./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/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_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/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_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/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 5dd003755f1e361f3bbf00c3bfecbc1131b6df98a7806f5bb08971966b13d6ac --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:57:07,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:57:07,876 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 11:57:07,882 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:57:07,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:57:07,910 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:57:07,910 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:57:07,911 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:57:07,912 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:57:07,912 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:57:07,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:57:07,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:57:07,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:57:07,915 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:57:07,916 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:57:07,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:57:07,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:57:07,923 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:57:07,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:57:07,924 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:57:07,926 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:57:07,929 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:57:07,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:57:07,930 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:57:07,931 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 11:57:07,931 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:57:07,932 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:57:07,932 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:57:07,932 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:57:07,933 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:57:07,935 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:57:07,935 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:57:07,935 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:57:07,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:07,936 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:57:07,936 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:57:07,936 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:57:07,937 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:57:07,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:57:07,937 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:57:07,937 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:57:07,938 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:57:07,939 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:57:07,939 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:57:07,939 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_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dd003755f1e361f3bbf00c3bfecbc1131b6df98a7806f5bb08971966b13d6ac [2023-11-26 11:57:08,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:57:08,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:57:08,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:57:08,268 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:57:08,269 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:57:08,270 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-26 11:57:11,421 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:57:11,711 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:57:11,712 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-26 11:57:11,724 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/data/59978d3d1/efcf728d8f5247efb900a3e8c99eb0f2/FLAG2e08046df [2023-11-26 11:57:11,741 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/data/59978d3d1/efcf728d8f5247efb900a3e8c99eb0f2 [2023-11-26 11:57:11,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:57:11,746 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:57:11,747 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:11,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:57:11,754 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:57:11,754 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:11" (1/1) ... [2023-11-26 11:57:11,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed8457c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:11, skipping insertion in model container [2023-11-26 11:57:11,756 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:11" (1/1) ... [2023-11-26 11:57:11,806 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:57:12,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:12,057 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:57:12,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:12,112 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:57:12,113 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:57:12,122 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:57:12,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12 WrapperNode [2023-11-26 11:57:12,123 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:12,124 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:12,124 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:57:12,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:57:12,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,146 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,188 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 292 [2023-11-26 11:57:12,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:12,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:57:12,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:57:12,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:57:12,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,214 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,235 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 7, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 2, 1]. [2023-11-26 11:57:12,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,236 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,249 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,254 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,257 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,260 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:57:12,267 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:57:12,267 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:57:12,267 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:57:12,268 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (1/1) ... [2023-11-26 11:57:12,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:12,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:12,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:57:12,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:57:12,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:57:12,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:57:12,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:57:12,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:57:12,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:57:12,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:57:12,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:57:12,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:57:12,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:57:12,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:57:12,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:57:12,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:57:12,394 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:57:12,395 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:57:12,395 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:57:12,395 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:57:12,395 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 11:57:12,395 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 11:57:12,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:57:12,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:57:12,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:57:12,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:57:12,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:57:12,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:57:12,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:57:12,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:57:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:57:12,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:57:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:57:12,400 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 11:57:12,536 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:57:12,538 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:57:13,063 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:57:13,572 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:57:13,572 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-26 11:57:13,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:13 BoogieIcfgContainer [2023-11-26 11:57:13,574 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:57:13,578 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:57:13,578 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:57:13,581 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:57:13,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:57:11" (1/3) ... [2023-11-26 11:57:13,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510500c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:13, skipping insertion in model container [2023-11-26 11:57:13,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:12" (2/3) ... [2023-11-26 11:57:13,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510500c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:13, skipping insertion in model container [2023-11-26 11:57:13,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:13" (3/3) ... [2023-11-26 11:57:13,586 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-11-26 11:57:13,597 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:57:13,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:57:13,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-26 11:57:13,609 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:57:13,730 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 11:57:13,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 72 transitions, 165 flow [2023-11-26 11:57:13,841 INFO L124 PetriNetUnfolderBase]: 7/69 cut-off events. [2023-11-26 11:57:13,841 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 11:57:13,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 69 events. 7/69 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-11-26 11:57:13,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 72 transitions, 165 flow [2023-11-26 11:57:13,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 67 transitions, 149 flow [2023-11-26 11:57:13,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:57:13,894 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;@e2a8cd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:57:13,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-26 11:57:13,899 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:57:13,900 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-26 11:57:13,900 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:57:13,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:13,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:57:13,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:13,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:13,908 INFO L85 PathProgramCache]: Analyzing trace with hash 832503, now seen corresponding path program 1 times [2023-11-26 11:57:13,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:13,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351962951] [2023-11-26 11:57:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:13,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:14,308 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 11:57:14,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:14,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351962951] [2023-11-26 11:57:14,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351962951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:14,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:14,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:14,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646572630] [2023-11-26 11:57:14,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:14,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:14,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:14,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:14,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2023-11-26 11:57:14,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:14,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:14,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2023-11-26 11:57:14,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:15,501 INFO L124 PetriNetUnfolderBase]: 2537/4410 cut-off events. [2023-11-26 11:57:15,502 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-11-26 11:57:15,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8155 conditions, 4410 events. 2537/4410 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 29703 event pairs, 2257 based on Foata normal form. 302/3530 useless extension candidates. Maximal degree in co-relation 7490. Up to 3518 conditions per place. [2023-11-26 11:57:15,563 INFO L140 encePairwiseOnDemand]: 54/72 looper letters, 41 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2023-11-26 11:57:15,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 243 flow [2023-11-26 11:57:15,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:57:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2023-11-26 11:57:15,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965277777777778 [2023-11-26 11:57:15,583 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 143 transitions. [2023-11-26 11:57:15,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 143 transitions. [2023-11-26 11:57:15,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:15,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 143 transitions. [2023-11-26 11:57:15,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:15,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:15,603 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:15,606 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 149 flow. Second operand 4 states and 143 transitions. [2023-11-26 11:57:15,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 243 flow [2023-11-26 11:57:15,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 234 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 11:57:15,639 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 186 flow [2023-11-26 11:57:15,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-11-26 11:57:15,647 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -4 predicate places. [2023-11-26 11:57:15,647 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 186 flow [2023-11-26 11:57:15,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:15,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:15,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-26 11:57:15,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:57:15,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:15,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash -967845570, now seen corresponding path program 1 times [2023-11-26 11:57:15,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:15,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547743245] [2023-11-26 11:57:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:15,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:15,931 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 11:57:15,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:15,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547743245] [2023-11-26 11:57:15,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547743245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:15,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596086684] [2023-11-26 11:57:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:15,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:15,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:15,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:57:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:16,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:57:16,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:16,183 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 11:57:16,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:16,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596086684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:16,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:57:16,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-26 11:57:16,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369263182] [2023-11-26 11:57:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:16,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:57:16,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:16,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:57:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:57:16,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2023-11-26 11:57:16,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:16,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:16,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2023-11-26 11:57:16,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:17,136 INFO L124 PetriNetUnfolderBase]: 2537/4408 cut-off events. [2023-11-26 11:57:17,137 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-26 11:57:17,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8109 conditions, 4408 events. 2537/4408 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 29775 event pairs, 2257 based on Foata normal form. 2/3231 useless extension candidates. Maximal degree in co-relation 8059. Up to 3508 conditions per place. [2023-11-26 11:57:17,193 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 34 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2023-11-26 11:57:17,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 270 flow [2023-11-26 11:57:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:57:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:57:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2023-11-26 11:57:17,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2023-11-26 11:57:17,197 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 174 transitions. [2023-11-26 11:57:17,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 174 transitions. [2023-11-26 11:57:17,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:17,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 174 transitions. [2023-11-26 11:57:17,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:17,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:17,201 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:17,202 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 186 flow. Second operand 6 states and 174 transitions. [2023-11-26 11:57:17,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 270 flow [2023-11-26 11:57:17,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:57:17,205 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 202 flow [2023-11-26 11:57:17,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-11-26 11:57:17,207 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2023-11-26 11:57:17,207 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 202 flow [2023-11-26 11:57:17,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:17,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:17,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:17,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:17,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:17,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:17,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:17,417 INFO L85 PathProgramCache]: Analyzing trace with hash 89854251, now seen corresponding path program 1 times [2023-11-26 11:57:17,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:17,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478024281] [2023-11-26 11:57:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:17,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:17,685 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 11:57:17,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:17,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478024281] [2023-11-26 11:57:17,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478024281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:17,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:17,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:17,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835772861] [2023-11-26 11:57:17,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:17,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:17,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:17,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:17,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2023-11-26 11:57:17,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:17,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:17,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2023-11-26 11:57:17,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:18,532 INFO L124 PetriNetUnfolderBase]: 2671/4674 cut-off events. [2023-11-26 11:57:18,532 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-26 11:57:18,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 4674 events. 2671/4674 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31399 event pairs, 2384 based on Foata normal form. 98/3634 useless extension candidates. Maximal degree in co-relation 8063. Up to 3516 conditions per place. [2023-11-26 11:57:18,586 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 58 selfloop transitions, 5 changer transitions 1/84 dead transitions. [2023-11-26 11:57:18,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 404 flow [2023-11-26 11:57:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:57:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:57:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2023-11-26 11:57:18,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-26 11:57:18,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 192 transitions. [2023-11-26 11:57:18,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 192 transitions. [2023-11-26 11:57:18,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:18,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 192 transitions. [2023-11-26 11:57:18,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:18,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:18,593 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:18,594 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 202 flow. Second operand 5 states and 192 transitions. [2023-11-26 11:57:18,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 404 flow [2023-11-26 11:57:18,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 362 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-26 11:57:18,598 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 215 flow [2023-11-26 11:57:18,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2023-11-26 11:57:18,599 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-11-26 11:57:18,600 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 215 flow [2023-11-26 11:57:18,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:18,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:18,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-26 11:57:18,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:57:18,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:18,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash 61559271, now seen corresponding path program 1 times [2023-11-26 11:57:18,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296201677] [2023-11-26 11:57:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:18,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:18,764 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 11:57:18,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:18,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296201677] [2023-11-26 11:57:18,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296201677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:18,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112819797] [2023-11-26 11:57:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:18,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:18,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:18,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:18,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:57:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:18,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:57:18,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:18,934 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 11:57:18,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:18,988 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 11:57:18,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112819797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:18,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:18,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-26 11:57:18,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164841484] [2023-11-26 11:57:18,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:18,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:57:18,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:18,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:57:18,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:57:19,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2023-11-26 11:57:19,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 215 flow. Second operand has 12 states, 12 states have (on average 22.083333333333332) internal successors, (265), 12 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:19,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:19,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2023-11-26 11:57:19,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:20,078 INFO L124 PetriNetUnfolderBase]: 2664/4756 cut-off events. [2023-11-26 11:57:20,079 INFO L125 PetriNetUnfolderBase]: For 428/428 co-relation queries the response was YES. [2023-11-26 11:57:20,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9503 conditions, 4756 events. 2664/4756 cut-off events. For 428/428 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 32999 event pairs, 2384 based on Foata normal form. 9/3587 useless extension candidates. Maximal degree in co-relation 8932. Up to 3745 conditions per place. [2023-11-26 11:57:20,143 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 39 selfloop transitions, 27 changer transitions 0/84 dead transitions. [2023-11-26 11:57:20,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 84 transitions, 431 flow [2023-11-26 11:57:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:57:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:57:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2023-11-26 11:57:20,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-11-26 11:57:20,147 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 280 transitions. [2023-11-26 11:57:20,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 280 transitions. [2023-11-26 11:57:20,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:20,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 280 transitions. [2023-11-26 11:57:20,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 28.0) internal successors, (280), 10 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 11:57:20,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,154 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,154 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 215 flow. Second operand 10 states and 280 transitions. [2023-11-26 11:57:20,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 84 transitions, 431 flow [2023-11-26 11:57:20,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 84 transitions, 427 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:20,160 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 383 flow [2023-11-26 11:57:20,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=383, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2023-11-26 11:57:20,162 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 11 predicate places. [2023-11-26 11:57:20,162 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 383 flow [2023-11-26 11:57:20,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.083333333333332) internal successors, (265), 12 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:20,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:20,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:20,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:20,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:20,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:20,381 INFO L85 PathProgramCache]: Analyzing trace with hash -9684238, now seen corresponding path program 1 times [2023-11-26 11:57:20,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:20,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491388366] [2023-11-26 11:57:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:20,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:20,677 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 11:57:20,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491388366] [2023-11-26 11:57:20,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491388366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:20,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739079995] [2023-11-26 11:57:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:20,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:20,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:20,682 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:20,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:57:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:20,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:57:20,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:20,856 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 11:57:20,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:20,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739079995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:20,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:57:20,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-26 11:57:20,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393977680] [2023-11-26 11:57:20,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:20,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:20,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:20,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:20,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2023-11-26 11:57:20,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 383 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:20,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2023-11-26 11:57:20,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:21,392 INFO L124 PetriNetUnfolderBase]: 1894/3453 cut-off events. [2023-11-26 11:57:21,393 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-11-26 11:57:21,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6719 conditions, 3453 events. 1894/3453 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 22507 event pairs, 1664 based on Foata normal form. 0/2859 useless extension candidates. Maximal degree in co-relation 6621. Up to 2696 conditions per place. [2023-11-26 11:57:21,437 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 60 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-11-26 11:57:21,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 493 flow [2023-11-26 11:57:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:57:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2023-11-26 11:57:21,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2023-11-26 11:57:21,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 113 transitions. [2023-11-26 11:57:21,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 113 transitions. [2023-11-26 11:57:21,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:21,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 113 transitions. [2023-11-26 11:57:21,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:21,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:21,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:21,443 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 383 flow. Second operand 3 states and 113 transitions. [2023-11-26 11:57:21,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 493 flow [2023-11-26 11:57:21,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 81 transitions, 457 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-26 11:57:21,449 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 337 flow [2023-11-26 11:57:21,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2023-11-26 11:57:21,451 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 7 predicate places. [2023-11-26 11:57:21,451 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 337 flow [2023-11-26 11:57:21,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:21,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:21,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:21,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:21,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:21,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:21,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 858587805, now seen corresponding path program 1 times [2023-11-26 11:57:21,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:21,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702862205] [2023-11-26 11:57:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:21,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:21,744 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 11:57:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702862205] [2023-11-26 11:57:21,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702862205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:21,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:21,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:57:21,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797268123] [2023-11-26 11:57:21,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:21,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:21,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:21,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:21,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:21,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2023-11-26 11:57:21,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 337 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:21,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:21,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2023-11-26 11:57:21,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:22,282 INFO L124 PetriNetUnfolderBase]: 1740/3211 cut-off events. [2023-11-26 11:57:22,282 INFO L125 PetriNetUnfolderBase]: For 439/439 co-relation queries the response was YES. [2023-11-26 11:57:22,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6337 conditions, 3211 events. 1740/3211 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19934 event pairs, 614 based on Foata normal form. 55/2764 useless extension candidates. Maximal degree in co-relation 6322. Up to 1849 conditions per place. [2023-11-26 11:57:22,318 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 74 selfloop transitions, 2 changer transitions 1/97 dead transitions. [2023-11-26 11:57:22,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 532 flow [2023-11-26 11:57:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:57:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-11-26 11:57:22,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-26 11:57:22,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-11-26 11:57:22,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-11-26 11:57:22,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:22,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-11-26 11:57:22,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,323 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 337 flow. Second operand 3 states and 128 transitions. [2023-11-26 11:57:22,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 532 flow [2023-11-26 11:57:22,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 531 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:22,331 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 342 flow [2023-11-26 11:57:22,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2023-11-26 11:57:22,336 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 9 predicate places. [2023-11-26 11:57:22,337 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 342 flow [2023-11-26 11:57:22,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:22,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:22,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:57:22,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:22,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:22,339 INFO L85 PathProgramCache]: Analyzing trace with hash -716589899, now seen corresponding path program 1 times [2023-11-26 11:57:22,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:22,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484198541] [2023-11-26 11:57:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:22,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,430 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 11:57:22,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:22,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484198541] [2023-11-26 11:57:22,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484198541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:22,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:22,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:22,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951607379] [2023-11-26 11:57:22,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:22,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:22,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:22,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2023-11-26 11:57:22,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 342 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:22,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2023-11-26 11:57:22,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:23,226 INFO L124 PetriNetUnfolderBase]: 2916/5136 cut-off events. [2023-11-26 11:57:23,226 INFO L125 PetriNetUnfolderBase]: For 920/939 co-relation queries the response was YES. [2023-11-26 11:57:23,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10773 conditions, 5136 events. 2916/5136 cut-off events. For 920/939 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 33425 event pairs, 1828 based on Foata normal form. 97/4709 useless extension candidates. Maximal degree in co-relation 10756. Up to 3184 conditions per place. [2023-11-26 11:57:23,279 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 97 selfloop transitions, 4 changer transitions 0/119 dead transitions. [2023-11-26 11:57:23,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 650 flow [2023-11-26 11:57:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:57:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 167 transitions. [2023-11-26 11:57:23,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5798611111111112 [2023-11-26 11:57:23,282 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 167 transitions. [2023-11-26 11:57:23,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 167 transitions. [2023-11-26 11:57:23,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:23,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 167 transitions. [2023-11-26 11:57:23,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,284 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,284 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 342 flow. Second operand 4 states and 167 transitions. [2023-11-26 11:57:23,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 650 flow [2023-11-26 11:57:23,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 646 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:23,289 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 369 flow [2023-11-26 11:57:23,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=369, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2023-11-26 11:57:23,291 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 13 predicate places. [2023-11-26 11:57:23,291 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 369 flow [2023-11-26 11:57:23,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:23,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:23,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:57:23,292 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:23,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1240616510, now seen corresponding path program 1 times [2023-11-26 11:57:23,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:23,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224871074] [2023-11-26 11:57:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:23,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:23,365 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 11:57:23,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:23,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224871074] [2023-11-26 11:57:23,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224871074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:23,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:23,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:23,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638839796] [2023-11-26 11:57:23,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:23,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:23,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:23,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2023-11-26 11:57:23,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:23,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2023-11-26 11:57:23,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:23,926 INFO L124 PetriNetUnfolderBase]: 2049/3867 cut-off events. [2023-11-26 11:57:23,927 INFO L125 PetriNetUnfolderBase]: For 1333/1416 co-relation queries the response was YES. [2023-11-26 11:57:23,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8725 conditions, 3867 events. 2049/3867 cut-off events. For 1333/1416 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 25289 event pairs, 950 based on Foata normal form. 15/3500 useless extension candidates. Maximal degree in co-relation 8706. Up to 2709 conditions per place. [2023-11-26 11:57:23,967 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 70 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-11-26 11:57:23,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 93 transitions, 540 flow [2023-11-26 11:57:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:57:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2023-11-26 11:57:23,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2023-11-26 11:57:23,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2023-11-26 11:57:23,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2023-11-26 11:57:23,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:23,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2023-11-26 11:57:23,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 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 11:57:23,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,971 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 369 flow. Second operand 3 states and 121 transitions. [2023-11-26 11:57:23,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 93 transitions, 540 flow [2023-11-26 11:57:23,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 93 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:23,976 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 389 flow [2023-11-26 11:57:23,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-11-26 11:57:23,978 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2023-11-26 11:57:23,978 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 389 flow [2023-11-26 11:57:23,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:23,978 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-26 11:57:23,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:57:23,979 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:23,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:23,980 INFO L85 PathProgramCache]: Analyzing trace with hash -120610546, now seen corresponding path program 2 times [2023-11-26 11:57:23,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:23,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331385699] [2023-11-26 11:57:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:23,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:24,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:24,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331385699] [2023-11-26 11:57:24,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331385699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:24,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755488079] [2023-11-26 11:57:24,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:57:24,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:24,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:24,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:24,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:57:24,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:57:24,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:24,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:57:24,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 11:57:24,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 11:57:24,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755488079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:24,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:24,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-26 11:57:24,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764400434] [2023-11-26 11:57:24,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:24,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:57:24,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:57:24,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:57:24,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2023-11-26 11:57:24,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 389 flow. Second operand has 14 states, 14 states have (on average 22.142857142857142) internal successors, (310), 14 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:24,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:24,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2023-11-26 11:57:24,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:25,480 INFO L124 PetriNetUnfolderBase]: 2052/3886 cut-off events. [2023-11-26 11:57:25,480 INFO L125 PetriNetUnfolderBase]: For 2154/2234 co-relation queries the response was YES. [2023-11-26 11:57:25,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9071 conditions, 3886 events. 2052/3886 cut-off events. For 2154/2234 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 25589 event pairs, 1630 based on Foata normal form. 4/3498 useless extension candidates. Maximal degree in co-relation 9050. Up to 2906 conditions per place. [2023-11-26 11:57:25,527 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 38 selfloop transitions, 35 changer transitions 0/91 dead transitions. [2023-11-26 11:57:25,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 91 transitions, 563 flow [2023-11-26 11:57:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:57:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 11:57:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 573 transitions. [2023-11-26 11:57:25,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3315972222222222 [2023-11-26 11:57:25,532 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 573 transitions. [2023-11-26 11:57:25,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 573 transitions. [2023-11-26 11:57:25,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:25,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 573 transitions. [2023-11-26 11:57:25,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 23.875) internal successors, (573), 24 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:25,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 72.0) internal successors, (1800), 25 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:25,541 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 72.0) internal successors, (1800), 25 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:25,541 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 389 flow. Second operand 24 states and 573 transitions. [2023-11-26 11:57:25,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 91 transitions, 563 flow [2023-11-26 11:57:25,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 91 transitions, 554 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:25,550 INFO L231 Difference]: Finished difference. Result has 108 places, 91 transitions, 491 flow [2023-11-26 11:57:25,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=491, PETRI_PLACES=108, PETRI_TRANSITIONS=91} [2023-11-26 11:57:25,551 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 38 predicate places. [2023-11-26 11:57:25,551 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 91 transitions, 491 flow [2023-11-26 11:57:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.142857142857142) internal successors, (310), 14 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:25,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:25,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:25,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:25,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:25,765 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:25,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash -821233191, now seen corresponding path program 1 times [2023-11-26 11:57:25,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:25,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777756523] [2023-11-26 11:57:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:25,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:25,933 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 11:57:25,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:25,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777756523] [2023-11-26 11:57:25,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777756523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:25,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:25,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:25,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267049773] [2023-11-26 11:57:25,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:25,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:25,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:25,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:25,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:25,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2023-11-26 11:57:25,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 91 transitions, 491 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:25,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:25,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2023-11-26 11:57:25,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:26,697 INFO L124 PetriNetUnfolderBase]: 2396/4559 cut-off events. [2023-11-26 11:57:26,697 INFO L125 PetriNetUnfolderBase]: For 1800/1880 co-relation queries the response was YES. [2023-11-26 11:57:26,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10377 conditions, 4559 events. 2396/4559 cut-off events. For 1800/1880 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 30327 event pairs, 1935 based on Foata normal form. 104/4271 useless extension candidates. Maximal degree in co-relation 10353. Up to 2932 conditions per place. [2023-11-26 11:57:26,742 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 79 selfloop transitions, 9 changer transitions 7/114 dead transitions. [2023-11-26 11:57:26,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 114 transitions, 762 flow [2023-11-26 11:57:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:57:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2023-11-26 11:57:26,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2023-11-26 11:57:26,745 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 158 transitions. [2023-11-26 11:57:26,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 158 transitions. [2023-11-26 11:57:26,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:26,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 158 transitions. [2023-11-26 11:57:26,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:26,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:26,747 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:26,747 INFO L175 Difference]: Start difference. First operand has 108 places, 91 transitions, 491 flow. Second operand 4 states and 158 transitions. [2023-11-26 11:57:26,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 114 transitions, 762 flow [2023-11-26 11:57:26,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 114 transitions, 668 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-26 11:57:26,755 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 420 flow [2023-11-26 11:57:26,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=420, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2023-11-26 11:57:26,756 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 31 predicate places. [2023-11-26 11:57:26,756 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 420 flow [2023-11-26 11:57:26,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:26,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:26,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:26,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:57:26,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:26,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1611530519, now seen corresponding path program 1 times [2023-11-26 11:57:26,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:26,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95375750] [2023-11-26 11:57:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:26,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:27,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:27,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95375750] [2023-11-26 11:57:27,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95375750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:27,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680035785] [2023-11-26 11:57:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:27,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:27,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:27,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:27,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:57:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:27,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:57:27,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:27,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:27,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680035785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:27,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:27,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-26 11:57:27,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045030765] [2023-11-26 11:57:27,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:27,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:57:27,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:27,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:57:27,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:57:27,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2023-11-26 11:57:27,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 420 flow. Second operand has 15 states, 15 states have (on average 22.866666666666667) internal successors, (343), 15 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:27,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:27,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2023-11-26 11:57:27,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:28,934 INFO L124 PetriNetUnfolderBase]: 3998/7602 cut-off events. [2023-11-26 11:57:28,934 INFO L125 PetriNetUnfolderBase]: For 3285/3429 co-relation queries the response was YES. [2023-11-26 11:57:28,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17455 conditions, 7602 events. 3998/7602 cut-off events. For 3285/3429 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 55466 event pairs, 2685 based on Foata normal form. 234/7163 useless extension candidates. Maximal degree in co-relation 17433. Up to 3378 conditions per place. [2023-11-26 11:57:29,031 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 109 selfloop transitions, 31 changer transitions 16/174 dead transitions. [2023-11-26 11:57:29,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 174 transitions, 1136 flow [2023-11-26 11:57:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:57:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:57:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 355 transitions. [2023-11-26 11:57:29,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41087962962962965 [2023-11-26 11:57:29,035 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 355 transitions. [2023-11-26 11:57:29,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 355 transitions. [2023-11-26 11:57:29,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:29,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 355 transitions. [2023-11-26 11:57:29,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:29,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 72.0) internal successors, (936), 13 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:29,042 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 72.0) internal successors, (936), 13 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:29,042 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 420 flow. Second operand 12 states and 355 transitions. [2023-11-26 11:57:29,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 174 transitions, 1136 flow [2023-11-26 11:57:29,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 174 transitions, 1116 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:57:29,052 INFO L231 Difference]: Finished difference. Result has 115 places, 107 transitions, 661 flow [2023-11-26 11:57:29,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=661, PETRI_PLACES=115, PETRI_TRANSITIONS=107} [2023-11-26 11:57:29,054 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 45 predicate places. [2023-11-26 11:57:29,054 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 107 transitions, 661 flow [2023-11-26 11:57:29,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.866666666666667) internal successors, (343), 15 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:29,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:29,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:29,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:29,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:57:29,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:29,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:29,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1962705052, now seen corresponding path program 1 times [2023-11-26 11:57:29,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:29,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577140192] [2023-11-26 11:57:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:29,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:29,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:29,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577140192] [2023-11-26 11:57:29,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577140192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:29,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027309980] [2023-11-26 11:57:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:29,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:29,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:29,486 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:29,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:57:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:29,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:57:29,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:29,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:29,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027309980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:29,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:57:29,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-26 11:57:29,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387321156] [2023-11-26 11:57:29,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:29,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:29,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:29,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 72 [2023-11-26 11:57:29,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 107 transitions, 661 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:29,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:29,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 72 [2023-11-26 11:57:29,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:30,457 INFO L124 PetriNetUnfolderBase]: 3033/6061 cut-off events. [2023-11-26 11:57:30,457 INFO L125 PetriNetUnfolderBase]: For 3701/3785 co-relation queries the response was YES. [2023-11-26 11:57:30,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13982 conditions, 6061 events. 3033/6061 cut-off events. For 3701/3785 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 44798 event pairs, 2523 based on Foata normal form. 280/5873 useless extension candidates. Maximal degree in co-relation 13954. Up to 4548 conditions per place. [2023-11-26 11:57:30,541 INFO L140 encePairwiseOnDemand]: 69/72 looper letters, 85 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-11-26 11:57:30,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 105 transitions, 825 flow [2023-11-26 11:57:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:57:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2023-11-26 11:57:30,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2023-11-26 11:57:30,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2023-11-26 11:57:30,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2023-11-26 11:57:30,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:30,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2023-11-26 11:57:30,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:30,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:30,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:30,546 INFO L175 Difference]: Start difference. First operand has 115 places, 107 transitions, 661 flow. Second operand 3 states and 110 transitions. [2023-11-26 11:57:30,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 105 transitions, 825 flow [2023-11-26 11:57:30,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 105 transitions, 809 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-26 11:57:30,559 INFO L231 Difference]: Finished difference. Result has 111 places, 105 transitions, 639 flow [2023-11-26 11:57:30,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=639, PETRI_PLACES=111, PETRI_TRANSITIONS=105} [2023-11-26 11:57:30,560 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 41 predicate places. [2023-11-26 11:57:30,561 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 105 transitions, 639 flow [2023-11-26 11:57:30,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:30,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:30,561 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1] [2023-11-26 11:57:30,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:30,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:57:30,769 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:30,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash -434509651, now seen corresponding path program 1 times [2023-11-26 11:57:30,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:30,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693852720] [2023-11-26 11:57:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:31,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:31,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693852720] [2023-11-26 11:57:31,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693852720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:31,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271399290] [2023-11-26 11:57:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:31,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:31,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:31,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:31,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:57:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:31,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:57:31,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:31,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:31,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271399290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:31,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:31,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2023-11-26 11:57:31,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483012539] [2023-11-26 11:57:31,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:31,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 11:57:31,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 11:57:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:57:31,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 72 [2023-11-26 11:57:31,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 105 transitions, 639 flow. Second operand has 28 states, 28 states have (on average 22.071428571428573) internal successors, (618), 28 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:31,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:31,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 72 [2023-11-26 11:57:31,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:33,292 INFO L124 PetriNetUnfolderBase]: 3061/6173 cut-off events. [2023-11-26 11:57:33,292 INFO L125 PetriNetUnfolderBase]: For 4064/4148 co-relation queries the response was YES. [2023-11-26 11:57:33,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14423 conditions, 6173 events. 3061/6173 cut-off events. For 4064/4148 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 45932 event pairs, 2523 based on Foata normal form. 21/5726 useless extension candidates. Maximal degree in co-relation 14394. Up to 4530 conditions per place. [2023-11-26 11:57:33,385 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 43 selfloop transitions, 100 changer transitions 0/161 dead transitions. [2023-11-26 11:57:33,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 161 transitions, 1471 flow [2023-11-26 11:57:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-26 11:57:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-26 11:57:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 659 transitions. [2023-11-26 11:57:33,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35202991452991456 [2023-11-26 11:57:33,392 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 659 transitions. [2023-11-26 11:57:33,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 659 transitions. [2023-11-26 11:57:33,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:33,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 659 transitions. [2023-11-26 11:57:33,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 25.346153846153847) internal successors, (659), 26 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:33,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 72.0) internal successors, (1944), 27 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:33,404 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 72.0) internal successors, (1944), 27 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:33,404 INFO L175 Difference]: Start difference. First operand has 111 places, 105 transitions, 639 flow. Second operand 26 states and 659 transitions. [2023-11-26 11:57:33,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 161 transitions, 1471 flow [2023-11-26 11:57:33,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 161 transitions, 1470 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:57:33,419 INFO L231 Difference]: Finished difference. Result has 142 places, 161 transitions, 1454 flow [2023-11-26 11:57:33,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1454, PETRI_PLACES=142, PETRI_TRANSITIONS=161} [2023-11-26 11:57:33,421 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 72 predicate places. [2023-11-26 11:57:33,421 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 161 transitions, 1454 flow [2023-11-26 11:57:33,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 22.071428571428573) internal successors, (618), 28 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:33,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:33,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:33,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:33,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:57:33,630 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:33,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1462426608, now seen corresponding path program 2 times [2023-11-26 11:57:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:33,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474824591] [2023-11-26 11:57:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:57:33,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:33,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474824591] [2023-11-26 11:57:33,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474824591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:33,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420299648] [2023-11-26 11:57:33,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:57:33,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:33,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:33,786 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:33,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:57:33,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:57:33,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:33,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:57:33,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:57:33,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:33,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420299648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:33,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:57:33,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-26 11:57:33,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549019804] [2023-11-26 11:57:33,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:33,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:57:33,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:33,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:57:33,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:57:33,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2023-11-26 11:57:33,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 161 transitions, 1454 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:33,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:33,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2023-11-26 11:57:33,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:35,339 INFO L124 PetriNetUnfolderBase]: 3765/6937 cut-off events. [2023-11-26 11:57:35,339 INFO L125 PetriNetUnfolderBase]: For 4051/4051 co-relation queries the response was YES. [2023-11-26 11:57:35,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16778 conditions, 6937 events. 3765/6937 cut-off events. For 4051/4051 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 48282 event pairs, 1369 based on Foata normal form. 88/6557 useless extension candidates. Maximal degree in co-relation 16741. Up to 2367 conditions per place. [2023-11-26 11:57:35,443 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 167 selfloop transitions, 7 changer transitions 0/190 dead transitions. [2023-11-26 11:57:35,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 190 transitions, 1884 flow [2023-11-26 11:57:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:57:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2023-11-26 11:57:35,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-26 11:57:35,446 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 152 transitions. [2023-11-26 11:57:35,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 152 transitions. [2023-11-26 11:57:35,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:35,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 152 transitions. [2023-11-26 11:57:35,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,448 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,448 INFO L175 Difference]: Start difference. First operand has 142 places, 161 transitions, 1454 flow. Second operand 4 states and 152 transitions. [2023-11-26 11:57:35,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 190 transitions, 1884 flow [2023-11-26 11:57:35,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 190 transitions, 1593 flow, removed 92 selfloop flow, removed 12 redundant places. [2023-11-26 11:57:35,477 INFO L231 Difference]: Finished difference. Result has 132 places, 160 transitions, 1173 flow [2023-11-26 11:57:35,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1173, PETRI_PLACES=132, PETRI_TRANSITIONS=160} [2023-11-26 11:57:35,478 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 62 predicate places. [2023-11-26 11:57:35,479 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 160 transitions, 1173 flow [2023-11-26 11:57:35,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:35,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:35,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-26 11:57:35,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:57:35,686 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:35,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash 757185197, now seen corresponding path program 1 times [2023-11-26 11:57:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:35,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2548317] [2023-11-26 11:57:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:35,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:36,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:36,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2548317] [2023-11-26 11:57:36,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2548317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:36,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117461489] [2023-11-26 11:57:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:36,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:36,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:36,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:36,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:57:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:36,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:57:36,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:36,515 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 11:57:36,878 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:57:36,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-26 11:57:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:36,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:37,286 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 11:57:37,293 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 11:57:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:37,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117461489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:37,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:37,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-11-26 11:57:37,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291548187] [2023-11-26 11:57:37,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:37,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:57:37,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:57:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:57:37,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 72 [2023-11-26 11:57:37,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 160 transitions, 1173 flow. Second operand has 21 states, 21 states have (on average 19.0) internal successors, (399), 21 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:37,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:37,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 72 [2023-11-26 11:57:37,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:43,529 INFO L124 PetriNetUnfolderBase]: 15755/27103 cut-off events. [2023-11-26 11:57:43,529 INFO L125 PetriNetUnfolderBase]: For 21772/22036 co-relation queries the response was YES. [2023-11-26 11:57:43,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67200 conditions, 27103 events. 15755/27103 cut-off events. For 21772/22036 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 222076 event pairs, 6664 based on Foata normal form. 0/24513 useless extension candidates. Maximal degree in co-relation 67165. Up to 4737 conditions per place. [2023-11-26 11:57:43,978 INFO L140 encePairwiseOnDemand]: 60/72 looper letters, 285 selfloop transitions, 110 changer transitions 9/417 dead transitions. [2023-11-26 11:57:43,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 417 transitions, 3069 flow [2023-11-26 11:57:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:57:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-26 11:57:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 564 transitions. [2023-11-26 11:57:43,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2023-11-26 11:57:43,982 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 564 transitions. [2023-11-26 11:57:43,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 564 transitions. [2023-11-26 11:57:43,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:43,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 564 transitions. [2023-11-26 11:57:43,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 31.333333333333332) internal successors, (564), 18 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:43,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 72.0) internal successors, (1368), 19 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:43,989 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 72.0) internal successors, (1368), 19 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:43,989 INFO L175 Difference]: Start difference. First operand has 132 places, 160 transitions, 1173 flow. Second operand 18 states and 564 transitions. [2023-11-26 11:57:43,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 417 transitions, 3069 flow [2023-11-26 11:57:44,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 417 transitions, 2925 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:57:44,035 INFO L231 Difference]: Finished difference. Result has 151 places, 175 transitions, 1463 flow [2023-11-26 11:57:44,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1463, PETRI_PLACES=151, PETRI_TRANSITIONS=175} [2023-11-26 11:57:44,036 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 81 predicate places. [2023-11-26 11:57:44,036 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 175 transitions, 1463 flow [2023-11-26 11:57:44,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.0) internal successors, (399), 21 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:44,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:44,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:44,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:44,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:57:44,251 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:44,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1909414521, now seen corresponding path program 1 times [2023-11-26 11:57:44,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:44,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87423155] [2023-11-26 11:57:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:44,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:57:44,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:44,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87423155] [2023-11-26 11:57:44,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87423155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:44,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995712821] [2023-11-26 11:57:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:44,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:44,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:44,363 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:44,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:57:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:44,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:57:44,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:57:44,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:57:44,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995712821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:44,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:44,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 11:57:44,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926961648] [2023-11-26 11:57:44,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:44,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:57:44,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:44,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:57:44,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:57:44,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 72 [2023-11-26 11:57:44,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 175 transitions, 1463 flow. Second operand has 12 states, 12 states have (on average 25.0) internal successors, (300), 12 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:44,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:44,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 72 [2023-11-26 11:57:44,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:50,353 INFO L124 PetriNetUnfolderBase]: 15589/28460 cut-off events. [2023-11-26 11:57:50,353 INFO L125 PetriNetUnfolderBase]: For 27913/28417 co-relation queries the response was YES. [2023-11-26 11:57:50,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75146 conditions, 28460 events. 15589/28460 cut-off events. For 27913/28417 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 242228 event pairs, 4196 based on Foata normal form. 0/27564 useless extension candidates. Maximal degree in co-relation 75106. Up to 11222 conditions per place. [2023-11-26 11:57:50,734 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 361 selfloop transitions, 13 changer transitions 0/395 dead transitions. [2023-11-26 11:57:50,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 395 transitions, 3313 flow [2023-11-26 11:57:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:57:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:57:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 395 transitions. [2023-11-26 11:57:50,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2023-11-26 11:57:50,742 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 395 transitions. [2023-11-26 11:57:50,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 395 transitions. [2023-11-26 11:57:50,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:50,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 395 transitions. [2023-11-26 11:57:50,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 39.5) internal successors, (395), 10 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:50,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:50,754 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:50,755 INFO L175 Difference]: Start difference. First operand has 151 places, 175 transitions, 1463 flow. Second operand 10 states and 395 transitions. [2023-11-26 11:57:50,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 395 transitions, 3313 flow [2023-11-26 11:57:51,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 395 transitions, 3224 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-11-26 11:57:51,084 INFO L231 Difference]: Finished difference. Result has 158 places, 184 transitions, 1502 flow [2023-11-26 11:57:51,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1502, PETRI_PLACES=158, PETRI_TRANSITIONS=184} [2023-11-26 11:57:51,085 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 88 predicate places. [2023-11-26 11:57:51,085 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 184 transitions, 1502 flow [2023-11-26 11:57:51,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.0) internal successors, (300), 12 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:51,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:51,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:51,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:51,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:57:51,292 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-26 11:57:51,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:51,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1997905528, now seen corresponding path program 1 times [2023-11-26 11:57:51,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:51,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250010716] [2023-11-26 11:57:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:51,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:52,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:52,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250010716] [2023-11-26 11:57:52,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250010716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:52,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005635643] [2023-11-26 11:57:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:52,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:52,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:52,023 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:52,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eba5324-f2e9-4c3c-bc3f-34cd93c15e2e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:57:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:52,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:57:52,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:52,197 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 11:57:52,503 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:57:52,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-26 11:57:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:52,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:52,901 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 18 treesize of output 16 [2023-11-26 11:57:52,906 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 16 [2023-11-26 11:57:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:57:52,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005635643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:52,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:52,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-11-26 11:57:52,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257968068] [2023-11-26 11:57:52,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:52,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:57:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:57:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:57:53,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 72 [2023-11-26 11:57:53,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 184 transitions, 1502 flow. Second operand has 21 states, 21 states have (on average 20.0) internal successors, (420), 21 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 11:57:53,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:53,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 72 [2023-11-26 11:57:53,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand