,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 11:47:00,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:47:00,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 11:47:00,019 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 153 flow. Second operand 3 states and 185 transitions. [2023-11-26 11:47:00,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 65 transitions, 227 flow [2023-11-26 11:47:00,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 65 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:00,021 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 150 flow [2023-11-26 11:47:00,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2023-11-26 11:47:00,021 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -20 predicate places. [2023-11-26 11:47:00,022 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 150 flow [2023-11-26 11:47:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 11:47:00,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:00,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:00,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:47:00,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-26 11:47:00,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash -427306711, now seen corresponding path program 1 times [2023-11-26 11:47:00,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:00,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257064459] [2023-11-26 11:47:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:00,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:00,106 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 11:47:00,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:00,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257064459] [2023-11-26 11:47:00,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257064459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:00,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:00,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:47:00,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097832799] [2023-11-26 11:47:00,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:00,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:00,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:00,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:00,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:00,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 91 [2023-11-26 11:47:00,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 11:47:00,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:00,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 91 [2023-11-26 11:47:00,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand