./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --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_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/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_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/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_dec850d2-d57b-464a-b79b-1dc390914184/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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:46:51,624 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:46:51,699 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:46:51,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:46:51,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:46:51,727 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:46:51,728 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:46:51,728 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:46:51,729 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:46:51,730 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:46:51,730 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:46:51,731 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:46:51,731 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:46:51,732 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:46:51,733 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:46:51,733 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:46:51,734 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:46:51,734 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:46:51,735 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:46:51,735 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:46:51,736 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:46:51,737 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:46:51,737 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:46:51,738 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:46:51,738 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:46:51,739 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:46:51,739 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:46:51,739 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:46:51,740 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:46:51,740 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:46:51,741 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:46:51,741 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:46:51,742 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:51,742 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:46:51,743 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:46:51,743 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:46:51,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:46:51,744 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:46:51,745 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:46:51,745 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:46:51,746 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:46:51,746 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_dec850d2-d57b-464a-b79b-1dc390914184/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2023-11-26 11:46:51,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:46:52,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:46:52,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:46:52,018 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:46:52,019 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:46:52,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-26 11:46:55,167 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:46:55,483 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:46:55,484 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-26 11:46:55,504 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/data/46fbf709a/57d1f56a868b4a7294cfdbdc0f018bba/FLAG0efca349e [2023-11-26 11:46:55,519 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/data/46fbf709a/57d1f56a868b4a7294cfdbdc0f018bba [2023-11-26 11:46:55,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:46:55,524 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:46:55,525 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:55,526 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:46:55,531 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:46:55,532 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:55" (1/1) ... [2023-11-26 11:46:55,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf34374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:55, skipping insertion in model container [2023-11-26 11:46:55,534 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:55" (1/1) ... [2023-11-26 11:46:55,598 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:46:56,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:56,097 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:46:56,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:56,281 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:46:56,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56 WrapperNode [2023-11-26 11:46:56,287 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:56,294 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:56,294 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:46:56,295 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:46:56,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,321 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,371 INFO L138 Inliner]: procedures = 278, calls = 41, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 160 [2023-11-26 11:46:56,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:56,372 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:46:56,372 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:46:56,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:46:56,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,394 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,414 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 5, 2, 3]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 4 writes are split as follows [0, 1, 0, 1, 2]. [2023-11-26 11:46:56,418 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,419 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,434 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,437 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,460 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,462 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,467 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:46:56,468 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:46:56,468 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:46:56,468 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:46:56,469 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (1/1) ... [2023-11-26 11:46:56,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:56,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:56,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:46:56,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:46:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 11:46:56,540 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 11:46:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 11:46:56,540 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 11:46:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:46:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:46:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:46:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:46:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:46:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:46:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:46:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:46:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:46:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:46:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:46:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:46:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:46:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:46:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:46:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:46:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:46:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:46:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:46:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:46:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:46:56,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:46:56,546 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 11:46:56,743 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:46:56,746 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:46:57,078 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:46:57,283 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:46:57,284 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:46:57,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:57 BoogieIcfgContainer [2023-11-26 11:46:57,285 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:46:57,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:46:57,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:46:57,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:46:57,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:46:55" (1/3) ... [2023-11-26 11:46:57,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797f18ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:57, skipping insertion in model container [2023-11-26 11:46:57,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:56" (2/3) ... [2023-11-26 11:46:57,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797f18ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:57, skipping insertion in model container [2023-11-26 11:46:57,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:57" (3/3) ... [2023-11-26 11:46:57,294 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-11-26 11:46:57,315 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:46:57,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-26 11:46:57,315 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:46:57,409 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:46:57,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 67 transitions, 148 flow [2023-11-26 11:46:57,480 INFO L124 PetriNetUnfolderBase]: 9/65 cut-off events. [2023-11-26 11:46:57,480 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:46:57,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 9/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 168 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 53. Up to 3 conditions per place. [2023-11-26 11:46:57,485 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 67 transitions, 148 flow [2023-11-26 11:46:57,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 64 transitions, 140 flow [2023-11-26 11:46:57,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:46:57,506 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;@5c55e9ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:46:57,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-26 11:46:57,510 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:46:57,510 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 11:46:57,510 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:46:57,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:57,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:46:57,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:46:57,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:57,518 INFO L85 PathProgramCache]: Analyzing trace with hash 14155, now seen corresponding path program 1 times [2023-11-26 11:46:57,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:57,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326238835] [2023-11-26 11:46:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:57,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:57,941 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 11:46:57,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:57,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326238835] [2023-11-26 11:46:57,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326238835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:57,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:57,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:57,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243449021] [2023-11-26 11:46:57,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:57,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:57,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:57,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:57,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:58,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2023-11-26 11:46:58,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:58,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:58,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2023-11-26 11:46:58,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:58,402 INFO L124 PetriNetUnfolderBase]: 731/1402 cut-off events. [2023-11-26 11:46:58,403 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-26 11:46:58,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 1402 events. 