./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/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_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 91d7b70e505e7aef19ce206c76dac3b8838d1608e22286f0e4e4335d9f63c057 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:49:00,385 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:49:00,507 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 11:49:00,521 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:49:00,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:49:00,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:49:00,563 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:49:00,564 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:49:00,565 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:49:00,570 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:49:00,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:49:00,572 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:49:00,573 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:49:00,575 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:49:00,575 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:49:00,576 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:49:00,576 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:49:00,577 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:49:00,577 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:49:00,578 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:49:00,578 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:49:00,579 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:49:00,579 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:49:00,580 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:49:00,580 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 11:49:00,581 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:49:00,581 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:49:00,581 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:49:00,582 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:49:00,583 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:49:00,584 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:49:00,585 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:49:00,585 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:49:00,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:00,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:49:00,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:49:00,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:49:00,586 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:49:00,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:49:00,587 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:49:00,587 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:49:00,588 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:49:00,588 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:49:00,588 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:49:00,589 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_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91d7b70e505e7aef19ce206c76dac3b8838d1608e22286f0e4e4335d9f63c057 [2023-11-26 11:49:00,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:49:00,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:49:00,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:49:00,987 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:49:00,989 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:49:00,991 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2023-11-26 11:49:04,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:49:04,346 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:49:04,346 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2023-11-26 11:49:04,356 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/data/5198c2117/ac8386e45a67433e8e54e2232d85e3c2/FLAG849b3029a [2023-11-26 11:49:04,372 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/data/5198c2117/ac8386e45a67433e8e54e2232d85e3c2 [2023-11-26 11:49:04,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:49:04,376 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:49:04,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:49:04,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:49:04,384 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:49:04,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@587bd832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04, skipping insertion in model container [2023-11-26 11:49:04,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,413 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:49:04,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:04,699 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:49:04,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:04,741 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:04,743 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:04,752 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:49:04,752 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04 WrapperNode [2023-11-26 11:49:04,753 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:49:04,754 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:49:04,754 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:49:04,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:49:04,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,792 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,841 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 261 [2023-11-26 11:49:04,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:49:04,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:49:04,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:49:04,853 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:49:04,867 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,872 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,891 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 4, 2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-26 11:49:04,891 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,911 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,913 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:49:04,919 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:49:04,919 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:49:04,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:49:04,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (1/1) ... [2023-11-26 11:49:04,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:04,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:04,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:49:04,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:49:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:49:05,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:49:05,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:49:05,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:49:05,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:49:05,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:49:05,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:49:05,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:49:05,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:49:05,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:49:05,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:49:05,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:49:05,016 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:49:05,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:49:05,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:49:05,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:49:05,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 11:49:05,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 11:49:05,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:49:05,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:49:05,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:49:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:49:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:49:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:49:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:49:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:49:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:49:05,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:49:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:49:05,020 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 11:49:05,166 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:49:05,169 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:49:05,717 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:49:06,207 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:49:06,207 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:49:06,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:06 BoogieIcfgContainer [2023-11-26 11:49:06,209 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:49:06,212 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:49:06,213 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:49:06,216 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:49:06,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:49:04" (1/3) ... [2023-11-26 11:49:06,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ba3a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:06, skipping insertion in model container [2023-11-26 11:49:06,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:04" (2/3) ... [2023-11-26 11:49:06,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ba3a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:06, skipping insertion in model container [2023-11-26 11:49:06,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:06" (3/3) ... [2023-11-26 11:49:06,221 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2023-11-26 11:49:06,232 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:49:06,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:49:06,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-26 11:49:06,245 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:49:06,467 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 11:49:06,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 70 transitions, 161 flow [2023-11-26 11:49:06,570 INFO L124 PetriNetUnfolderBase]: 4/67 cut-off events. [2023-11-26 11:49:06,570 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 11:49:06,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 4/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 226 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-26 11:49:06,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 70 transitions, 161 flow [2023-11-26 11:49:06,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 65 transitions, 145 flow [2023-11-26 11:49:06,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:49:06,604 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@22ef37aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:49:06,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2023-11-26 11:49:06,608 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:49:06,609 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-26 11:49:06,609 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:49:06,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:06,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:49:06,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:06,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash 818064, now seen corresponding path program 1 times [2023-11-26 11:49:06,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:06,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919587501] [2023-11-26 11:49:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:06,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:06,970 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 11:49:06,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:06,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919587501] [2023-11-26 11:49:06,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919587501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:06,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:06,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:49:06,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759220670] [2023-11-26 11:49:06,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:06,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:49:06,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:07,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:49:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:07,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-26 11:49:07,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 11:49:07,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:07,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-26 11:49:07,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:08,394 INFO L124 PetriNetUnfolderBase]: 3107/4872 cut-off events. [2023-11-26 11:49:08,395 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-26 11:49:08,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9521 conditions, 4872 events. 3107/4872 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 32429 event pairs, 2653 based on Foata normal form. 1/2797 useless extension candidates. Maximal degree in co-relation 8588. Up to 4425 conditions per place. [2023-11-26 11:49:08,451 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 39 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-11-26 11:49:08,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 225 flow [2023-11-26 11:49:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:49:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:49:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2023-11-26 11:49:08,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2023-11-26 11:49:08,464 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 139 transitions. [2023-11-26 11:49:08,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 139 transitions. [2023-11-26 11:49:08,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:08,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 139 transitions. [2023-11-26 11:49:08,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:08,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 11:49:08,479 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 11:49:08,481 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 145 flow. Second operand 4 states and 139 transitions. [2023-11-26 11:49:08,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 225 flow [2023-11-26 11:49:08,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 216 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 11:49:08,512 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 153 flow [2023-11-26 11:49:08,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-11-26 11:49:08,518 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2023-11-26 11:49:08,518 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 153 flow [2023-11-26 11:49:08,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 11:49:08,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:08,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-26 11:49:08,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:49:08,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:08,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1398062230, now seen corresponding path program 1 times [2023-11-26 11:49:08,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:08,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985977719] [2023-11-26 11:49:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:08,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:08,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985977719] [2023-11-26 11:49:08,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985977719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:08,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923166645] [2023-11-26 11:49:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:08,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:08,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:08,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:49:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:08,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:49:08,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:08,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:08,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923166645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:08,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:49:08,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-26 11:49:08,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499915066] [2023-11-26 11:49:08,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:08,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:49:08,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:49:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:09,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-26 11:49:09,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 153 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 11:49:09,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:09,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-26 11:49:09,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:10,115 INFO L124 PetriNetUnfolderBase]: 3107/4871 cut-off events. [2023-11-26 11:49:10,120 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-26 11:49:10,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9449 conditions, 4871 events. 3107/4871 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 32400 event pairs, 2653 based on Foata normal form. 1/2797 useless extension candidates. Maximal degree in co-relation 9422. Up to 4420 conditions per place. [2023-11-26 11:49:10,170 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 35 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-11-26 11:49:10,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 233 flow [2023-11-26 11:49:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:49:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:49:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2023-11-26 11:49:10,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-26 11:49:10,177 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 175 transitions. [2023-11-26 11:49:10,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 175 transitions. [2023-11-26 11:49:10,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:10,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 175 transitions. [2023-11-26 11:49:10,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 11:49:10,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 11:49:10,185 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 11:49:10,185 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 153 flow. Second operand 6 states and 175 transitions. [2023-11-26 11:49:10,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 233 flow [2023-11-26 11:49:10,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:49:10,188 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 160 flow [2023-11-26 11:49:10,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-11-26 11:49:10,190 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-26 11:49:10,190 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 160 flow [2023-11-26 11:49:10,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 11:49:10,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:10,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:49:10,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:10,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:10,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:10,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1395210740, now seen corresponding path program 1 times [2023-11-26 11:49:10,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:10,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48643741] [2023-11-26 11:49:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:10,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:10,615 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 11:49:10,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:10,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48643741] [2023-11-26 11:49:10,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48643741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:10,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:10,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:10,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773583392] [2023-11-26 11:49:10,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:10,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:49:10,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:10,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:49:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:10,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2023-11-26 11:49:10,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 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 11:49:10,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:10,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2023-11-26 11:49:10,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:12,323 INFO L124 PetriNetUnfolderBase]: 4649/7417 cut-off events. [2023-11-26 11:49:12,324 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-26 11:49:12,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14339 conditions, 7417 events. 4649/7417 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 51979 event pairs, 3416 based on Foata normal form. 0/4436 useless extension candidates. Maximal degree in co-relation 10533. Up to 4922 conditions per place. [2023-11-26 11:49:12,397 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 86 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2023-11-26 11:49:12,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 449 flow [2023-11-26 11:49:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:49:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:49:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2023-11-26 11:49:12,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914285714285714 [2023-11-26 11:49:12,402 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 207 transitions. [2023-11-26 11:49:12,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 207 transitions. [2023-11-26 11:49:12,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:12,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 207 transitions. [2023-11-26 11:49:12,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 11:49:12,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:12,408 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:12,408 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 160 flow. Second operand 5 states and 207 transitions. [2023-11-26 11:49:12,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 449 flow [2023-11-26 11:49:12,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 427 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-26 11:49:12,415 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 163 flow [2023-11-26 11:49:12,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-11-26 11:49:12,417 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-11-26 11:49:12,418 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 163 flow [2023-11-26 11:49:12,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 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 11:49:12,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:12,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-26 11:49:12,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:49:12,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:12,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash -390255369, now seen corresponding path program 1 times [2023-11-26 11:49:12,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:12,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141669075] [2023-11-26 11:49:12,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:12,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:12,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:12,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141669075] [2023-11-26 11:49:12,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141669075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686680407] [2023-11-26 11:49:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:12,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:12,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:12,561 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:12,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:49:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:12,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:49:12,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:12,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:12,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686680407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:12,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:49:12,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-26 11:49:12,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656734425] [2023-11-26 11:49:12,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:12,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:49:12,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:12,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:49:12,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:49:12,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-26 11:49:12,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 163 flow. Second operand has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 11:49:12,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:12,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-26 11:49:12,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:14,247 INFO L124 PetriNetUnfolderBase]: 4298/6858 cut-off events. [2023-11-26 11:49:14,251 INFO L125 PetriNetUnfolderBase]: For 1181/1302 co-relation queries the response was YES. [2023-11-26 11:49:14,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14164 conditions, 6858 events. 4298/6858 cut-off events. For 1181/1302 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 48319 event pairs, 3706 based on Foata normal form. 3/4109 useless extension candidates. Maximal degree in co-relation 9804. Up to 6198 conditions per place. [2023-11-26 11:49:14,309 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 40 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2023-11-26 11:49:14,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 299 flow [2023-11-26 11:49:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:49:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:49:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2023-11-26 11:49:14,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914285714285714 [2023-11-26 11:49:14,312 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 274 transitions. [2023-11-26 11:49:14,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 274 transitions. [2023-11-26 11:49:14,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:14,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 274 transitions. [2023-11-26 11:49:14,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.4) internal successors, (274), 10 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 11:49:14,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:14,319 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:14,320 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 163 flow. Second operand 10 states and 274 transitions. [2023-11-26 11:49:14,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 299 flow [2023-11-26 11:49:14,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:49:14,324 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 232 flow [2023-11-26 11:49:14,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=232, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2023-11-26 11:49:14,326 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 8 predicate places. [2023-11-26 11:49:14,326 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 232 flow [2023-11-26 11:49:14,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 11:49:14,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:14,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:14,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:14,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:14,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:14,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:14,534 INFO L85 PathProgramCache]: Analyzing trace with hash -800307486, now seen corresponding path program 1 times [2023-11-26 11:49:14,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:14,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434126971] [2023-11-26 11:49:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:14,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:14,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:14,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434126971] [2023-11-26 11:49:14,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434126971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:14,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:14,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:14,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945397400] [2023-11-26 11:49:14,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:14,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:49:14,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:14,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:49:14,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:14,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2023-11-26 11:49:14,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 11:49:14,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:14,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2023-11-26 11:49:14,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:16,089 INFO L124 PetriNetUnfolderBase]: 3882/6204 cut-off events. [2023-11-26 11:49:16,090 INFO L125 PetriNetUnfolderBase]: For 708/869 co-relation queries the response was YES. [2023-11-26 11:49:16,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12574 conditions, 6204 events. 3882/6204 cut-off events. For 708/869 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 41469 event pairs, 3226 based on Foata normal form. 0/3691 useless extension candidates. Maximal degree in co-relation 12538. Up to 4975 conditions per place. [2023-11-26 11:49:16,159 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 81 selfloop transitions, 5 changer transitions 2/107 dead transitions. [2023-11-26 11:49:16,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 495 flow [2023-11-26 11:49:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:49:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:49:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2023-11-26 11:49:16,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2023-11-26 11:49:16,162 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 195 transitions. [2023-11-26 11:49:16,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 195 transitions. [2023-11-26 11:49:16,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:16,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 195 transitions. [2023-11-26 11:49:16,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 11:49:16,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:16,165 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:16,166 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 232 flow. Second operand 5 states and 195 transitions. [2023-11-26 11:49:16,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 495 flow [2023-11-26 11:49:16,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 484 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 11:49:16,171 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 246 flow [2023-11-26 11:49:16,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2023-11-26 11:49:16,172 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2023-11-26 11:49:16,172 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 246 flow [2023-11-26 11:49:16,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 11:49:16,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:16,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:16,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:49:16,174 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:16,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:16,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1370376206, now seen corresponding path program 1 times [2023-11-26 11:49:16,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:16,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250201325] [2023-11-26 11:49:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:16,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:16,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:16,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250201325] [2023-11-26 11:49:16,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250201325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:16,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871078173] [2023-11-26 11:49:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:16,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:16,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:16,473 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:16,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:49:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:16,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:49:16,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:16,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:49:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:16,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:16,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-26 11:49:16,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-26 11:49:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:16,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871078173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:16,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:49:16,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-26 11:49:16,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755661866] [2023-11-26 11:49:16,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:16,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:49:16,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:16,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:49:16,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:49:16,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 70 [2023-11-26 11:49:16,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 246 flow. Second operand has 11 states, 11 states have (on average 25.454545454545453) internal successors, (280), 11 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 11:49:16,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:16,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 70 [2023-11-26 11:49:16,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:18,761 INFO L124 PetriNetUnfolderBase]: 5414/9374 cut-off events. [2023-11-26 11:49:18,761 INFO L125 PetriNetUnfolderBase]: For 1628/2087 co-relation queries the response was YES. [2023-11-26 11:49:18,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18881 conditions, 9374 events. 5414/9374 cut-off events. For 1628/2087 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 71695 event pairs, 1786 based on Foata normal form. 0/5850 useless extension candidates. Maximal degree in co-relation 18843. Up to 2567 conditions per place. [2023-11-26 11:49:18,846 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 103 selfloop transitions, 16 changer transitions 1/140 dead transitions. [2023-11-26 11:49:18,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 140 transitions, 640 flow [2023-11-26 11:49:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:49:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 304 transitions. [2023-11-26 11:49:18,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-26 11:49:18,849 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 304 transitions. [2023-11-26 11:49:18,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 304 transitions. [2023-11-26 11:49:18,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:18,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 304 transitions. [2023-11-26 11:49:18,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 38.0) internal successors, (304), 8 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 11:49:18,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 11:49:18,853 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 11:49:18,853 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 246 flow. Second operand 8 states and 304 transitions. [2023-11-26 11:49:18,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 140 transitions, 640 flow [2023-11-26 11:49:18,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 140 transitions, 635 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:49:18,859 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 314 flow [2023-11-26 11:49:18,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2023-11-26 11:49:18,860 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2023-11-26 11:49:18,861 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 314 flow [2023-11-26 11:49:18,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.454545454545453) internal successors, (280), 11 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 11:49:18,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:18,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:18,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:49:19,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:19,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:19,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1370376202, now seen corresponding path program 1 times [2023-11-26 11:49:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:19,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040607345] [2023-11-26 11:49:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:19,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:19,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040607345] [2023-11-26 11:49:19,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040607345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:19,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:19,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:49:19,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989209913] [2023-11-26 11:49:19,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:19,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:19,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:19,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:19,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2023-11-26 11:49:19,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 314 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 11:49:19,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:19,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2023-11-26 11:49:19,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:21,130 INFO L124 PetriNetUnfolderBase]: 5894/10358 cut-off events. [2023-11-26 11:49:21,130 INFO L125 PetriNetUnfolderBase]: For 4632/4967 co-relation queries the response was YES. [2023-11-26 11:49:21,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23655 conditions, 10358 events. 5894/10358 cut-off events. For 4632/4967 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 82284 event pairs, 2056 based on Foata normal form. 0/6978 useless extension candidates. Maximal degree in co-relation 23614. Up to 5063 conditions per place. [2023-11-26 11:49:21,273 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 83 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-11-26 11:49:21,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 104 transitions, 537 flow [2023-11-26 11:49:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:49:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-26 11:49:21,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6619047619047619 [2023-11-26 11:49:21,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-26 11:49:21,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-26 11:49:21,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:21,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-26 11:49:21,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:21,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 11:49:21,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 11:49:21,282 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 314 flow. Second operand 3 states and 139 transitions. [2023-11-26 11:49:21,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 104 transitions, 537 flow [2023-11-26 11:49:21,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 104 transitions, 520 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-26 11:49:21,300 INFO L231 Difference]: Finished difference. Result has 88 places, 79 transitions, 299 flow [2023-11-26 11:49:21,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=88, PETRI_TRANSITIONS=79} [2023-11-26 11:49:21,302 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-11-26 11:49:21,302 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 299 flow [2023-11-26 11:49:21,302 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 11:49:21,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:21,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:21,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:49:21,303 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:21,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:21,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1370376205, now seen corresponding path program 1 times [2023-11-26 11:49:21,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:21,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162474728] [2023-11-26 11:49:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:21,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:21,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:21,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162474728] [2023-11-26 11:49:21,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162474728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:21,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871517950] [2023-11-26 11:49:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:21,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:21,755 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:21,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:49:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:21,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:49:21,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:21,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:49:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:21,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:22,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-26 11:49:22,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-26 11:49:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871517950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:22,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:49:22,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-26 11:49:22,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400121841] [2023-11-26 11:49:22,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:22,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:49:22,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:22,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:49:22,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:49:22,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 70 [2023-11-26 11:49:22,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 11:49:22,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:22,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 70 [2023-11-26 11:49:22,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:23,532 INFO L124 PetriNetUnfolderBase]: 4832/8283 cut-off events. [2023-11-26 11:49:23,532 INFO L125 PetriNetUnfolderBase]: For 4121/4561 co-relation queries the response was YES. [2023-11-26 11:49:23,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19614 conditions, 8283 events. 4832/8283 cut-off events. For 4121/4561 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 62519 event pairs, 1494 based on Foata normal form. 0/5581 useless extension candidates. Maximal degree in co-relation 19573. Up to 3337 conditions per place. [2023-11-26 11:49:23,645 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 100 selfloop transitions, 16 changer transitions 1/138 dead transitions. [2023-11-26 11:49:23,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 669 flow [2023-11-26 11:49:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:49:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 301 transitions. [2023-11-26 11:49:23,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2023-11-26 11:49:23,648 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 301 transitions. [2023-11-26 11:49:23,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 301 transitions. [2023-11-26 11:49:23,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:23,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 301 transitions. [2023-11-26 11:49:23,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 11:49:23,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 11:49:23,653 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 11:49:23,654 INFO L175 Difference]: Start difference. First operand has 88 places, 79 transitions, 299 flow. Second operand 8 states and 301 transitions. [2023-11-26 11:49:23,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 669 flow [2023-11-26 11:49:23,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 138 transitions, 667 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:49:23,666 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 325 flow [2023-11-26 11:49:23,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2023-11-26 11:49:23,667 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 23 predicate places. [2023-11-26 11:49:23,667 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 325 flow [2023-11-26 11:49:23,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 11:49:23,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:23,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:23,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 11:49:23,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:23,875 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:23,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash -311055647, now seen corresponding path program 1 times [2023-11-26 11:49:23,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:23,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361875375] [2023-11-26 11:49:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:23,994 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 11:49:23,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:23,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361875375] [2023-11-26 11:49:23,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361875375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:23,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:23,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:23,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124633898] [2023-11-26 11:49:23,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:23,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:49:23,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:49:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:24,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2023-11-26 11:49:24,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:49:24,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:24,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2023-11-26 11:49:24,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:25,253 INFO L124 PetriNetUnfolderBase]: 5089/8187 cut-off events. [2023-11-26 11:49:25,253 INFO L125 PetriNetUnfolderBase]: For 7467/8023 co-relation queries the response was YES. [2023-11-26 11:49:25,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21023 conditions, 8187 events. 5089/8187 cut-off events. For 7467/8023 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 56771 event pairs, 4410 based on Foata normal form. 0/5493 useless extension candidates. Maximal degree in co-relation 20981. Up to 7067 conditions per place. [2023-11-26 11:49:25,339 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 51 selfloop transitions, 2 changer transitions 26/99 dead transitions. [2023-11-26 11:49:25,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 547 flow [2023-11-26 11:49:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:49:25,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:49:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2023-11-26 11:49:25,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228571428571429 [2023-11-26 11:49:25,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 183 transitions. [2023-11-26 11:49:25,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 183 transitions. [2023-11-26 11:49:25,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:25,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 183 transitions. [2023-11-26 11:49:25,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 11:49:25,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:25,348 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:25,348 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 325 flow. Second operand 5 states and 183 transitions. [2023-11-26 11:49:25,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 547 flow [2023-11-26 11:49:25,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 99 transitions, 532 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 11:49:25,358 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 292 flow [2023-11-26 11:49:25,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2023-11-26 11:49:25,361 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 24 predicate places. [2023-11-26 11:49:25,361 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 292 flow [2023-11-26 11:49:25,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:49:25,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:25,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:25,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:49:25,362 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:25,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:25,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1590843208, now seen corresponding path program 1 times [2023-11-26 11:49:25,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:25,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945723345] [2023-11-26 11:49:25,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:25,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:25,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:25,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945723345] [2023-11-26 11:49:25,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945723345] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:25,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024878514] [2023-11-26 11:49:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:25,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:25,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:25,679 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:25,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:49:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:25,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:49:25,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:25,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:49:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:25,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:25,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-26 11:49:25,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-26 11:49:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:26,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024878514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:26,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:49:26,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-26 11:49:26,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851888275] [2023-11-26 11:49:26,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:26,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:49:26,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:26,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:49:26,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:49:26,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 70 [2023-11-26 11:49:26,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 292 flow. Second operand has 11 states, 11 states have (on average 25.818181818181817) internal successors, (284), 11 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 11:49:26,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:26,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 70 [2023-11-26 11:49:26,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:28,121 INFO L124 PetriNetUnfolderBase]: 7413/13029 cut-off events. [2023-11-26 11:49:28,122 INFO L125 PetriNetUnfolderBase]: For 9266/10369 co-relation queries the response was YES. [2023-11-26 11:49:28,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31826 conditions, 13029 events. 7413/13029 cut-off events. For 9266/10369 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 104385 event pairs, 2291 based on Foata normal form. 0/8858 useless extension candidates. Maximal degree in co-relation 31797. Up to 3890 conditions per place. [2023-11-26 11:49:28,266 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 91 selfloop transitions, 15 changer transitions 0/127 dead transitions. [2023-11-26 11:49:28,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 127 transitions, 728 flow [2023-11-26 11:49:28,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:49:28,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2023-11-26 11:49:28,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017857142857143 [2023-11-26 11:49:28,271 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 281 transitions. [2023-11-26 11:49:28,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 281 transitions. [2023-11-26 11:49:28,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:28,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 281 transitions. [2023-11-26 11:49:28,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 35.125) internal successors, (281), 8 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 11:49:28,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 11:49:28,277 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 11:49:28,278 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 292 flow. Second operand 8 states and 281 transitions. [2023-11-26 11:49:28,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 127 transitions, 728 flow [2023-11-26 11:49:28,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 127 transitions, 688 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-11-26 11:49:28,302 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 339 flow [2023-11-26 11:49:28,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2023-11-26 11:49:28,305 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2023-11-26 11:49:28,306 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 339 flow [2023-11-26 11:49:28,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.818181818181817) internal successors, (284), 11 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 11:49:28,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:28,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:28,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:28,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:28,514 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:28,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1590843211, now seen corresponding path program 1 times [2023-11-26 11:49:28,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:28,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959300271] [2023-11-26 11:49:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:28,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:28,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:28,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959300271] [2023-11-26 11:49:28,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959300271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:28,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:28,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:49:28,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031912] [2023-11-26 11:49:28,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:28,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:28,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:28,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:28,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-26 11:49:28,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 11:49:28,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:28,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-26 11:49:28,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:31,364 INFO L124 PetriNetUnfolderBase]: 12087/20902 cut-off events. [2023-11-26 11:49:31,364 INFO L125 PetriNetUnfolderBase]: For 15977/15977 co-relation queries the response was YES. [2023-11-26 11:49:31,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54946 conditions, 20902 events. 12087/20902 cut-off events. For 15977/15977 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 177907 event pairs, 3860 based on Foata normal form. 0/15212 useless extension candidates. Maximal degree in co-relation 54910. Up to 11392 conditions per place. [2023-11-26 11:49:31,553 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 93 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2023-11-26 11:49:31,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 118 transitions, 699 flow [2023-11-26 11:49:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:49:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-26 11:49:31,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6619047619047619 [2023-11-26 11:49:31,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-26 11:49:31,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-26 11:49:31,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:31,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-26 11:49:31,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:31,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 11:49:31,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 11:49:31,561 INFO L175 Difference]: Start difference. First operand has 91 places, 79 transitions, 339 flow. Second operand 3 states and 139 transitions. [2023-11-26 11:49:31,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 118 transitions, 699 flow [2023-11-26 11:49:31,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 689 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:49:31,582 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 384 flow [2023-11-26 11:49:31,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2023-11-26 11:49:31,583 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2023-11-26 11:49:31,583 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 384 flow [2023-11-26 11:49:31,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 11:49:31,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:31,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:31,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:49:31,585 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:31,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:31,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1590843209, now seen corresponding path program 1 times [2023-11-26 11:49:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:31,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439330334] [2023-11-26 11:49:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:31,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:31,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:31,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439330334] [2023-11-26 11:49:31,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439330334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:31,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221032041] [2023-11-26 11:49:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:31,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:31,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:31,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:31,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:49:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:32,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:49:32,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:32,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:49:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:32,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:32,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-26 11:49:32,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-26 11:49:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:32,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221032041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:32,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:49:32,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-26 11:49:32,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623926261] [2023-11-26 11:49:32,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:32,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:49:32,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:49:32,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:49:32,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 70 [2023-11-26 11:49:32,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 384 flow. Second operand has 11 states, 11 states have (on average 25.818181818181817) internal successors, (284), 11 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 11:49:32,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:32,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 70 [2023-11-26 11:49:32,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:34,969 INFO L124 PetriNetUnfolderBase]: 9445/16956 cut-off events. [2023-11-26 11:49:34,969 INFO L125 PetriNetUnfolderBase]: For 18402/18422 co-relation queries the response was YES. [2023-11-26 11:49:35,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47844 conditions, 16956 events. 9445/16956 cut-off events. For 18402/18422 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 147405 event pairs, 2487 based on Foata normal form. 0/14066 useless extension candidates. Maximal degree in co-relation 47808. Up to 4619 conditions per place. [2023-11-26 11:49:35,132 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 94 selfloop transitions, 16 changer transitions 0/133 dead transitions. [2023-11-26 11:49:35,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 814 flow [2023-11-26 11:49:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:49:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 280 transitions. [2023-11-26 11:49:35,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-26 11:49:35,135 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 280 transitions. [2023-11-26 11:49:35,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 280 transitions. [2023-11-26 11:49:35,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:35,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 280 transitions. [2023-11-26 11:49:35,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 11:49:35,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 11:49:35,141 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 11:49:35,142 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 384 flow. Second operand 8 states and 280 transitions. [2023-11-26 11:49:35,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 814 flow [2023-11-26 11:49:35,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 798 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:49:35,185 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 400 flow [2023-11-26 11:49:35,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=400, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2023-11-26 11:49:35,189 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 25 predicate places. [2023-11-26 11:49:35,189 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 400 flow [2023-11-26 11:49:35,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.818181818181817) internal successors, (284), 11 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 11:49:35,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:35,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:35,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:35,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:49:35,406 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:35,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1590843212, now seen corresponding path program 1 times [2023-11-26 11:49:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:35,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963965295] [2023-11-26 11:49:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:35,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:35,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:35,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963965295] [2023-11-26 11:49:35,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963965295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:35,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:35,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:49:35,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364516644] [2023-11-26 11:49:35,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:35,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:35,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:35,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:35,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:35,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-26 11:49:35,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 11:49:35,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:35,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-26 11:49:35,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:37,867 INFO L124 PetriNetUnfolderBase]: 10790/19021 cut-off events. [2023-11-26 11:49:37,867 INFO L125 PetriNetUnfolderBase]: For 23799/23829 co-relation queries the response was YES. [2023-11-26 11:49:37,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55232 conditions, 19021 events. 10790/19021 cut-off events. For 23799/23829 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 162264 event pairs, 2153 based on Foata normal form. 256/15643 useless extension candidates. Maximal degree in co-relation 55194. Up to 13294 conditions per place. [2023-11-26 11:49:38,005 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 89 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2023-11-26 11:49:38,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 111 transitions, 708 flow [2023-11-26 11:49:38,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:49:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-26 11:49:38,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-26 11:49:38,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-26 11:49:38,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-26 11:49:38,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:38,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-26 11:49:38,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 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 11:49:38,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 11:49:38,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 11:49:38,009 INFO L175 Difference]: Start difference. First operand has 96 places, 83 transitions, 400 flow. Second operand 3 states and 133 transitions. [2023-11-26 11:49:38,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 111 transitions, 708 flow [2023-11-26 11:49:38,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 111 transitions, 693 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 11:49:38,025 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 412 flow [2023-11-26 11:49:38,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2023-11-26 11:49:38,026 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 23 predicate places. [2023-11-26 11:49:38,027 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 412 flow [2023-11-26 11:49:38,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 11:49:38,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:38,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:38,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:49:38,028 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:38,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:38,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1212427316, now seen corresponding path program 1 times [2023-11-26 11:49:38,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:38,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157675423] [2023-11-26 11:49:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:38,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:49:38,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:38,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157675423] [2023-11-26 11:49:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157675423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:38,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:38,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595232646] [2023-11-26 11:49:38,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:38,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:49:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:49:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:38,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 70 [2023-11-26 11:49:38,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 412 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 11:49:38,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:38,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 70 [2023-11-26 11:49:38,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:40,626 INFO L124 PetriNetUnfolderBase]: 12533/20273 cut-off events. [2023-11-26 11:49:40,627 INFO L125 PetriNetUnfolderBase]: For 23359/23425 co-relation queries the response was YES. [2023-11-26 11:49:40,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60725 conditions, 20273 events. 12533/20273 cut-off events. For 23359/23425 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 160069 event pairs, 8561 based on Foata normal form. 698/16841 useless extension candidates. Maximal degree in co-relation 60688. Up to 14637 conditions per place. [2023-11-26 11:49:40,795 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 118 selfloop transitions, 4 changer transitions 0/144 dead transitions. [2023-11-26 11:49:40,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 144 transitions, 938 flow [2023-11-26 11:49:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:49:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:49:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 173 transitions. [2023-11-26 11:49:40,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2023-11-26 11:49:40,797 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 173 transitions. [2023-11-26 11:49:40,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 173 transitions. [2023-11-26 11:49:40,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:49:40,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 173 transitions. [2023-11-26 11:49:40,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 11:49:40,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 11:49:40,800 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 11:49:40,800 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 412 flow. Second operand 4 states and 173 transitions. [2023-11-26 11:49:40,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 144 transitions, 938 flow [2023-11-26 11:49:40,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 144 transitions, 935 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:49:40,823 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 430 flow [2023-11-26 11:49:40,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2023-11-26 11:49:40,824 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 27 predicate places. [2023-11-26 11:49:40,824 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 430 flow [2023-11-26 11:49:40,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 11:49:40,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:49:40,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:40,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:49:40,825 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:49:40,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:40,826 INFO L85 PathProgramCache]: Analyzing trace with hash -222742074, now seen corresponding path program 1 times [2023-11-26 11:49:40,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:40,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977958729] [2023-11-26 11:49:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:40,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:41,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:41,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977958729] [2023-11-26 11:49:41,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977958729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:41,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362582776] [2023-11-26 11:49:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:41,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:41,209 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:41,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e1039ab-988a-43c5-928e-2e66fd9eaaa2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:49:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:41,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:49:41,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:41,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-26 11:49:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:41,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:42,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-26 11:49:42,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-26 11:49:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:42,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362582776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:42,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:49:42,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-26 11:49:42,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563123764] [2023-11-26 11:49:42,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:42,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:49:42,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:49:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:49:42,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 70 [2023-11-26 11:49:42,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 430 flow. Second operand has 20 states, 20 states have (on average 22.8) internal successors, (456), 20 states have internal predecessors, (456), 0 states have call successors, (0), 0 states 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 11:49:42,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:49:42,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 70 [2023-11-26 11:49:42,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:49:53,352 INFO L124 PetriNetUnfolderBase]: 36283/60784 cut-off events. [2023-11-26 11:49:53,352 INFO L125 PetriNetUnfolderBase]: For 90778/90960 co-relation queries the response was YES.