731/1402 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7868 event pairs, 559 based on Foata normal form. 138/1308 useless extension candidates. Maximal degree in co-relation 2462. Up to 1125 conditions per place. [2023-11-26 11:46:58,426 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 32 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-11-26 11:46:58,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 192 flow [2023-11-26 11:46:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-26 11:46:58,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572139303482587 [2023-11-26 11:46:58,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-26 11:46:58,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-26 11:46:58,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:58,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-26 11:46:58,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 11:46:58,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:46:58,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:46:58,464 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 140 flow. Second operand 3 states and 112 transitions. [2023-11-26 11:46:58,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 56 transitions, 192 flow [2023-11-26 11:46:58,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:46:58,477 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 120 flow [2023-11-26 11:46:58,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-11-26 11:46:58,485 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2023-11-26 11:46:58,486 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 120 flow [2023-11-26 11:46:58,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:58,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:58,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 11:46:58,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:46:58,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:46:58,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:58,489 INFO L85 PathProgramCache]: Analyzing trace with hash 14156, now seen corresponding path program 1 times [2023-11-26 11:46:58,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:58,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028043605] [2023-11-26 11:46:58,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:58,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:58,684 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 11:46:58,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:58,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028043605] [2023-11-26 11:46:58,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028043605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:58,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:58,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:58,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058789119] [2023-11-26 11:46:58,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:58,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:58,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-26 11:46:58,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 11:46:58,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:58,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-26 11:46:58,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:58,916 INFO L124 PetriNetUnfolderBase]: 456/945 cut-off events. [2023-11-26 11:46:58,916 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-26 11:46:58,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 945 events. 456/945 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5203 event pairs, 339 based on Foata normal form. 122/896 useless extension candidates. Maximal degree in co-relation 1681. Up to 728 conditions per place. [2023-11-26 11:46:58,926 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 30 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-11-26 11:46:58,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 180 flow [2023-11-26 11:46:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-26 11:46:58,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572139303482587 [2023-11-26 11:46:58,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-26 11:46:58,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-26 11:46:58,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:58,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-26 11:46:58,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 11:46:58,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:46:58,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:46:58,941 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 120 flow. Second operand 3 states and 112 transitions. [2023-11-26 11:46:58,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 180 flow [2023-11-26 11:46:58,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:46:58,945 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 116 flow [2023-11-26 11:46:58,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2023-11-26 11:46:58,946 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2023-11-26 11:46:58,951 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 116 flow [2023-11-26 11:46:58,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 11:46:58,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:58,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:46:58,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:46:58,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:46:58,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 422146670, now seen corresponding path program 1 times [2023-11-26 11:46:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592913794] [2023-11-26 11:46:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:58,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:59,074 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 11:46:59,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:59,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592913794] [2023-11-26 11:46:59,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592913794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:59,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:59,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:59,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366670373] [2023-11-26 11:46:59,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:59,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:59,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:59,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2023-11-26 11:46:59,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:59,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:59,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2023-11-26 11:46:59,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:59,283 INFO L124 PetriNetUnfolderBase]: 481/984 cut-off events. [2023-11-26 11:46:59,284 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-26 11:46:59,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 984 events. 481/984 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5410 event pairs, 359 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 1767. Up to 775 conditions per place. [2023-11-26 11:46:59,293 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 32 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-11-26 11:46:59,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 180 flow [2023-11-26 11:46:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-26 11:46:59,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373134328358209 [2023-11-26 11:46:59,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-26 11:46:59,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-26 11:46:59,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:59,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-26 11:46:59,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 11:46:59,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:46:59,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:46:59,303 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 116 flow. Second operand 3 states and 108 transitions. [2023-11-26 11:46:59,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 180 flow [2023-11-26 11:46:59,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:46:59,306 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 112 flow [2023-11-26 11:46:59,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2023-11-26 11:46:59,308 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -10 predicate places. [2023-11-26 11:46:59,308 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 112 flow [2023-11-26 11:46:59,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:59,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:59,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:46:59,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:46:59,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:46:59,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:59,311 INFO L85 PathProgramCache]: Analyzing trace with hash 422146671, now seen corresponding path program 1 times [2023-11-26 11:46:59,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:59,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463998278] [2023-11-26 11:46:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:59,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:59,437 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 11:46:59,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463998278] [2023-11-26 11:46:59,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463998278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:59,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:59,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:46:59,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854984067] [2023-11-26 11:46:59,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:59,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:59,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:59,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:59,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-26 11:46:59,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 11:46:59,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:46:59,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-26 11:46:59,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:46:59,648 INFO L124 PetriNetUnfolderBase]: 456/929 cut-off events. [2023-11-26 11:46:59,648 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-26 11:46:59,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1675 conditions, 929 events. 456/929 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5047 event pairs, 339 based on Foata normal form. 21/795 useless extension candidates. Maximal degree in co-relation 1665. Up to 728 conditions per place. [2023-11-26 11:46:59,657 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 30 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-11-26 11:46:59,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 172 flow [2023-11-26 11:46:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:46:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-26 11:46:59,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572139303482587 [2023-11-26 11:46:59,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-26 11:46:59,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-26 11:46:59,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:46:59,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-26 11:46:59,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 11:46:59,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:46:59,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:46:59,665 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 112 flow. Second operand 3 states and 112 transitions. [2023-11-26 11:46:59,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 172 flow [2023-11-26 11:46:59,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:46:59,667 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 108 flow [2023-11-26 11:46:59,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-11-26 11:46:59,669 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -12 predicate places. [2023-11-26 11:46:59,669 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 108 flow [2023-11-26 11:46:59,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 11:46:59,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:59,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:59,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:46:59,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:46:59,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:59,671 INFO L85 PathProgramCache]: Analyzing trace with hash -271719771, now seen corresponding path program 1 times [2023-11-26 11:46:59,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:59,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102654567] [2023-11-26 11:46:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:59,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:59,999 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 11:47:00,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:00,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102654567] [2023-11-26 11:47:00,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102654567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:00,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:00,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:47:00,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095728132] [2023-11-26 11:47:00,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:00,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:47:00,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:47:00,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:47:00,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 67 [2023-11-26 11:47:00,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 11:47:00,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:00,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 67 [2023-11-26 11:47:00,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:00,363 INFO L124 PetriNetUnfolderBase]: 731/1332 cut-off events. [2023-11-26 11:47:00,364 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 11:47:00,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1332 events. 731/1332 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7230 event pairs, 399 based on Foata normal form. 0/1138 useless extension candidates. Maximal degree in co-relation 2465. Up to 797 conditions per place. [2023-11-26 11:47:00,374 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 46 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-11-26 11:47:00,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 239 flow [2023-11-26 11:47:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:47:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:47:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2023-11-26 11:47:00,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634328358208955 [2023-11-26 11:47:00,377 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 151 transitions. [2023-11-26 11:47:00,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 151 transitions. [2023-11-26 11:47:00,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:00,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 151 transitions. [2023-11-26 11:47:00,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 11:47:00,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 11:47:00,380 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 11:47:00,380 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 108 flow. Second operand 4 states and 151 transitions. [2023-11-26 11:47:00,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 239 flow [2023-11-26 11:47:00,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:00,383 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 110 flow [2023-11-26 11:47:00,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-11-26 11:47:00,384 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -12 predicate places. [2023-11-26 11:47:00,384 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 110 flow [2023-11-26 11:47:00,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 11:47:00,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:00,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:00,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:47:00,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:00,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash -271719770, now seen corresponding path program 1 times [2023-11-26 11:47:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:00,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165086743] [2023-11-26 11:47:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:00,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:00,714 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 11:47:00,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:00,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165086743] [2023-11-26 11:47:00,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165086743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:00,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:00,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:47:00,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116616016] [2023-11-26 11:47:00,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:00,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:47:00,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:00,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:47:00,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:47:00,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-26 11:47:00,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 11:47:00,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:00,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-26 11:47:00,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:01,236 INFO L124 PetriNetUnfolderBase]: 574/1114 cut-off events. [2023-11-26 11:47:01,237 INFO L125 PetriNetUnfolderBase]: For 48/49 co-relation queries the response was YES. [2023-11-26 11:47:01,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2129 conditions, 1114 events. 574/1114 cut-off events. For 48/49 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5635 event pairs, 179 based on Foata normal form. 9/973 useless extension candidates. Maximal degree in co-relation 697. Up to 756 conditions per place. [2023-11-26 11:47:01,247 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 60 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-11-26 11:47:01,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 81 transitions, 313 flow [2023-11-26 11:47:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:47:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:47:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2023-11-26 11:47:01,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771144278606966 [2023-11-26 11:47:01,250 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 232 transitions. [2023-11-26 11:47:01,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 232 transitions. [2023-11-26 11:47:01,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:01,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 232 transitions. [2023-11-26 11:47:01,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 38.666666666666664) internal successors, (232), 6 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 11:47:01,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 11:47:01,254 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 11:47:01,255 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 110 flow. Second operand 6 states and 232 transitions. [2023-11-26 11:47:01,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 81 transitions, 313 flow [2023-11-26 11:47:01,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 301 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:47:01,258 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 145 flow [2023-11-26 11:47:01,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2023-11-26 11:47:01,260 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -7 predicate places. [2023-11-26 11:47:01,260 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 145 flow [2023-11-26 11:47:01,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 11:47:01,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:01,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:01,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:47:01,261 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:01,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:01,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1139511957, now seen corresponding path program 1 times [2023-11-26 11:47:01,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:01,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420014508] [2023-11-26 11:47:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:01,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:01,330 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 11:47:01,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:01,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420014508] [2023-11-26 11:47:01,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420014508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:01,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:01,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:47:01,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857525798] [2023-11-26 11:47:01,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:01,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:47:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:47:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:47:01,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-26 11:47:01,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 11:47:01,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:01,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-26 11:47:01,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:01,642 INFO L124 PetriNetUnfolderBase]: 823/1586 cut-off events. [2023-11-26 11:47:01,643 INFO L125 PetriNetUnfolderBase]: For 297/301 co-relation queries the response was YES. [2023-11-26 11:47:01,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3288 conditions, 1586 events. 823/1586 cut-off events. For 297/301 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8594 event pairs, 363 based on Foata normal form. 1/1439 useless extension candidates. Maximal degree in co-relation 1129. Up to 859 conditions per place. [2023-11-26 11:47:01,657 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 71 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2023-11-26 11:47:01,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 397 flow [2023-11-26 11:47:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:47:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:47:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 185 transitions. [2023-11-26 11:47:01,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6902985074626866 [2023-11-26 11:47:01,660 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 185 transitions. [2023-11-26 11:47:01,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 185 transitions. [2023-11-26 11:47:01,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:01,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 185 transitions. [2023-11-26 11:47:01,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 46.25) internal successors, (185), 4 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 11:47:01,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 11:47:01,662 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 11:47:01,663 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 145 flow. Second operand 4 states and 185 transitions. [2023-11-26 11:47:01,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 397 flow [2023-11-26 11:47:01,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:01,667 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 176 flow [2023-11-26 11:47:01,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2023-11-26 11:47:01,668 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2023-11-26 11:47:01,668 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 176 flow [2023-11-26 11:47:01,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 11:47:01,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:01,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:01,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:47:01,669 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:01,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:01,670 INFO L85 PathProgramCache]: Analyzing trace with hash -698602535, now seen corresponding path program 1 times [2023-11-26 11:47:01,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:01,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150766985] [2023-11-26 11:47:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:01,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:01,717 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 11:47:01,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:01,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150766985] [2023-11-26 11:47:01,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150766985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:01,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:01,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:47:01,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825893896] [2023-11-26 11:47:01,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:01,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:01,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:01,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:01,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:01,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-26 11:47:01,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 11:47:01,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:01,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-26 11:47:01,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:01,996 INFO L124 PetriNetUnfolderBase]: 952/1765 cut-off events. [2023-11-26 11:47:01,997 INFO L125 PetriNetUnfolderBase]: For 510/511 co-relation queries the response was YES. [2023-11-26 11:47:02,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1765 events. 952/1765 cut-off events. For 510/511 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9674 event pairs, 401 based on Foata normal form. 12/1619 useless extension candidates. Maximal degree in co-relation 1032. Up to 1186 conditions per place. [2023-11-26 11:47:02,014 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 56 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-26 11:47:02,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 342 flow [2023-11-26 11:47:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2023-11-26 11:47:02,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6965174129353234 [2023-11-26 11:47:02,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2023-11-26 11:47:02,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2023-11-26 11:47:02,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:02,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2023-11-26 11:47:02,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 11:47:02,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:47:02,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:47:02,018 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 176 flow. Second operand 3 states and 140 transitions. [2023-11-26 11:47:02,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 342 flow [2023-11-26 11:47:02,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 337 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:02,025 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 178 flow [2023-11-26 11:47:02,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-11-26 11:47:02,026 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2023-11-26 11:47:02,026 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 178 flow [2023-11-26 11:47:02,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 11:47:02,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:02,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:02,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:47:02,027 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:02,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash 551374166, now seen corresponding path program 1 times [2023-11-26 11:47:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:02,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187177218] [2023-11-26 11:47:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:02,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:02,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:02,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187177218] [2023-11-26 11:47:02,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187177218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:02,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309568952] [2023-11-26 11:47:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:02,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:02,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:02,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:02,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:47:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:02,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 11:47:02,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:02,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:47:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:47:02,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-26 11:47:02,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:47:02,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:47:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:03,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:03,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309568952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:03,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:03,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-11-26 11:47:03,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108004116] [2023-11-26 11:47:03,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:03,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:47:03,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:47:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:47:03,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-26 11:47:03,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 178 flow. Second operand has 16 states, 16 states have (on average 28.875) internal successors, (462), 16 states have internal predecessors, (462), 0 states have call successors, (0), 0 states 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 11:47:03,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:03,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-26 11:47:03,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:06,165 INFO L124 PetriNetUnfolderBase]: 3845/7259 cut-off events. [2023-11-26 11:47:06,165 INFO L125 PetriNetUnfolderBase]: For 2946/2949 co-relation queries the response was YES. [2023-11-26 11:47:06,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16851 conditions, 7259 events. 3845/7259 cut-off events. For 2946/2949 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 47843 event pairs, 186 based on Foata normal form. 210/6823 useless extension candidates. Maximal degree in co-relation 6547. Up to 1293 conditions per place. [2023-11-26 11:47:06,301 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 330 selfloop transitions, 38 changer transitions 0/383 dead transitions. [2023-11-26 11:47:06,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 383 transitions, 1833 flow [2023-11-26 11:47:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:47:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-26 11:47:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 920 transitions. [2023-11-26 11:47:06,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538734896943852 [2023-11-26 11:47:06,310 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 920 transitions. [2023-11-26 11:47:06,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 920 transitions. [2023-11-26 11:47:06,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:06,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 920 transitions. [2023-11-26 11:47:06,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 43.80952380952381) internal successors, (920), 21 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 11:47:06,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 67.0) internal successors, (1474), 22 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states 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 11:47:06,323 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 67.0) internal successors, (1474), 22 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states 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 11:47:06,323 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 178 flow. Second operand 21 states and 920 transitions. [2023-11-26 11:47:06,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 383 transitions, 1833 flow [2023-11-26 11:47:06,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 383 transitions, 1830 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:06,342 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 538 flow [2023-11-26 11:47:06,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=538, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2023-11-26 11:47:06,344 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 32 predicate places. [2023-11-26 11:47:06,344 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 538 flow [2023-11-26 11:47:06,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 28.875) internal successors, (462), 16 states have internal predecessors, (462), 0 states have call successors, (0), 0 states 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 11:47:06,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:06,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:06,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:06,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:06,552 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:06,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash -758325483, now seen corresponding path program 1 times [2023-11-26 11:47:06,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:06,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961269148] [2023-11-26 11:47:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:06,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:06,682 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 11:47:06,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:06,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961269148] [2023-11-26 11:47:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961269148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:06,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:06,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:47:06,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377519058] [2023-11-26 11:47:06,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:06,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:06,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:06,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:06,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:06,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-26 11:47:06,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 538 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 11:47:06,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:06,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-26 11:47:06,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:07,342 INFO L124 PetriNetUnfolderBase]: 1685/3555 cut-off events. [2023-11-26 11:47:07,342 INFO L125 PetriNetUnfolderBase]: For 4120/4120 co-relation queries the response was YES. [2023-11-26 11:47:07,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9423 conditions, 3555 events. 1685/3555 cut-off events. For 4120/4120 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 21552 event pairs, 359 based on Foata normal form. 226/3639 useless extension candidates. Maximal degree in co-relation 9255. Up to 2130 conditions per place. [2023-11-26 11:47:07,371 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 70 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2023-11-26 11:47:07,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 625 flow [2023-11-26 11:47:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-11-26 11:47:07,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6368159203980099 [2023-11-26 11:47:07,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-11-26 11:47:07,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-11-26 11:47:07,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:07,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-11-26 11:47:07,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 11:47:07,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:47:07,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:47:07,375 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 538 flow. Second operand 3 states and 128 transitions. [2023-11-26 11:47:07,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 625 flow [2023-11-26 11:47:07,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 91 transitions, 575 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-26 11:47:07,409 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 403 flow [2023-11-26 11:47:07,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=403, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2023-11-26 11:47:07,412 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 25 predicate places. [2023-11-26 11:47:07,412 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 403 flow [2023-11-26 11:47:07,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 11:47:07,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:07,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:07,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:47:07,413 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:07,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:07,414 INFO L85 PathProgramCache]: Analyzing trace with hash 973962272, now seen corresponding path program 1 times [2023-11-26 11:47:07,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:07,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432208252] [2023-11-26 11:47:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:07,599 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 11:47:07,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:07,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432208252] [2023-11-26 11:47:07,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432208252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:07,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:07,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:47:07,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416514414] [2023-11-26 11:47:07,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:07,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:47:07,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:47:07,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:47:07,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-26 11:47:07,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 80 transitions, 403 flow. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 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 11:47:07,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:07,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-26 11:47:07,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:08,311 INFO L124 PetriNetUnfolderBase]: 1695/3527 cut-off events. [2023-11-26 11:47:08,311 INFO L125 PetriNetUnfolderBase]: For 1755/1755 co-relation queries the response was YES. [2023-11-26 11:47:08,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8972 conditions, 3527 events. 1695/3527 cut-off events. For 1755/1755 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 21476 event pairs, 958 based on Foata normal form. 0/3413 useless extension candidates. Maximal degree in co-relation 8478. Up to 2028 conditions per place. [2023-11-26 11:47:08,337 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 55 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2023-11-26 11:47:08,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 579 flow [2023-11-26 11:47:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:47:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:47:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2023-11-26 11:47:08,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5313432835820896 [2023-11-26 11:47:08,339 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 178 transitions. [2023-11-26 11:47:08,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 178 transitions. [2023-11-26 11:47:08,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:08,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 178 transitions. [2023-11-26 11:47:08,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 11:47:08,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 11:47:08,342 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 11:47:08,342 INFO L175 Difference]: Start difference. First operand has 87 places, 80 transitions, 403 flow. Second operand 5 states and 178 transitions. [2023-11-26 11:47:08,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 579 flow [2023-11-26 11:47:08,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 575 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:08,358 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 435 flow [2023-11-26 11:47:08,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=435, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2023-11-26 11:47:08,359 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 27 predicate places. [2023-11-26 11:47:08,359 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 435 flow [2023-11-26 11:47:08,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 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 11:47:08,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:08,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:08,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:47:08,360 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:08,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:08,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2068243037, now seen corresponding path program 1 times [2023-11-26 11:47:08,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:08,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33242337] [2023-11-26 11:47:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:08,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:08,764 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 11:47:08,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:08,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33242337] [2023-11-26 11:47:08,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33242337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:08,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:08,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:47:08,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190902358] [2023-11-26 11:47:08,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:08,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:47:08,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:47:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:47:08,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-26 11:47:08,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 435 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 11:47:08,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:08,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-26 11:47:08,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:09,943 INFO L124 PetriNetUnfolderBase]: 1885/3874 cut-off events. [2023-11-26 11:47:09,943 INFO L125 PetriNetUnfolderBase]: For 2829/2829 co-relation queries the response was YES. [2023-11-26 11:47:09,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10065 conditions, 3874 events. 1885/3874 cut-off events. For 2829/2829 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 23444 event pairs, 514 based on Foata normal form. 0/3728 useless extension candidates. Maximal degree in co-relation 8834. Up to 2791 conditions per place. [2023-11-26 11:47:09,978 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 115 selfloop transitions, 9 changer transitions 0/138 dead transitions. [2023-11-26 11:47:09,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 138 transitions, 894 flow [2023-11-26 11:47:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:47:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:47:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 303 transitions. [2023-11-26 11:47:09,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652985074626866 [2023-11-26 11:47:09,981 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 303 transitions. [2023-11-26 11:47:09,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 303 transitions. [2023-11-26 11:47:09,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:09,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 303 transitions. [2023-11-26 11:47:09,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 37.875) internal successors, (303), 8 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 11:47:09,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states 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 11:47:09,986 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states 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 11:47:09,986 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 435 flow. Second operand 8 states and 303 transitions. [2023-11-26 11:47:09,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 138 transitions, 894 flow [2023-11-26 11:47:10,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 138 transitions, 844 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:10,009 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 466 flow [2023-11-26 11:47:10,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=466, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2023-11-26 11:47:10,012 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 33 predicate places. [2023-11-26 11:47:10,013 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 466 flow [2023-11-26 11:47:10,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 11:47:10,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:10,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:10,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:47:10,024 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:10,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1840575689, now seen corresponding path program 1 times [2023-11-26 11:47:10,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:10,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178654622] [2023-11-26 11:47:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:10,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:10,548 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 11:47:10,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:10,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178654622] [2023-11-26 11:47:10,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178654622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:10,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:10,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:47:10,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591897573] [2023-11-26 11:47:10,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:10,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:47:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:10,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:47:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:47:10,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-26 11:47:10,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 466 flow. Second operand has 9 states, 9 states have (on average 30.11111111111111) internal successors, (271), 9 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 11:47:10,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:10,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-26 11:47:10,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:12,034 INFO L124 PetriNetUnfolderBase]: 2398/4998 cut-off events. [2023-11-26 11:47:12,035 INFO L125 PetriNetUnfolderBase]: For 3121/3121 co-relation queries the response was YES. [2023-11-26 11:47:12,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12866 conditions, 4998 events. 2398/4998 cut-off events. For 3121/3121 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 30381 event pairs, 493 based on Foata normal form. 0/4860 useless extension candidates. Maximal degree in co-relation 10314. Up to 2668 conditions per place. [2023-11-26 11:47:12,081 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 154 selfloop transitions, 10 changer transitions 0/180 dead transitions. [2023-11-26 11:47:12,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 1214 flow [2023-11-26 11:47:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:47:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:47:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 401 transitions. [2023-11-26 11:47:12,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5985074626865672 [2023-11-26 11:47:12,085 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 401 transitions. [2023-11-26 11:47:12,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 401 transitions. [2023-11-26 11:47:12,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:12,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 401 transitions. [2023-11-26 11:47:12,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 40.1) internal successors, (401), 10 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 11:47:12,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states 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 11:47:12,091 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states 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 11:47:12,091 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 466 flow. Second operand 10 states and 401 transitions. [2023-11-26 11:47:12,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 1214 flow [2023-11-26 11:47:12,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 180 transitions, 1205 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:12,115 INFO L231 Difference]: Finished difference. Result has 103 places, 87 transitions, 503 flow [2023-11-26 11:47:12,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=503, PETRI_PLACES=103, PETRI_TRANSITIONS=87} [2023-11-26 11:47:12,117 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 41 predicate places. [2023-11-26 11:47:12,117 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 87 transitions, 503 flow [2023-11-26 11:47:12,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.11111111111111) internal successors, (271), 9 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 11:47:12,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:12,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:12,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:47:12,118 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:12,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:12,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1087338323, now seen corresponding path program 1 times [2023-11-26 11:47:12,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:12,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780707934] [2023-11-26 11:47:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:12,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:12,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:12,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780707934] [2023-11-26 11:47:12,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780707934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:12,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:12,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:47:12,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047741704] [2023-11-26 11:47:12,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:12,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:12,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:12,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:12,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:12,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-26 11:47:12,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 87 transitions, 503 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:12,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:12,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-26 11:47:12,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:13,817 INFO L124 PetriNetUnfolderBase]: 3473/7303 cut-off events. [2023-11-26 11:47:13,817 INFO L125 PetriNetUnfolderBase]: For 5608/5608 co-relation queries the response was YES. [2023-11-26 11:47:13,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19211 conditions, 7303 events. 3473/7303 cut-off events. For 5608/5608 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 50529 event pairs, 1775 based on Foata normal form. 137/7216 useless extension candidates. Maximal degree in co-relation 15796. Up to 4392 conditions per place. [2023-11-26 11:47:13,881 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 128 selfloop transitions, 2 changer transitions 0/146 dead transitions. [2023-11-26 11:47:13,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 146 transitions, 1163 flow [2023-11-26 11:47:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-26 11:47:13,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7014925373134329 [2023-11-26 11:47:13,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-26 11:47:13,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-26 11:47:13,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:13,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-26 11:47:13,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:13,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:47:13,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 11:47:13,888 INFO L175 Difference]: Start difference. First operand has 103 places, 87 transitions, 503 flow. Second operand 3 states and 141 transitions. [2023-11-26 11:47:13,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 146 transitions, 1163 flow [2023-11-26 11:47:13,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 146 transitions, 1132 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-26 11:47:13,922 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 497 flow [2023-11-26 11:47:13,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=497, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2023-11-26 11:47:13,924 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 39 predicate places. [2023-11-26 11:47:13,924 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 497 flow [2023-11-26 11:47:13,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:13,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:13,925 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:13,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:47:13,925 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:13,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:13,925 INFO L85 PathProgramCache]: Analyzing trace with hash -963282203, now seen corresponding path program 1 times [2023-11-26 11:47:13,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:13,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241403201] [2023-11-26 11:47:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:13,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:14,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:14,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241403201] [2023-11-26 11:47:14,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241403201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:14,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079872018] [2023-11-26 11:47:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:14,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:14,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:14,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:14,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:47:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:14,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:47:14,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:14,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:14,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079872018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:14,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:14,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-26 11:47:14,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225977938] [2023-11-26 11:47:14,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:14,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:47:14,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:47:14,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:47:14,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-26 11:47:14,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 497 flow. Second operand has 9 states, 9 states have (on average 32.888888888888886) internal successors, (296), 9 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 11:47:14,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:14,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-26 11:47:14,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:17,108 INFO L124 PetriNetUnfolderBase]: 5982/12551 cut-off events. [2023-11-26 11:47:17,108 INFO L125 PetriNetUnfolderBase]: For 12787/12805 co-relation queries the response was YES. [2023-11-26 11:47:17,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35496 conditions, 12551 events. 5982/12551 cut-off events. For 12787/12805 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 90039 event pairs, 1652 based on Foata normal form. 352/12705 useless extension candidates. Maximal degree in co-relation 25191. Up to 2001 conditions per place. [2023-11-26 11:47:17,217 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 239 selfloop transitions, 49 changer transitions 0/303 dead transitions. [2023-11-26 11:47:17,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 303 transitions, 2135 flow [2023-11-26 11:47:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:47:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:47:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 455 transitions. [2023-11-26 11:47:17,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7545605306799337 [2023-11-26 11:47:17,221 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 455 transitions. [2023-11-26 11:47:17,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 455 transitions. [2023-11-26 11:47:17,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:17,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 455 transitions. [2023-11-26 11:47:17,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 50.55555555555556) internal successors, (455), 9 states have internal predecessors, (455), 0 states have call successors, (0), 0 states 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 11:47:17,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states 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 11:47:17,226 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states 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 11:47:17,226 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 497 flow. Second operand 9 states and 455 transitions. [2023-11-26 11:47:17,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 303 transitions, 2135 flow [2023-11-26 11:47:17,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 303 transitions, 2080 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:17,298 INFO L231 Difference]: Finished difference. Result has 114 places, 122 transitions, 898 flow [2023-11-26 11:47:17,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=898, PETRI_PLACES=114, PETRI_TRANSITIONS=122} [2023-11-26 11:47:17,299 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 52 predicate places. [2023-11-26 11:47:17,299 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 122 transitions, 898 flow [2023-11-26 11:47:17,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 32.888888888888886) internal successors, (296), 9 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 11:47:17,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:17,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:17,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:17,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:47:17,508 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:17,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:17,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1156038727, now seen corresponding path program 1 times [2023-11-26 11:47:17,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:17,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966207347] [2023-11-26 11:47:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:17,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:18,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:18,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966207347] [2023-11-26 11:47:18,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966207347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:18,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859086002] [2023-11-26 11:47:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:18,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:18,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:18,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:18,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:47:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:18,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 11:47:18,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:18,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:47:18,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859086002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:18,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:47:18,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 14 [2023-11-26 11:47:18,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763892635] [2023-11-26 11:47:18,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:18,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:47:18,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:18,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:47:18,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:47:18,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-26 11:47:18,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 122 transitions, 898 flow. Second operand has 9 states, 9 states have (on average 28.77777777777778) internal successors, (259), 9 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 11:47:18,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:18,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-26 11:47:18,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:21,293 INFO L124 PetriNetUnfolderBase]: 4683/9863 cut-off events. [2023-11-26 11:47:21,294 INFO L125 PetriNetUnfolderBase]: For 16121/16121 co-relation queries the response was YES. [2023-11-26 11:47:21,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29467 conditions, 9863 events. 4683/9863 cut-off events. For 16121/16121 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 65869 event pairs, 826 based on Foata normal form. 364/10035 useless extension candidates. Maximal degree in co-relation 22692. Up to 2668 conditions per place. [2023-11-26 11:47:21,400 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 121 selfloop transitions, 64 changer transitions 0/199 dead transitions. [2023-11-26 11:47:21,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 199 transitions, 1559 flow [2023-11-26 11:47:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:47:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:47:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 403 transitions. [2023-11-26 11:47:21,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5468113975576662 [2023-11-26 11:47:21,406 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 403 transitions. [2023-11-26 11:47:21,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 403 transitions. [2023-11-26 11:47:21,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:21,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 403 transitions. [2023-11-26 11:47:21,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 36.63636363636363) internal successors, (403), 11 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 11:47:21,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 67.0) internal successors, (804), 12 states have internal predecessors, (804), 0 states have call successors, (0), 0 states 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 11:47:21,412 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 67.0) internal successors, (804), 12 states have internal predecessors, (804), 0 states have call successors, (0), 0 states 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 11:47:21,413 INFO L175 Difference]: Start difference. First operand has 114 places, 122 transitions, 898 flow. Second operand 11 states and 403 transitions. [2023-11-26 11:47:21,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 199 transitions, 1559 flow [2023-11-26 11:47:21,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 199 transitions, 1520 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:21,495 INFO L231 Difference]: Finished difference. Result has 125 places, 125 transitions, 1129 flow [2023-11-26 11:47:21,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1129, PETRI_PLACES=125, PETRI_TRANSITIONS=125} [2023-11-26 11:47:21,496 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 63 predicate places. [2023-11-26 11:47:21,497 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 125 transitions, 1129 flow [2023-11-26 11:47:21,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 28.77777777777778) internal successors, (259), 9 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 11:47:21,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:21,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:21,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:21,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:47:21,704 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:21,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash -846743547, now seen corresponding path program 1 times [2023-11-26 11:47:21,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:21,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237940515] [2023-11-26 11:47:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:21,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:21,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:21,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237940515] [2023-11-26 11:47:21,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237940515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:21,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201730331] [2023-11-26 11:47:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:21,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:21,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:21,796 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:21,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:47:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:22,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:47:22,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:22,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:22,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201730331] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:22,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:22,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-26 11:47:22,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874923123] [2023-11-26 11:47:22,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:22,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:47:22,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:22,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:47:22,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:47:22,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-26 11:47:22,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 125 transitions, 1129 flow. Second operand has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 0 states have call successors, (0), 0 states 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 11:47:22,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:22,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-26 11:47:22,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:26,178 INFO L124 PetriNetUnfolderBase]: 12205/24123 cut-off events. [2023-11-26 11:47:26,178 INFO L125 PetriNetUnfolderBase]: For 57810/57922 co-relation queries the response was YES. [2023-11-26 11:47:26,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77353 conditions, 24123 events. 12205/24123 cut-off events. For 57810/57922 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 185574 event pairs, 1288 based on Foata normal form. 1545/25300 useless extension candidates. Maximal degree in co-relation 58248. Up to 6150 conditions per place. [2023-11-26 11:47:26,382 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 428 selfloop transitions, 6 changer transitions 0/452 dead transitions. [2023-11-26 11:47:26,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 452 transitions, 5387 flow [2023-11-26 11:47:26,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:47:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:47:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 284 transitions. [2023-11-26 11:47:26,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7064676616915423 [2023-11-26 11:47:26,389 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 284 transitions. [2023-11-26 11:47:26,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 284 transitions. [2023-11-26 11:47:26,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:26,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 284 transitions. [2023-11-26 11:47:26,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 11:47:26,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 11:47:26,395 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 11:47:26,395 INFO L175 Difference]: Start difference. First operand has 125 places, 125 transitions, 1129 flow. Second operand 6 states and 284 transitions. [2023-11-26 11:47:26,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 452 transitions, 5387 flow [2023-11-26 11:47:26,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 452 transitions, 5190 flow, removed 98 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:26,848 INFO L231 Difference]: Finished difference. Result has 133 places, 128 transitions, 1120 flow [2023-11-26 11:47:26,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1120, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2023-11-26 11:47:26,849 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 71 predicate places. [2023-11-26 11:47:26,849 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 1120 flow [2023-11-26 11:47:26,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 0 states have call successors, (0), 0 states 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 11:47:26,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:26,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:26,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:27,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:47:27,061 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:27,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:27,062 INFO L85 PathProgramCache]: Analyzing trace with hash -941486547, now seen corresponding path program 1 times [2023-11-26 11:47:27,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:27,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578839151] [2023-11-26 11:47:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:27,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:47:27,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:27,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578839151] [2023-11-26 11:47:27,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578839151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:27,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:27,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:47:27,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408039745] [2023-11-26 11:47:27,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:27,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:47:27,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:27,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:47:27,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:47:27,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-26 11:47:27,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 1120 flow. Second operand has 10 states, 10 states have (on average 30.6) internal successors, (306), 10 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 11:47:27,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:27,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-26 11:47:27,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:33,564 INFO L124 PetriNetUnfolderBase]: 12598/26906 cut-off events. [2023-11-26 11:47:33,565 INFO L125 PetriNetUnfolderBase]: For 63117/63117 co-relation queries the response was YES. [2023-11-26 11:47:33,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94621 conditions, 26906 events. 12598/26906 cut-off events. For 63117/63117 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 219104 event pairs, 2591 based on Foata normal form. 0/26705 useless extension candidates. Maximal degree in co-relation 74460. Up to 5463 conditions per place. [2023-11-26 11:47:33,760 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 160 selfloop transitions, 126 changer transitions 0/306 dead transitions. [2023-11-26 11:47:33,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 306 transitions, 3016 flow [2023-11-26 11:47:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:47:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-26 11:47:33,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 613 transitions. [2023-11-26 11:47:33,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381913959613697 [2023-11-26 11:47:33,763 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 613 transitions. [2023-11-26 11:47:33,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 613 transitions. [2023-11-26 11:47:33,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:33,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 613 transitions. [2023-11-26 11:47:33,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 36.05882352941177) internal successors, (613), 17 states have internal predecessors, (613), 0 states have call successors, (0), 0 states 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 11:47:33,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 67.0) internal successors, (1206), 18 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states 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 11:47:33,769 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 67.0) internal successors, (1206), 18 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states 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 11:47:33,769 INFO L175 Difference]: Start difference. First operand has 133 places, 128 transitions, 1120 flow. Second operand 17 states and 613 transitions. [2023-11-26 11:47:33,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 306 transitions, 3016 flow [2023-11-26 11:47:34,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 306 transitions, 2924 flow, removed 40 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:34,023 INFO L231 Difference]: Finished difference. Result has 152 places, 184 transitions, 2047 flow [2023-11-26 11:47:34,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2047, PETRI_PLACES=152, PETRI_TRANSITIONS=184} [2023-11-26 11:47:34,024 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 90 predicate places. [2023-11-26 11:47:34,025 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 184 transitions, 2047 flow [2023-11-26 11:47:34,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.6) internal successors, (306), 10 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 11:47:34,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:34,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:34,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:47:34,026 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 11:47:34,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:34,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1908632977, now seen corresponding path program 1 times [2023-11-26 11:47:34,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:34,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318211154] [2023-11-26 11:47:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:34,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:34,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:34,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318211154] [2023-11-26 11:47:34,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318211154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:34,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968224847] [2023-11-26 11:47:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:34,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:34,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:34,527 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:34,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec850d2-d57b-464a-b79b-1dc390914184/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:47:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:34,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 11:47:34,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:35,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:35,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:35,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-11-26 11:47:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:35,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968224847] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:35,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:35,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-26 11:47:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179014238] [2023-11-26 11:47:35,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:35,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 11:47:35,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 11:47:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:47:36,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-26 11:47:36,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 184 transitions, 2047 flow. Second operand has 26 states, 26 states have (on average 29.807692307692307) internal successors, (775), 26 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 11:47:36,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:36,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-26 11:47:36,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand