./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.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_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/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_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/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_bc61409d-d8af-4ee0-91ed-e67ad57899c0/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 e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:44:06,419 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:44:06,548 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 11:44:06,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:44:06,557 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:44:06,595 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:44:06,596 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:44:06,597 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:44:06,598 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:44:06,603 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:44:06,604 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:44:06,605 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:44:06,606 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:44:06,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:44:06,608 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:44:06,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:44:06,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:44:06,610 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:44:06,611 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:44:06,611 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:44:06,612 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:44:06,612 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:44:06,613 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:44:06,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:44:06,614 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 11:44:06,614 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:44:06,615 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:44:06,615 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:44:06,616 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:44:06,617 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:44:06,618 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:44:06,619 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:44:06,619 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:44:06,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:06,620 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:44:06,620 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:44:06,620 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:44:06,621 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:44:06,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:44:06,621 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:44:06,622 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:44:06,622 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:44:06,623 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:44:06,623 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:44:06,624 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_bc61409d-d8af-4ee0-91ed-e67ad57899c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2023-11-26 11:44:06,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:44:06,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:44:06,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:44:06,988 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:44:06,988 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:44:06,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-26 11:44:10,375 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:44:10,653 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:44:10,654 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-26 11:44:10,663 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/data/239f97160/402aaf79d654444cba1478a7079bd7f0/FLAGd360de934 [2023-11-26 11:44:10,679 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/data/239f97160/402aaf79d654444cba1478a7079bd7f0 [2023-11-26 11:44:10,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:44:10,683 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:44:10,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:10,685 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:44:10,691 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:44:10,692 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:10" (1/1) ... [2023-11-26 11:44:10,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e4c205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:10, skipping insertion in model container [2023-11-26 11:44:10,694 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:10" (1/1) ... [2023-11-26 11:44:10,725 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:44:10,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:10,960 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:44:11,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:11,024 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:44:11,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11 WrapperNode [2023-11-26 11:44:11,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:11,026 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:11,026 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:44:11,027 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:44:11,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,081 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 267 [2023-11-26 11:44:11,082 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:11,082 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:44:11,083 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:44:11,083 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:44:11,096 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,102 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,121 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 11:44:11,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,122 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,134 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,139 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,141 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,149 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:44:11,150 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:44:11,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:44:11,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:44:11,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (1/1) ... [2023-11-26 11:44:11,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:11,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:11,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:44:11,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:44:11,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:44:11,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:44:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:44:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:44:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:44:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:44:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:44:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:44:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:44:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:44:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:44:11,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:44:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:44:11,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:44:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:44:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:44:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:44:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:44:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:44:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:44:11,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:44:11,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:44:11,239 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 11:44:11,404 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:44:11,407 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:44:11,964 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:44:12,443 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:44:12,443 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:44:12,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:12 BoogieIcfgContainer [2023-11-26 11:44:12,445 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:44:12,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:44:12,447 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:44:12,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:44:12,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:44:10" (1/3) ... [2023-11-26 11:44:12,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3375a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:12, skipping insertion in model container [2023-11-26 11:44:12,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:11" (2/3) ... [2023-11-26 11:44:12,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3375a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:12, skipping insertion in model container [2023-11-26 11:44:12,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:12" (3/3) ... [2023-11-26 11:44:12,457 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2023-11-26 11:44:12,468 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:44:12,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:44:12,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-26 11:44:12,480 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:44:12,571 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:44:12,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 83 transitions, 180 flow [2023-11-26 11:44:12,657 INFO L124 PetriNetUnfolderBase]: 11/81 cut-off events. [2023-11-26 11:44:12,657 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:44:12,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 81 events. 11/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 254 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2023-11-26 11:44:12,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 83 transitions, 180 flow [2023-11-26 11:44:12,668 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 80 transitions, 172 flow [2023-11-26 11:44:12,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:44:12,686 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;@12aa9e2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:44:12,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-26 11:44:12,690 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:44:12,690 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-26 11:44:12,690 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:44:12,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:12,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:44:12,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:12,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash 766861, now seen corresponding path program 1 times [2023-11-26 11:44:12,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:12,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085095096] [2023-11-26 11:44:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:12,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:12,982 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 11:44:12,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085095096] [2023-11-26 11:44:12,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085095096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:12,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:12,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:12,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53387830] [2023-11-26 11:44:12,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:12,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:13,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:13,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:13,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:13,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 83 [2023-11-26 11:44:13,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:13,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:13,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 83 [2023-11-26 11:44:13,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:13,567 INFO L124 PetriNetUnfolderBase]: 520/1274 cut-off events. [2023-11-26 11:44:13,567 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-11-26 11:44:13,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2104 conditions, 1274 events. 520/1274 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8595 event pairs, 331 based on Foata normal form. 47/1025 useless extension candidates. Maximal degree in co-relation 1966. Up to 790 conditions per place. [2023-11-26 11:44:13,588 INFO L140 encePairwiseOnDemand]: 74/83 looper letters, 33 selfloop transitions, 4 changer transitions 3/75 dead transitions. [2023-11-26 11:44:13,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 238 flow [2023-11-26 11:44:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2023-11-26 11:44:13,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993975903614458 [2023-11-26 11:44:13,605 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 199 transitions. [2023-11-26 11:44:13,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 199 transitions. [2023-11-26 11:44:13,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:13,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 199 transitions. [2023-11-26 11:44:13,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:13,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:13,622 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:13,624 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 172 flow. Second operand 4 states and 199 transitions. [2023-11-26 11:44:13,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 238 flow [2023-11-26 11:44:13,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 230 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:44:13,639 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 155 flow [2023-11-26 11:44:13,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-11-26 11:44:13,646 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2023-11-26 11:44:13,646 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 155 flow [2023-11-26 11:44:13,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:13,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:13,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 11:44:13,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:44:13,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:13,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:13,651 INFO L85 PathProgramCache]: Analyzing trace with hash 23773464, now seen corresponding path program 1 times [2023-11-26 11:44:13,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:13,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548076251] [2023-11-26 11:44:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:13,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:13,847 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 11:44:13,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:13,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548076251] [2023-11-26 11:44:13,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548076251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:13,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:13,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:13,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71045063] [2023-11-26 11:44:13,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:13,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:13,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:13,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:13,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:13,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 83 [2023-11-26 11:44:13,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:13,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:13,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 83 [2023-11-26 11:44:13,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:14,158 INFO L124 PetriNetUnfolderBase]: 521/1275 cut-off events. [2023-11-26 11:44:14,159 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 11:44:14,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1275 events. 521/1275 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8585 event pairs, 331 based on Foata normal form. 1/980 useless extension candidates. Maximal degree in co-relation 2063. Up to 794 conditions per place. [2023-11-26 11:44:14,169 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 36 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-26 11:44:14,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 247 flow [2023-11-26 11:44:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2023-11-26 11:44:14,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933734939759037 [2023-11-26 11:44:14,173 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 197 transitions. [2023-11-26 11:44:14,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 197 transitions. [2023-11-26 11:44:14,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:14,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 197 transitions. [2023-11-26 11:44:14,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:14,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:14,177 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:14,177 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 155 flow. Second operand 4 states and 197 transitions. [2023-11-26 11:44:14,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 247 flow [2023-11-26 11:44:14,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 75 transitions, 233 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:14,180 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 174 flow [2023-11-26 11:44:14,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-11-26 11:44:14,181 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -5 predicate places. [2023-11-26 11:44:14,182 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 174 flow [2023-11-26 11:44:14,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:14,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:14,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-26 11:44:14,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:44:14,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:14,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:14,184 INFO L85 PathProgramCache]: Analyzing trace with hash -433533213, now seen corresponding path program 1 times [2023-11-26 11:44:14,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:14,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046613931] [2023-11-26 11:44:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:14,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:14,308 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 11:44:14,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:14,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046613931] [2023-11-26 11:44:14,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046613931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:14,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390424954] [2023-11-26 11:44:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:14,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:14,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:14,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:44:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:14,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:44:14,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:14,482 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 11:44:14,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:14,529 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 11:44:14,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390424954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:14,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:44:14,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-26 11:44:14,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065874899] [2023-11-26 11:44:14,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:14,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:44:14,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:14,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:44:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:44:14,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 83 [2023-11-26 11:44:14,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 174 flow. Second operand has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:14,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:14,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 83 [2023-11-26 11:44:14,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:14,875 INFO L124 PetriNetUnfolderBase]: 524/1287 cut-off events. [2023-11-26 11:44:14,876 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-26 11:44:14,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2127 conditions, 1287 events. 524/1287 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8672 event pairs, 331 based on Foata normal form. 0/988 useless extension candidates. Maximal degree in co-relation 2070. Up to 797 conditions per place. [2023-11-26 11:44:14,890 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 36 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2023-11-26 11:44:14,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 308 flow [2023-11-26 11:44:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:44:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:44:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 442 transitions. [2023-11-26 11:44:14,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5325301204819277 [2023-11-26 11:44:14,895 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 442 transitions. [2023-11-26 11:44:14,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 442 transitions. [2023-11-26 11:44:14,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:14,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 442 transitions. [2023-11-26 11:44:14,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 44.2) internal successors, (442), 10 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:14,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 83.0) internal successors, (913), 11 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:14,903 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 83.0) internal successors, (913), 11 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:14,903 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 174 flow. Second operand 10 states and 442 transitions. [2023-11-26 11:44:14,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 308 flow [2023-11-26 11:44:14,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:44:14,907 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 251 flow [2023-11-26 11:44:14,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=251, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-11-26 11:44:14,908 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-26 11:44:14,908 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 251 flow [2023-11-26 11:44:14,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:14,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:14,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:14,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:15,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:15,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:15,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash -315727857, now seen corresponding path program 1 times [2023-11-26 11:44:15,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:15,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552439599] [2023-11-26 11:44:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:15,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:15,216 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 11:44:15,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:15,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552439599] [2023-11-26 11:44:15,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552439599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:15,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:15,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100135952] [2023-11-26 11:44:15,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:15,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:15,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:15,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:15,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 83 [2023-11-26 11:44:15,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:15,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:15,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 83 [2023-11-26 11:44:15,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:15,685 INFO L124 PetriNetUnfolderBase]: 1120/2563 cut-off events. [2023-11-26 11:44:15,685 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-26 11:44:15,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4346 conditions, 2563 events. 1120/2563 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19278 event pairs, 427 based on Foata normal form. 26/2044 useless extension candidates. Maximal degree in co-relation 4310. Up to 936 conditions per place. [2023-11-26 11:44:15,707 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 93 selfloop transitions, 3 changer transitions 0/130 dead transitions. [2023-11-26 11:44:15,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 130 transitions, 538 flow [2023-11-26 11:44:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 242 transitions. [2023-11-26 11:44:15,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7289156626506024 [2023-11-26 11:44:15,710 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 242 transitions. [2023-11-26 11:44:15,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 242 transitions. [2023-11-26 11:44:15,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:15,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 242 transitions. [2023-11-26 11:44:15,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:15,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:15,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:15,713 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 251 flow. Second operand 4 states and 242 transitions. [2023-11-26 11:44:15,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 130 transitions, 538 flow [2023-11-26 11:44:15,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 130 transitions, 508 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:15,718 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 243 flow [2023-11-26 11:44:15,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=79, 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=4, PETRI_FLOW=243, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-11-26 11:44:15,720 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-26 11:44:15,720 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 243 flow [2023-11-26 11:44:15,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:15,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:15,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:15,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:44:15,721 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:15,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:15,722 INFO L85 PathProgramCache]: Analyzing trace with hash -530388614, now seen corresponding path program 1 times [2023-11-26 11:44:15,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:15,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76525199] [2023-11-26 11:44:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:15,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:15,824 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 11:44:15,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:15,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76525199] [2023-11-26 11:44:15,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76525199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:15,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:15,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:44:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121517587] [2023-11-26 11:44:15,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:15,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 83 [2023-11-26 11:44:15,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:15,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:15,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 83 [2023-11-26 11:44:15,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:16,592 INFO L124 PetriNetUnfolderBase]: 2089/4804 cut-off events. [2023-11-26 11:44:16,592 INFO L125 PetriNetUnfolderBase]: For 439/522 co-relation queries the response was YES. [2023-11-26 11:44:16,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8333 conditions, 4804 events. 2089/4804 cut-off events. For 439/522 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 40475 event pairs, 827 based on Foata normal form. 50/3921 useless extension candidates. Maximal degree in co-relation 8299. Up to 1768 conditions per place. [2023-11-26 11:44:16,638 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 97 selfloop transitions, 3 changer transitions 0/134 dead transitions. [2023-11-26 11:44:16,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 134 transitions, 569 flow [2023-11-26 11:44:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2023-11-26 11:44:16,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228915662650602 [2023-11-26 11:44:16,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 240 transitions. [2023-11-26 11:44:16,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 240 transitions. [2023-11-26 11:44:16,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:16,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 240 transitions. [2023-11-26 11:44:16,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:16,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:16,643 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:16,643 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 243 flow. Second operand 4 states and 240 transitions. [2023-11-26 11:44:16,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 134 transitions, 569 flow [2023-11-26 11:44:16,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 134 transitions, 563 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:44:16,651 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 263 flow [2023-11-26 11:44:16,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2023-11-26 11:44:16,652 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2023-11-26 11:44:16,652 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 263 flow [2023-11-26 11:44:16,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:16,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:16,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:16,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:44:16,653 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:16,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash 129631603, now seen corresponding path program 1 times [2023-11-26 11:44:16,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:16,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802927414] [2023-11-26 11:44:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:16,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:16,761 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 11:44:16,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:16,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802927414] [2023-11-26 11:44:16,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802927414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:16,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:16,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:44:16,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142443217] [2023-11-26 11:44:16,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:16,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:16,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:16,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 83 [2023-11-26 11:44:16,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:16,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:16,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 83 [2023-11-26 11:44:16,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:17,461 INFO L124 PetriNetUnfolderBase]: 1670/3737 cut-off events. [2023-11-26 11:44:17,462 INFO L125 PetriNetUnfolderBase]: For 662/760 co-relation queries the response was YES. [2023-11-26 11:44:17,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6998 conditions, 3737 events. 1670/3737 cut-off events. For 662/760 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 29278 event pairs, 643 based on Foata normal form. 0/3193 useless extension candidates. Maximal degree in co-relation 6962. Up to 1440 conditions per place. [2023-11-26 11:44:17,502 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 105 selfloop transitions, 4 changer transitions 6/151 dead transitions. [2023-11-26 11:44:17,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 666 flow [2023-11-26 11:44:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:44:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 301 transitions. [2023-11-26 11:44:17,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7253012048192771 [2023-11-26 11:44:17,505 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 301 transitions. [2023-11-26 11:44:17,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 301 transitions. [2023-11-26 11:44:17,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:17,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 301 transitions. [2023-11-26 11:44:17,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:17,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:17,509 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:17,510 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 263 flow. Second operand 5 states and 301 transitions. [2023-11-26 11:44:17,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 666 flow [2023-11-26 11:44:17,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 151 transitions, 658 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:44:17,516 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 286 flow [2023-11-26 11:44:17,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2023-11-26 11:44:17,520 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 18 predicate places. [2023-11-26 11:44:17,521 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 286 flow [2023-11-26 11:44:17,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:17,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:17,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:17,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:44:17,522 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:17,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash -245863896, now seen corresponding path program 1 times [2023-11-26 11:44:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:17,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075079483] [2023-11-26 11:44:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:17,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:44:17,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:17,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075079483] [2023-11-26 11:44:17,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075079483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:17,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:17,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:17,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814498838] [2023-11-26 11:44:17,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:17,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:17,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:17,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:17,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 83 [2023-11-26 11:44:17,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:17,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:17,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 83 [2023-11-26 11:44:17,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:18,201 INFO L124 PetriNetUnfolderBase]: 1637/3816 cut-off events. [2023-11-26 11:44:18,201 INFO L125 PetriNetUnfolderBase]: For 1181/1299 co-relation queries the response was YES. [2023-11-26 11:44:18,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7431 conditions, 3816 events. 1637/3816 cut-off events. For 1181/1299 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 30798 event pairs, 1203 based on Foata normal form. 1/3248 useless extension candidates. Maximal degree in co-relation 7397. Up to 2569 conditions per place. [2023-11-26 11:44:18,243 INFO L140 encePairwiseOnDemand]: 80/83 looper letters, 51 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-11-26 11:44:18,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 89 transitions, 388 flow [2023-11-26 11:44:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:44:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-26 11:44:18,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506024096385542 [2023-11-26 11:44:18,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-26 11:44:18,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-26 11:44:18,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:18,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-26 11:44:18,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:18,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:18,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:18,248 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 286 flow. Second operand 3 states and 162 transitions. [2023-11-26 11:44:18,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 89 transitions, 388 flow [2023-11-26 11:44:18,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 89 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:44:18,253 INFO L231 Difference]: Finished difference. Result has 96 places, 89 transitions, 286 flow [2023-11-26 11:44:18,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=96, PETRI_TRANSITIONS=89} [2023-11-26 11:44:18,254 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 20 predicate places. [2023-11-26 11:44:18,255 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 89 transitions, 286 flow [2023-11-26 11:44:18,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:18,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:18,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:18,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:44:18,256 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:18,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1448062467, now seen corresponding path program 1 times [2023-11-26 11:44:18,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:18,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655573139] [2023-11-26 11:44:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:44:18,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:18,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655573139] [2023-11-26 11:44:18,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655573139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:18,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786011811] [2023-11-26 11:44:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:18,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:18,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:18,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:18,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:44:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:18,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:44:18,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:44:18,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:44:18,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786011811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:18,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:44:18,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-26 11:44:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44069436] [2023-11-26 11:44:18,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:44:18,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:44:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:44:18,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 83 [2023-11-26 11:44:18,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 89 transitions, 286 flow. Second operand has 10 states, 10 states have (on average 40.6) internal successors, (406), 10 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:18,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:18,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 83 [2023-11-26 11:44:18,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:19,231 INFO L124 PetriNetUnfolderBase]: 1635/3814 cut-off events. [2023-11-26 11:44:19,232 INFO L125 PetriNetUnfolderBase]: For 1187/1305 co-relation queries the response was YES. [2023-11-26 11:44:19,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7429 conditions, 3814 events. 1635/3814 cut-off events. For 1187/1305 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 30730 event pairs, 1203 based on Foata normal form. 2/3247 useless extension candidates. Maximal degree in co-relation 7401. Up to 2561 conditions per place. [2023-11-26 11:44:19,266 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 42 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2023-11-26 11:44:19,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 87 transitions, 382 flow [2023-11-26 11:44:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:44:19,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:44:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 317 transitions. [2023-11-26 11:44:19,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456110154905336 [2023-11-26 11:44:19,268 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 317 transitions. [2023-11-26 11:44:19,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 317 transitions. [2023-11-26 11:44:19,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:19,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 317 transitions. [2023-11-26 11:44:19,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:19,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 83.0) internal successors, (664), 8 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:19,272 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 83.0) internal successors, (664), 8 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:19,272 INFO L175 Difference]: Start difference. First operand has 96 places, 89 transitions, 286 flow. Second operand 7 states and 317 transitions. [2023-11-26 11:44:19,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 87 transitions, 382 flow [2023-11-26 11:44:19,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 87 transitions, 378 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:44:19,277 INFO L231 Difference]: Finished difference. Result has 100 places, 87 transitions, 294 flow [2023-11-26 11:44:19,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=100, PETRI_TRANSITIONS=87} [2023-11-26 11:44:19,278 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 24 predicate places. [2023-11-26 11:44:19,278 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 87 transitions, 294 flow [2023-11-26 11:44:19,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.6) internal successors, (406), 10 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:19,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:19,279 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-26 11:44:19,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:19,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:19,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:19,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:19,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1790867800, now seen corresponding path program 2 times [2023-11-26 11:44:19,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:19,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075738445] [2023-11-26 11:44:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:19,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:44:19,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:19,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075738445] [2023-11-26 11:44:19,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075738445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:19,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405520916] [2023-11-26 11:44:19,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:44:19,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:19,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:19,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:19,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:44:19,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:44:19,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:44:19,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:44:19,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:19,845 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 11:44:19,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:44:19,910 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 11:44:19,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405520916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:44:19,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:44:19,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 2, 2] total 12 [2023-11-26 11:44:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224828695] [2023-11-26 11:44:19,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:44:19,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:44:19,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:44:19,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:44:19,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 83 [2023-11-26 11:44:19,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 87 transitions, 294 flow. Second operand has 13 states, 13 states have (on average 40.61538461538461) internal successors, (528), 13 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:19,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:19,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 83 [2023-11-26 11:44:19,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:20,625 INFO L124 PetriNetUnfolderBase]: 1633/3806 cut-off events. [2023-11-26 11:44:20,625 INFO L125 PetriNetUnfolderBase]: For 1177/1295 co-relation queries the response was YES. [2023-11-26 11:44:20,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7408 conditions, 3806 events. 1633/3806 cut-off events. For 1177/1295 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 30689 event pairs, 1203 based on Foata normal form. 1/3239 useless extension candidates. Maximal degree in co-relation 7393. Up to 2557 conditions per place. [2023-11-26 11:44:20,659 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 38 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2023-11-26 11:44:20,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 81 transitions, 344 flow [2023-11-26 11:44:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:44:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:44:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 392 transitions. [2023-11-26 11:44:20,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247657295850067 [2023-11-26 11:44:20,663 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 392 transitions. [2023-11-26 11:44:20,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 392 transitions. [2023-11-26 11:44:20,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:20,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 392 transitions. [2023-11-26 11:44:20,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 43.55555555555556) internal successors, (392), 9 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:20,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:20,667 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:20,667 INFO L175 Difference]: Start difference. First operand has 100 places, 87 transitions, 294 flow. Second operand 9 states and 392 transitions. [2023-11-26 11:44:20,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 81 transitions, 344 flow [2023-11-26 11:44:20,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 81 transitions, 316 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-26 11:44:20,672 INFO L231 Difference]: Finished difference. Result has 95 places, 81 transitions, 240 flow [2023-11-26 11:44:20,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=240, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2023-11-26 11:44:20,673 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 19 predicate places. [2023-11-26 11:44:20,673 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 240 flow [2023-11-26 11:44:20,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 40.61538461538461) internal successors, (528), 13 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:20,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:20,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:20,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:20,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:20,880 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:20,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:20,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2055613923, now seen corresponding path program 2 times [2023-11-26 11:44:20,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:20,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235188017] [2023-11-26 11:44:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:20,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:21,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235188017] [2023-11-26 11:44:21,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235188017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289746063] [2023-11-26 11:44:21,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:44:21,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:21,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:21,018 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:21,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:44:21,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:44:21,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:44:21,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:44:21,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:21,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:21,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289746063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:21,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:21,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-26 11:44:21,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115434959] [2023-11-26 11:44:21,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:21,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:44:21,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:21,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:44:21,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:44:21,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 83 [2023-11-26 11:44:21,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:21,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:21,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 83 [2023-11-26 11:44:21,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:21,809 INFO L124 PetriNetUnfolderBase]: 1906/4103 cut-off events. [2023-11-26 11:44:21,809 INFO L125 PetriNetUnfolderBase]: For 1093/1155 co-relation queries the response was YES. [2023-11-26 11:44:21,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8235 conditions, 4103 events. 1906/4103 cut-off events. For 1093/1155 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 31759 event pairs, 1113 based on Foata normal form. 48/3565 useless extension candidates. Maximal degree in co-relation 8224. Up to 2357 conditions per place. [2023-11-26 11:44:21,842 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 61 selfloop transitions, 5 changer transitions 0/98 dead transitions. [2023-11-26 11:44:21,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 98 transitions, 417 flow [2023-11-26 11:44:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 207 transitions. [2023-11-26 11:44:21,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6234939759036144 [2023-11-26 11:44:21,844 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 207 transitions. [2023-11-26 11:44:21,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 207 transitions. [2023-11-26 11:44:21,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:21,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 207 transitions. [2023-11-26 11:44:21,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:21,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:21,847 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:21,847 INFO L175 Difference]: Start difference. First operand has 95 places, 81 transitions, 240 flow. Second operand 4 states and 207 transitions. [2023-11-26 11:44:21,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 98 transitions, 417 flow [2023-11-26 11:44:21,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 98 transitions, 401 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-26 11:44:21,855 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 230 flow [2023-11-26 11:44:21,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2023-11-26 11:44:21,856 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 13 predicate places. [2023-11-26 11:44:21,856 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 230 flow [2023-11-26 11:44:21,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:21,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:21,856 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:21,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:22,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:44:22,062 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:22,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:22,063 INFO L85 PathProgramCache]: Analyzing trace with hash 109678354, now seen corresponding path program 1 times [2023-11-26 11:44:22,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:22,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782574341] [2023-11-26 11:44:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:22,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:22,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:22,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782574341] [2023-11-26 11:44:22,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782574341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:22,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:22,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:22,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329671142] [2023-11-26 11:44:22,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:22,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:22,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:22,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:22,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:22,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 83 [2023-11-26 11:44:22,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:22,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:22,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 83 [2023-11-26 11:44:22,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:22,686 INFO L124 PetriNetUnfolderBase]: 1865/4148 cut-off events. [2023-11-26 11:44:22,686 INFO L125 PetriNetUnfolderBase]: For 2009/2098 co-relation queries the response was YES. [2023-11-26 11:44:22,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8403 conditions, 4148 events. 1865/4148 cut-off events. For 2009/2098 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 32101 event pairs, 779 based on Foata normal form. 184/3662 useless extension candidates. Maximal degree in co-relation 8392. Up to 1555 conditions per place. [2023-11-26 11:44:22,722 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 65 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-11-26 11:44:22,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 98 transitions, 444 flow [2023-11-26 11:44:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2023-11-26 11:44:22,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6144578313253012 [2023-11-26 11:44:22,724 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 204 transitions. [2023-11-26 11:44:22,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 204 transitions. [2023-11-26 11:44:22,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:22,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 204 transitions. [2023-11-26 11:44:22,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:22,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:22,727 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:22,727 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 230 flow. Second operand 4 states and 204 transitions. [2023-11-26 11:44:22,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 98 transitions, 444 flow [2023-11-26 11:44:22,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 426 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:22,732 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 222 flow [2023-11-26 11:44:22,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2023-11-26 11:44:22,733 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 11 predicate places. [2023-11-26 11:44:22,733 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 222 flow [2023-11-26 11:44:22,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:22,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:22,733 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:22,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:44:22,734 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:22,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash 700478659, now seen corresponding path program 1 times [2023-11-26 11:44:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:22,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293601320] [2023-11-26 11:44:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:22,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:22,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:22,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293601320] [2023-11-26 11:44:22,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293601320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:22,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:22,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:22,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339454758] [2023-11-26 11:44:22,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:22,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:22,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:22,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:22,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 83 [2023-11-26 11:44:22,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:22,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:22,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 83 [2023-11-26 11:44:22,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:23,289 INFO L124 PetriNetUnfolderBase]: 1657/3726 cut-off events. [2023-11-26 11:44:23,289 INFO L125 PetriNetUnfolderBase]: For 1369/1419 co-relation queries the response was YES. [2023-11-26 11:44:23,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7539 conditions, 3726 events. 1657/3726 cut-off events. For 1369/1419 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 28873 event pairs, 1089 based on Foata normal form. 0/3348 useless extension candidates. Maximal degree in co-relation 7528. Up to 2358 conditions per place. [2023-11-26 11:44:23,322 INFO L140 encePairwiseOnDemand]: 80/83 looper letters, 60 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2023-11-26 11:44:23,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 95 transitions, 399 flow [2023-11-26 11:44:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:44:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-11-26 11:44:23,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6827309236947792 [2023-11-26 11:44:23,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-11-26 11:44:23,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-11-26 11:44:23,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:23,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-11-26 11:44:23,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:23,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:23,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:23,327 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 222 flow. Second operand 3 states and 170 transitions. [2023-11-26 11:44:23,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 95 transitions, 399 flow [2023-11-26 11:44:23,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 95 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:23,337 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 220 flow [2023-11-26 11:44:23,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2023-11-26 11:44:23,338 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 9 predicate places. [2023-11-26 11:44:23,339 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 220 flow [2023-11-26 11:44:23,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:23,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:23,339 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:23,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:44:23,340 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:23,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash -864414584, now seen corresponding path program 1 times [2023-11-26 11:44:23,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:23,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455420090] [2023-11-26 11:44:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:23,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:23,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:23,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455420090] [2023-11-26 11:44:23,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455420090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:23,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355801742] [2023-11-26 11:44:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:23,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:23,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:23,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:23,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:44:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:23,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:44:23,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:23,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:23,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355801742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:23,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:23,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-26 11:44:23,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915770683] [2023-11-26 11:44:23,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:23,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:44:23,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:23,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:44:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:44:23,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 83 [2023-11-26 11:44:23,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:23,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:23,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 83 [2023-11-26 11:44:23,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:24,173 INFO L124 PetriNetUnfolderBase]: 1855/3982 cut-off events. [2023-11-26 11:44:24,173 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2023-11-26 11:44:24,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8242 conditions, 3982 events. 1855/3982 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 30366 event pairs, 1099 based on Foata normal form. 46/3518 useless extension candidates. Maximal degree in co-relation 8231. Up to 2359 conditions per place. [2023-11-26 11:44:24,201 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 63 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2023-11-26 11:44:24,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 96 transitions, 434 flow [2023-11-26 11:44:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 207 transitions. [2023-11-26 11:44:24,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6234939759036144 [2023-11-26 11:44:24,204 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 207 transitions. [2023-11-26 11:44:24,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 207 transitions. [2023-11-26 11:44:24,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:24,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 207 transitions. [2023-11-26 11:44:24,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:24,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:24,206 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:24,206 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 220 flow. Second operand 4 states and 207 transitions. [2023-11-26 11:44:24,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 96 transitions, 434 flow [2023-11-26 11:44:24,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 96 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:44:24,216 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 218 flow [2023-11-26 11:44:24,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2023-11-26 11:44:24,217 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 9 predicate places. [2023-11-26 11:44:24,217 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 218 flow [2023-11-26 11:44:24,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:24,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:24,218 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:24,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:24,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:44:24,424 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:24,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash -894937449, now seen corresponding path program 1 times [2023-11-26 11:44:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:24,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943516575] [2023-11-26 11:44:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:24,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:24,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943516575] [2023-11-26 11:44:24,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943516575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:24,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:24,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:24,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655409709] [2023-11-26 11:44:24,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:24,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:24,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 83 [2023-11-26 11:44:24,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:24,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:24,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 83 [2023-11-26 11:44:24,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:25,008 INFO L124 PetriNetUnfolderBase]: 1585/3752 cut-off events. [2023-11-26 11:44:25,008 INFO L125 PetriNetUnfolderBase]: For 1569/1591 co-relation queries the response was YES. [2023-11-26 11:44:25,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7367 conditions, 3752 events. 1585/3752 cut-off events. For 1569/1591 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 29646 event pairs, 763 based on Foata normal form. 0/3266 useless extension candidates. Maximal degree in co-relation 7356. Up to 1555 conditions per place. [2023-11-26 11:44:25,037 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 63 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2023-11-26 11:44:25,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 95 transitions, 422 flow [2023-11-26 11:44:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 205 transitions. [2023-11-26 11:44:25,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6174698795180723 [2023-11-26 11:44:25,040 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 205 transitions. [2023-11-26 11:44:25,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 205 transitions. [2023-11-26 11:44:25,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:25,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 205 transitions. [2023-11-26 11:44:25,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:25,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:25,043 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:25,043 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 218 flow. Second operand 4 states and 205 transitions. [2023-11-26 11:44:25,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 95 transitions, 422 flow [2023-11-26 11:44:25,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 412 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:25,049 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 212 flow [2023-11-26 11:44:25,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2023-11-26 11:44:25,050 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-26 11:44:25,050 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 212 flow [2023-11-26 11:44:25,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:25,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:25,051 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:25,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:44:25,051 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:25,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:25,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1027047465, now seen corresponding path program 1 times [2023-11-26 11:44:25,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:25,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491653702] [2023-11-26 11:44:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:25,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:25,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:25,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491653702] [2023-11-26 11:44:25,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491653702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:25,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:25,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:25,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239405246] [2023-11-26 11:44:25,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:25,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:25,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:25,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:25,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:25,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 83 [2023-11-26 11:44:25,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:25,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:25,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 83 [2023-11-26 11:44:25,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:25,614 INFO L124 PetriNetUnfolderBase]: 1645/3678 cut-off events. [2023-11-26 11:44:25,614 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2023-11-26 11:44:25,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7427 conditions, 3678 events. 1645/3678 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28302 event pairs, 1087 based on Foata normal form. 0/3298 useless extension candidates. Maximal degree in co-relation 7416. Up to 2360 conditions per place. [2023-11-26 11:44:25,644 INFO L140 encePairwiseOnDemand]: 80/83 looper letters, 62 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-11-26 11:44:25,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 94 transitions, 414 flow [2023-11-26 11:44:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:44:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-11-26 11:44:25,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6827309236947792 [2023-11-26 11:44:25,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-11-26 11:44:25,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-11-26 11:44:25,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:25,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-11-26 11:44:25,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:25,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:25,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:25,649 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 212 flow. Second operand 3 states and 170 transitions. [2023-11-26 11:44:25,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 94 transitions, 414 flow [2023-11-26 11:44:25,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 94 transitions, 408 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:25,656 INFO L231 Difference]: Finished difference. Result has 82 places, 74 transitions, 210 flow [2023-11-26 11:44:25,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=82, PETRI_TRANSITIONS=74} [2023-11-26 11:44:25,658 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-26 11:44:25,658 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 74 transitions, 210 flow [2023-11-26 11:44:25,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:25,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:25,658 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:25,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:44:25,659 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:25,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:25,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1150832475, now seen corresponding path program 1 times [2023-11-26 11:44:25,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:25,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554453664] [2023-11-26 11:44:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:25,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:25,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554453664] [2023-11-26 11:44:25,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554453664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945605653] [2023-11-26 11:44:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:25,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:25,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:25,804 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:25,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:44:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:25,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:25,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:25,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:25,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945605653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:25,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:25,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-26 11:44:25,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220277710] [2023-11-26 11:44:25,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:25,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:25,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:25,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:26,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 83 [2023-11-26 11:44:26,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:26,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:26,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 83 [2023-11-26 11:44:26,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:26,737 INFO L124 PetriNetUnfolderBase]: 2262/4667 cut-off events. [2023-11-26 11:44:26,737 INFO L125 PetriNetUnfolderBase]: For 1773/1773 co-relation queries the response was YES. [2023-11-26 11:44:26,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9499 conditions, 4667 events. 2262/4667 cut-off events. For 1773/1773 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 35527 event pairs, 1203 based on Foata normal form. 96/4203 useless extension candidates. Maximal degree in co-relation 9488. Up to 2564 conditions per place. [2023-11-26 11:44:26,781 INFO L140 encePairwiseOnDemand]: 74/83 looper letters, 102 selfloop transitions, 6 changer transitions 0/131 dead transitions. [2023-11-26 11:44:26,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 131 transitions, 603 flow [2023-11-26 11:44:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:44:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 275 transitions. [2023-11-26 11:44:26,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626506024096386 [2023-11-26 11:44:26,783 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 275 transitions. [2023-11-26 11:44:26,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 275 transitions. [2023-11-26 11:44:26,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:26,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 275 transitions. [2023-11-26 11:44:26,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.0) internal successors, (275), 5 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:26,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:26,787 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:26,787 INFO L175 Difference]: Start difference. First operand has 82 places, 74 transitions, 210 flow. Second operand 5 states and 275 transitions. [2023-11-26 11:44:26,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 131 transitions, 603 flow [2023-11-26 11:44:26,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 131 transitions, 571 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:44:26,793 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 238 flow [2023-11-26 11:44:26,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2023-11-26 11:44:26,794 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 10 predicate places. [2023-11-26 11:44:26,794 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 238 flow [2023-11-26 11:44:26,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:26,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:26,795 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:26,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:27,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:44:27,000 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:27,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1042386278, now seen corresponding path program 1 times [2023-11-26 11:44:27,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:27,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358339190] [2023-11-26 11:44:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:27,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:27,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:27,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358339190] [2023-11-26 11:44:27,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358339190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:27,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:27,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:44:27,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154418699] [2023-11-26 11:44:27,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:27,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:27,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:27,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 83 [2023-11-26 11:44:27,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:27,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:27,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 83 [2023-11-26 11:44:27,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:27,627 INFO L124 PetriNetUnfolderBase]: 1523/3318 cut-off events. [2023-11-26 11:44:27,627 INFO L125 PetriNetUnfolderBase]: For 1893/1937 co-relation queries the response was YES. [2023-11-26 11:44:27,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7217 conditions, 3318 events. 1523/3318 cut-off events. For 1893/1937 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 23761 event pairs, 691 based on Foata normal form. 24/3064 useless extension candidates. Maximal degree in co-relation 7204. Up to 1458 conditions per place. [2023-11-26 11:44:27,652 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 99 selfloop transitions, 4 changer transitions 16/147 dead transitions. [2023-11-26 11:44:27,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 147 transitions, 783 flow [2023-11-26 11:44:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:44:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 297 transitions. [2023-11-26 11:44:27,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7156626506024096 [2023-11-26 11:44:27,654 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 297 transitions. [2023-11-26 11:44:27,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 297 transitions. [2023-11-26 11:44:27,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:27,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 297 transitions. [2023-11-26 11:44:27,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:27,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:27,658 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:27,658 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 238 flow. Second operand 5 states and 297 transitions. [2023-11-26 11:44:27,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 147 transitions, 783 flow [2023-11-26 11:44:27,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 147 transitions, 778 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:44:27,666 INFO L231 Difference]: Finished difference. Result has 92 places, 78 transitions, 261 flow [2023-11-26 11:44:27,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=92, PETRI_TRANSITIONS=78} [2023-11-26 11:44:27,667 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 16 predicate places. [2023-11-26 11:44:27,667 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 78 transitions, 261 flow [2023-11-26 11:44:27,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:27,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:27,668 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:27,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 11:44:27,668 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:27,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1316067515, now seen corresponding path program 1 times [2023-11-26 11:44:27,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:27,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481375549] [2023-11-26 11:44:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:27,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:27,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:27,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481375549] [2023-11-26 11:44:27,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481375549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:27,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513850906] [2023-11-26 11:44:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:27,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:27,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:27,798 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:27,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:44:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:27,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:44:27,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:27,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:27,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513850906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:27,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:27,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-26 11:44:27,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072256935] [2023-11-26 11:44:27,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:27,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:27,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:27,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:27,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:28,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 83 [2023-11-26 11:44:28,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 78 transitions, 261 flow. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:28,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:28,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 83 [2023-11-26 11:44:28,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:28,461 INFO L124 PetriNetUnfolderBase]: 1611/3602 cut-off events. [2023-11-26 11:44:28,461 INFO L125 PetriNetUnfolderBase]: For 2554/2558 co-relation queries the response was YES. [2023-11-26 11:44:28,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8303 conditions, 3602 events. 1611/3602 cut-off events. For 2554/2558 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 26644 event pairs, 899 based on Foata normal form. 46/3338 useless extension candidates. Maximal degree in co-relation 8287. Up to 1753 conditions per place. [2023-11-26 11:44:28,489 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 67 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2023-11-26 11:44:28,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 475 flow [2023-11-26 11:44:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 206 transitions. [2023-11-26 11:44:28,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204819277108434 [2023-11-26 11:44:28,491 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 206 transitions. [2023-11-26 11:44:28,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 206 transitions. [2023-11-26 11:44:28,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:28,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 206 transitions. [2023-11-26 11:44:28,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:28,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:28,494 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:28,494 INFO L175 Difference]: Start difference. First operand has 92 places, 78 transitions, 261 flow. Second operand 4 states and 206 transitions. [2023-11-26 11:44:28,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 475 flow [2023-11-26 11:44:28,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 475 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:44:28,506 INFO L231 Difference]: Finished difference. Result has 94 places, 77 transitions, 267 flow [2023-11-26 11:44:28,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=94, PETRI_TRANSITIONS=77} [2023-11-26 11:44:28,507 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 18 predicate places. [2023-11-26 11:44:28,507 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 77 transitions, 267 flow [2023-11-26 11:44:28,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:28,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:28,508 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:28,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:28,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:44:28,724 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:28,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:28,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2143418231, now seen corresponding path program 1 times [2023-11-26 11:44:28,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:28,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931785217] [2023-11-26 11:44:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:28,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:28,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:28,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931785217] [2023-11-26 11:44:28,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931785217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:28,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958895187] [2023-11-26 11:44:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:28,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:28,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:28,832 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:28,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:44:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:28,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:44:28,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:29,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958895187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:29,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:29,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-26 11:44:29,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333889767] [2023-11-26 11:44:29,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:29,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:29,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 83 [2023-11-26 11:44:29,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 77 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:29,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:29,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 83 [2023-11-26 11:44:29,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:29,490 INFO L124 PetriNetUnfolderBase]: 1615/3568 cut-off events. [2023-11-26 11:44:29,491 INFO L125 PetriNetUnfolderBase]: For 3024/3028 co-relation queries the response was YES. [2023-11-26 11:44:29,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8405 conditions, 3568 events. 1615/3568 cut-off events. For 3024/3028 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 26152 event pairs, 899 based on Foata normal form. 46/3304 useless extension candidates. Maximal degree in co-relation 8388. Up to 1753 conditions per place. [2023-11-26 11:44:29,520 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 68 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-11-26 11:44:29,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 96 transitions, 481 flow [2023-11-26 11:44:29,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 202 transitions. [2023-11-26 11:44:29,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608433734939759 [2023-11-26 11:44:29,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 202 transitions. [2023-11-26 11:44:29,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 202 transitions. [2023-11-26 11:44:29,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:29,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 202 transitions. [2023-11-26 11:44:29,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:29,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:29,526 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:29,526 INFO L175 Difference]: Start difference. First operand has 94 places, 77 transitions, 267 flow. Second operand 4 states and 202 transitions. [2023-11-26 11:44:29,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 96 transitions, 481 flow [2023-11-26 11:44:29,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 96 transitions, 473 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:29,539 INFO L231 Difference]: Finished difference. Result has 93 places, 76 transitions, 263 flow [2023-11-26 11:44:29,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=93, PETRI_TRANSITIONS=76} [2023-11-26 11:44:29,540 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 17 predicate places. [2023-11-26 11:44:29,540 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 76 transitions, 263 flow [2023-11-26 11:44:29,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:29,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:29,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:29,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:29,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:29,746 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:29,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2021454872, now seen corresponding path program 1 times [2023-11-26 11:44:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:29,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891840872] [2023-11-26 11:44:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:29,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:29,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:29,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891840872] [2023-11-26 11:44:29,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891840872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:29,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981385213] [2023-11-26 11:44:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:29,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:29,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:29,893 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:29,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:44:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:30,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:30,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:30,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:30,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981385213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:30,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:30,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-26 11:44:30,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750466068] [2023-11-26 11:44:30,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:30,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:30,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:30,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:30,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:30,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 83 [2023-11-26 11:44:30,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 76 transitions, 263 flow. Second operand has 4 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 11:44:30,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:30,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 83 [2023-11-26 11:44:30,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:30,679 INFO L124 PetriNetUnfolderBase]: 1627/3626 cut-off events. [2023-11-26 11:44:30,679 INFO L125 PetriNetUnfolderBase]: For 2962/2962 co-relation queries the response was YES. [2023-11-26 11:44:30,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8456 conditions, 3626 events. 1627/3626 cut-off events. For 2962/2962 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 26850 event pairs, 1105 based on Foata normal form. 42/3334 useless extension candidates. Maximal degree in co-relation 8439. Up to 2176 conditions per place. [2023-11-26 11:44:30,706 INFO L140 encePairwiseOnDemand]: 77/83 looper letters, 108 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2023-11-26 11:44:30,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 136 transitions, 707 flow [2023-11-26 11:44:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:44:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 270 transitions. [2023-11-26 11:44:30,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506024096385542 [2023-11-26 11:44:30,708 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 270 transitions. [2023-11-26 11:44:30,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 270 transitions. [2023-11-26 11:44:30,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:30,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 270 transitions. [2023-11-26 11:44:30,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 54.0) internal successors, (270), 5 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:30,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:30,712 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:30,712 INFO L175 Difference]: Start difference. First operand has 93 places, 76 transitions, 263 flow. Second operand 5 states and 270 transitions. [2023-11-26 11:44:30,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 136 transitions, 707 flow [2023-11-26 11:44:30,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 696 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:44:30,723 INFO L231 Difference]: Finished difference. Result has 93 places, 75 transitions, 256 flow [2023-11-26 11:44:30,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=93, PETRI_TRANSITIONS=75} [2023-11-26 11:44:30,724 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 17 predicate places. [2023-11-26 11:44:30,724 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 75 transitions, 256 flow [2023-11-26 11:44:30,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 11:44:30,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:30,725 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:30,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:30,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:30,931 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:30,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2021455897, now seen corresponding path program 1 times [2023-11-26 11:44:30,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:30,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916731950] [2023-11-26 11:44:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:30,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:31,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:31,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916731950] [2023-11-26 11:44:31,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916731950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:31,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13427149] [2023-11-26 11:44:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:31,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:31,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:31,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:31,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:44:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:31,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:44:31,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:31,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:31,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13427149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:31,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:31,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-26 11:44:31,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242321174] [2023-11-26 11:44:31,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:31,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:44:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:31,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:44:31,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:44:31,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 83 [2023-11-26 11:44:31,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 75 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:31,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:31,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 83 [2023-11-26 11:44:31,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:31,912 INFO L124 PetriNetUnfolderBase]: 1693/3652 cut-off events. [2023-11-26 11:44:31,912 INFO L125 PetriNetUnfolderBase]: For 2708/2708 co-relation queries the response was YES. [2023-11-26 11:44:31,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8623 conditions, 3652 events. 1693/3652 cut-off events. For 2708/2708 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 26383 event pairs, 1165 based on Foata normal form. 42/3442 useless extension candidates. Maximal degree in co-relation 8607. Up to 2283 conditions per place. [2023-11-26 11:44:31,943 INFO L140 encePairwiseOnDemand]: 76/83 looper letters, 108 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2023-11-26 11:44:31,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 136 transitions, 708 flow [2023-11-26 11:44:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:44:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:44:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 301 transitions. [2023-11-26 11:44:31,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6044176706827309 [2023-11-26 11:44:31,947 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 301 transitions. [2023-11-26 11:44:31,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 301 transitions. [2023-11-26 11:44:31,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:31,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 301 transitions. [2023-11-26 11:44:31,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.166666666666664) internal successors, (301), 6 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:31,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:31,953 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:31,953 INFO L175 Difference]: Start difference. First operand has 93 places, 75 transitions, 256 flow. Second operand 6 states and 301 transitions. [2023-11-26 11:44:31,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 136 transitions, 708 flow [2023-11-26 11:44:31,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 136 transitions, 699 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:31,964 INFO L231 Difference]: Finished difference. Result has 96 places, 75 transitions, 263 flow [2023-11-26 11:44:31,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=96, PETRI_TRANSITIONS=75} [2023-11-26 11:44:31,965 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 20 predicate places. [2023-11-26 11:44:31,965 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 75 transitions, 263 flow [2023-11-26 11:44:31,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:31,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:31,966 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:31,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:32,173 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:32,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1759377484, now seen corresponding path program 1 times [2023-11-26 11:44:32,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:32,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881607356] [2023-11-26 11:44:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:32,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:32,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:32,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881607356] [2023-11-26 11:44:32,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881607356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:32,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306795043] [2023-11-26 11:44:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:32,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:32,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:32,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:32,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:44:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:32,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:44:32,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:32,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:32,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306795043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:32,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:32,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-26 11:44:32,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325842501] [2023-11-26 11:44:32,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:32,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:44:32,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:32,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:44:32,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:44:32,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 83 [2023-11-26 11:44:32,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 75 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 37.5) internal successors, (225), 6 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:32,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:32,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 83 [2023-11-26 11:44:32,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:33,217 INFO L124 PetriNetUnfolderBase]: 1897/3932 cut-off events. [2023-11-26 11:44:33,217 INFO L125 PetriNetUnfolderBase]: For 3330/3334 co-relation queries the response was YES. [2023-11-26 11:44:33,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9596 conditions, 3932 events. 1897/3932 cut-off events. For 3330/3334 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 28021 event pairs, 891 based on Foata normal form. 88/3862 useless extension candidates. Maximal degree in co-relation 9579. Up to 1795 conditions per place. [2023-11-26 11:44:33,238 INFO L140 encePairwiseOnDemand]: 74/83 looper letters, 124 selfloop transitions, 11 changer transitions 0/157 dead transitions. [2023-11-26 11:44:33,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 157 transitions, 839 flow [2023-11-26 11:44:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:44:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:44:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 351 transitions. [2023-11-26 11:44:33,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041308089500861 [2023-11-26 11:44:33,240 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 351 transitions. [2023-11-26 11:44:33,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 351 transitions. [2023-11-26 11:44:33,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:33,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 351 transitions. [2023-11-26 11:44:33,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 50.142857142857146) internal successors, (351), 7 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:33,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 83.0) internal successors, (664), 8 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:33,243 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 83.0) internal successors, (664), 8 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:33,243 INFO L175 Difference]: Start difference. First operand has 96 places, 75 transitions, 263 flow. Second operand 7 states and 351 transitions. [2023-11-26 11:44:33,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 157 transitions, 839 flow [2023-11-26 11:44:33,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 157 transitions, 825 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 11:44:33,258 INFO L231 Difference]: Finished difference. Result has 99 places, 77 transitions, 291 flow [2023-11-26 11:44:33,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=99, PETRI_TRANSITIONS=77} [2023-11-26 11:44:33,259 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 23 predicate places. [2023-11-26 11:44:33,259 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 77 transitions, 291 flow [2023-11-26 11:44:33,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.5) internal successors, (225), 6 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:33,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:33,260 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:33,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-26 11:44:33,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-26 11:44:33,466 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:33,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:33,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1018049971, now seen corresponding path program 1 times [2023-11-26 11:44:33,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:33,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076215796] [2023-11-26 11:44:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:33,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:33,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076215796] [2023-11-26 11:44:33,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076215796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918967224] [2023-11-26 11:44:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:33,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:33,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:33,602 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:33,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:44:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:33,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:33,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:33,792 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:33,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918967224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:33,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:33,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-26 11:44:33,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065563477] [2023-11-26 11:44:33,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:33,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:33,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:33,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 83 [2023-11-26 11:44:33,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 77 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:33,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:33,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 83 [2023-11-26 11:44:33,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:34,449 INFO L124 PetriNetUnfolderBase]: 2024/4467 cut-off events. [2023-11-26 11:44:34,450 INFO L125 PetriNetUnfolderBase]: For 4291/4357 co-relation queries the response was YES. [2023-11-26 11:44:34,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10930 conditions, 4467 events. 2024/4467 cut-off events. For 4291/4357 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 34354 event pairs, 1380 based on Foata normal form. 60/4181 useless extension candidates. Maximal degree in co-relation 10911. Up to 2647 conditions per place. [2023-11-26 11:44:34,478 INFO L140 encePairwiseOnDemand]: 76/83 looper letters, 124 selfloop transitions, 6 changer transitions 0/153 dead transitions. [2023-11-26 11:44:34,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 153 transitions, 943 flow [2023-11-26 11:44:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:44:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 271 transitions. [2023-11-26 11:44:34,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653012048192771 [2023-11-26 11:44:34,480 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 271 transitions. [2023-11-26 11:44:34,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 271 transitions. [2023-11-26 11:44:34,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:34,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 271 transitions. [2023-11-26 11:44:34,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:34,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:34,483 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:34,483 INFO L175 Difference]: Start difference. First operand has 99 places, 77 transitions, 291 flow. Second operand 5 states and 271 transitions. [2023-11-26 11:44:34,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 153 transitions, 943 flow [2023-11-26 11:44:34,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 153 transitions, 911 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:34,505 INFO L231 Difference]: Finished difference. Result has 103 places, 80 transitions, 315 flow [2023-11-26 11:44:34,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=103, PETRI_TRANSITIONS=80} [2023-11-26 11:44:34,506 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 27 predicate places. [2023-11-26 11:44:34,506 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 80 transitions, 315 flow [2023-11-26 11:44:34,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:34,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:34,507 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:34,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:34,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-26 11:44:34,713 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:34,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:34,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1018048946, now seen corresponding path program 1 times [2023-11-26 11:44:34,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:34,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870544815] [2023-11-26 11:44:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:34,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:34,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870544815] [2023-11-26 11:44:34,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870544815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384918333] [2023-11-26 11:44:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:34,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:34,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:34,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:34,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:44:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:34,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:44:34,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:35,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:35,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384918333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:35,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:35,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-26 11:44:35,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913427049] [2023-11-26 11:44:35,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:35,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:44:35,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:35,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:44:35,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:44:35,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 83 [2023-11-26 11:44:35,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 80 transitions, 315 flow. Second operand has 5 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 11:44:35,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:35,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 83 [2023-11-26 11:44:35,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:35,750 INFO L124 PetriNetUnfolderBase]: 2340/4997 cut-off events. [2023-11-26 11:44:35,750 INFO L125 PetriNetUnfolderBase]: For 5408/5506 co-relation queries the response was YES. [2023-11-26 11:44:35,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12875 conditions, 4997 events. 2340/4997 cut-off events. For 5408/5506 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 38047 event pairs, 1672 based on Foata normal form. 136/4939 useless extension candidates. Maximal degree in co-relation 12854. Up to 3222 conditions per place. [2023-11-26 11:44:35,772 INFO L140 encePairwiseOnDemand]: 76/83 looper letters, 126 selfloop transitions, 6 changer transitions 0/154 dead transitions. [2023-11-26 11:44:35,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 154 transitions, 950 flow [2023-11-26 11:44:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:44:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:44:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 302 transitions. [2023-11-26 11:44:35,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.606425702811245 [2023-11-26 11:44:35,774 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 302 transitions. [2023-11-26 11:44:35,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 302 transitions. [2023-11-26 11:44:35,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:35,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 302 transitions. [2023-11-26 11:44:35,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.333333333333336) internal successors, (302), 6 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:35,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:35,785 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:35,785 INFO L175 Difference]: Start difference. First operand has 103 places, 80 transitions, 315 flow. Second operand 6 states and 302 transitions. [2023-11-26 11:44:35,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 154 transitions, 950 flow [2023-11-26 11:44:35,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 154 transitions, 947 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:44:35,812 INFO L231 Difference]: Finished difference. Result has 108 places, 81 transitions, 336 flow [2023-11-26 11:44:35,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=108, PETRI_TRANSITIONS=81} [2023-11-26 11:44:35,813 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 32 predicate places. [2023-11-26 11:44:35,813 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 81 transitions, 336 flow [2023-11-26 11:44:35,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 11:44:35,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:35,813 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:35,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:36,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-26 11:44:36,020 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:36,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:36,020 INFO L85 PathProgramCache]: Analyzing trace with hash -346554899, now seen corresponding path program 1 times [2023-11-26 11:44:36,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:36,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917518782] [2023-11-26 11:44:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:36,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:36,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:36,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917518782] [2023-11-26 11:44:36,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917518782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:36,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392666792] [2023-11-26 11:44:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:36,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:36,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:36,118 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:36,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:44:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:36,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:36,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:36,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:36,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392666792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:36,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:36,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-26 11:44:36,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859492106] [2023-11-26 11:44:36,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:36,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:36,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:36,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 83 [2023-11-26 11:44:36,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 81 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:36,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:36,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 83 [2023-11-26 11:44:36,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:37,043 INFO L124 PetriNetUnfolderBase]: 2201/4840 cut-off events. [2023-11-26 11:44:37,044 INFO L125 PetriNetUnfolderBase]: For 5769/5825 co-relation queries the response was YES. [2023-11-26 11:44:37,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12714 conditions, 4840 events. 2201/4840 cut-off events. For 5769/5825 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 37349 event pairs, 1397 based on Foata normal form. 92/4764 useless extension candidates. Maximal degree in co-relation 12691. Up to 2786 conditions per place. [2023-11-26 11:44:37,073 INFO L140 encePairwiseOnDemand]: 77/83 looper letters, 123 selfloop transitions, 6 changer transitions 0/152 dead transitions. [2023-11-26 11:44:37,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 152 transitions, 948 flow [2023-11-26 11:44:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:44:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2023-11-26 11:44:37,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6457831325301204 [2023-11-26 11:44:37,075 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 268 transitions. [2023-11-26 11:44:37,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 268 transitions. [2023-11-26 11:44:37,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:37,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 268 transitions. [2023-11-26 11:44:37,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.6) internal successors, (268), 5 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:37,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:37,079 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:37,079 INFO L175 Difference]: Start difference. First operand has 108 places, 81 transitions, 336 flow. Second operand 5 states and 268 transitions. [2023-11-26 11:44:37,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 152 transitions, 948 flow [2023-11-26 11:44:37,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 152 transitions, 917 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 11:44:37,114 INFO L231 Difference]: Finished difference. Result has 106 places, 80 transitions, 329 flow [2023-11-26 11:44:37,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=329, PETRI_PLACES=106, PETRI_TRANSITIONS=80} [2023-11-26 11:44:37,115 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 30 predicate places. [2023-11-26 11:44:37,115 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 80 transitions, 329 flow [2023-11-26 11:44:37,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:37,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:37,115 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:37,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:37,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-26 11:44:37,316 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:37,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:37,316 INFO L85 PathProgramCache]: Analyzing trace with hash -346555924, now seen corresponding path program 1 times [2023-11-26 11:44:37,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:37,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577874734] [2023-11-26 11:44:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:37,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:37,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:37,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577874734] [2023-11-26 11:44:37,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577874734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:37,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985140423] [2023-11-26 11:44:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:37,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:37,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:37,434 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:37,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:44:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:37,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:37,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:37,624 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:37,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985140423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:37,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:37,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-26 11:44:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142901324] [2023-11-26 11:44:37,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:37,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:37,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 83 [2023-11-26 11:44:37,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 80 transitions, 329 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:37,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:37,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 83 [2023-11-26 11:44:37,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:38,307 INFO L124 PetriNetUnfolderBase]: 2450/5053 cut-off events. [2023-11-26 11:44:38,307 INFO L125 PetriNetUnfolderBase]: For 5585/5641 co-relation queries the response was YES. [2023-11-26 11:44:38,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13650 conditions, 5053 events. 2450/5053 cut-off events. For 5585/5641 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 37525 event pairs, 1552 based on Foata normal form. 86/4985 useless extension candidates. Maximal degree in co-relation 13627. Up to 3061 conditions per place. [2023-11-26 11:44:38,340 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 96 selfloop transitions, 6 changer transitions 7/129 dead transitions. [2023-11-26 11:44:38,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 129 transitions, 781 flow [2023-11-26 11:44:38,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 223 transitions. [2023-11-26 11:44:38,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6716867469879518 [2023-11-26 11:44:38,342 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 223 transitions. [2023-11-26 11:44:38,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 223 transitions. [2023-11-26 11:44:38,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:38,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 223 transitions. [2023-11-26 11:44:38,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:38,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:38,345 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:38,345 INFO L175 Difference]: Start difference. First operand has 106 places, 80 transitions, 329 flow. Second operand 4 states and 223 transitions. [2023-11-26 11:44:38,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 129 transitions, 781 flow [2023-11-26 11:44:38,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 129 transitions, 759 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-26 11:44:38,380 INFO L231 Difference]: Finished difference. Result has 104 places, 80 transitions, 326 flow [2023-11-26 11:44:38,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=326, PETRI_PLACES=104, PETRI_TRANSITIONS=80} [2023-11-26 11:44:38,381 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 28 predicate places. [2023-11-26 11:44:38,381 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 80 transitions, 326 flow [2023-11-26 11:44:38,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:38,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:38,382 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:38,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:38,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-26 11:44:38,582 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:38,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1494747136, now seen corresponding path program 1 times [2023-11-26 11:44:38,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:38,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810880054] [2023-11-26 11:44:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:38,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:38,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:38,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810880054] [2023-11-26 11:44:38,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810880054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:38,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301098222] [2023-11-26 11:44:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:38,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:38,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:38,708 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:38,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:44:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:38,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:44:38,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:38,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:38,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301098222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:38,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:38,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-26 11:44:38,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963537679] [2023-11-26 11:44:38,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:38,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:44:38,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:38,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:44:38,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:44:39,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 83 [2023-11-26 11:44:39,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 80 transitions, 326 flow. Second operand has 6 states, 6 states have (on average 37.833333333333336) internal successors, (227), 6 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:39,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:39,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 83 [2023-11-26 11:44:39,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:39,880 INFO L124 PetriNetUnfolderBase]: 2577/5252 cut-off events. [2023-11-26 11:44:39,880 INFO L125 PetriNetUnfolderBase]: For 6599/6693 co-relation queries the response was YES. [2023-11-26 11:44:39,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14198 conditions, 5252 events. 2577/5252 cut-off events. For 6599/6693 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 38898 event pairs, 1088 based on Foata normal form. 170/5336 useless extension candidates. Maximal degree in co-relation 14176. Up to 2226 conditions per place. [2023-11-26 11:44:39,922 INFO L140 encePairwiseOnDemand]: 74/83 looper letters, 144 selfloop transitions, 13 changer transitions 0/178 dead transitions. [2023-11-26 11:44:39,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 178 transitions, 1146 flow [2023-11-26 11:44:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:44:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:44:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 351 transitions. [2023-11-26 11:44:39,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041308089500861 [2023-11-26 11:44:39,925 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 351 transitions. [2023-11-26 11:44:39,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 351 transitions. [2023-11-26 11:44:39,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:39,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 351 transitions. [2023-11-26 11:44:39,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 50.142857142857146) internal successors, (351), 7 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:39,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 83.0) internal successors, (664), 8 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:39,929 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 83.0) internal successors, (664), 8 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:39,929 INFO L175 Difference]: Start difference. First operand has 104 places, 80 transitions, 326 flow. Second operand 7 states and 351 transitions. [2023-11-26 11:44:39,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 178 transitions, 1146 flow [2023-11-26 11:44:39,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 178 transitions, 1088 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-26 11:44:39,973 INFO L231 Difference]: Finished difference. Result has 109 places, 82 transitions, 358 flow [2023-11-26 11:44:39,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=358, PETRI_PLACES=109, PETRI_TRANSITIONS=82} [2023-11-26 11:44:39,974 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 33 predicate places. [2023-11-26 11:44:39,975 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 82 transitions, 358 flow [2023-11-26 11:44:39,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.833333333333336) internal successors, (227), 6 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:39,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:39,975 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:39,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:40,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-26 11:44:40,181 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:40,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:40,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1424797305, now seen corresponding path program 1 times [2023-11-26 11:44:40,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:40,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831466069] [2023-11-26 11:44:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:40,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:40,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:40,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831466069] [2023-11-26 11:44:40,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831466069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:40,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763059717] [2023-11-26 11:44:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:40,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:40,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:40,279 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:40,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 11:44:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:40,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:40,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:40,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:40,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763059717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:40,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:40,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-26 11:44:40,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529117504] [2023-11-26 11:44:40,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:40,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:40,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:40,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 83 [2023-11-26 11:44:40,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 82 transitions, 358 flow. Second operand has 4 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 11:44:40,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:40,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 83 [2023-11-26 11:44:40,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:41,150 INFO L124 PetriNetUnfolderBase]: 2348/4999 cut-off events. [2023-11-26 11:44:41,150 INFO L125 PetriNetUnfolderBase]: For 7001/7057 co-relation queries the response was YES. [2023-11-26 11:44:41,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14271 conditions, 4999 events. 2348/4999 cut-off events. For 7001/7057 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 37981 event pairs, 1818 based on Foata normal form. 92/4983 useless extension candidates. Maximal degree in co-relation 14247. Up to 3537 conditions per place. [2023-11-26 11:44:41,196 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 84 selfloop transitions, 3 changer transitions 24/133 dead transitions. [2023-11-26 11:44:41,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 133 transitions, 876 flow [2023-11-26 11:44:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2023-11-26 11:44:41,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746987951807228 [2023-11-26 11:44:41,197 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 224 transitions. [2023-11-26 11:44:41,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 224 transitions. [2023-11-26 11:44:41,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:41,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 224 transitions. [2023-11-26 11:44:41,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:41,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:41,200 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:41,200 INFO L175 Difference]: Start difference. First operand has 109 places, 82 transitions, 358 flow. Second operand 4 states and 224 transitions. [2023-11-26 11:44:41,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 133 transitions, 876 flow [2023-11-26 11:44:41,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 133 transitions, 842 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:44:41,263 INFO L231 Difference]: Finished difference. Result has 107 places, 73 transitions, 293 flow [2023-11-26 11:44:41,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=107, PETRI_TRANSITIONS=73} [2023-11-26 11:44:41,264 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 31 predicate places. [2023-11-26 11:44:41,264 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 73 transitions, 293 flow [2023-11-26 11:44:41,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 11:44:41,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:41,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:41,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:41,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-26 11:44:41,470 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:41,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:41,470 INFO L85 PathProgramCache]: Analyzing trace with hash 39838936, now seen corresponding path program 1 times [2023-11-26 11:44:41,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:41,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925404030] [2023-11-26 11:44:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:41,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:41,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:41,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925404030] [2023-11-26 11:44:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925404030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:41,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308656429] [2023-11-26 11:44:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:41,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:41,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:41,569 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:41,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-26 11:44:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:41,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:41,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:41,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:41,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308656429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:41,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:41,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-26 11:44:41,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389407310] [2023-11-26 11:44:41,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:41,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:41,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:41,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:41,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:41,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 83 [2023-11-26 11:44:41,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 73 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:41,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:41,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 83 [2023-11-26 11:44:41,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:42,448 INFO L124 PetriNetUnfolderBase]: 1631/3750 cut-off events. [2023-11-26 11:44:42,448 INFO L125 PetriNetUnfolderBase]: For 4129/4151 co-relation queries the response was YES. [2023-11-26 11:44:42,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10017 conditions, 3750 events. 1631/3750 cut-off events. For 4129/4151 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 28564 event pairs, 869 based on Foata normal form. 58/3724 useless extension candidates. Maximal degree in co-relation 9994. Up to 1678 conditions per place. [2023-11-26 11:44:42,468 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 117 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-11-26 11:44:42,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 144 transitions, 881 flow [2023-11-26 11:44:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:44:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:44:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2023-11-26 11:44:42,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.636144578313253 [2023-11-26 11:44:42,469 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 264 transitions. [2023-11-26 11:44:42,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 264 transitions. [2023-11-26 11:44:42,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:42,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 264 transitions. [2023-11-26 11:44:42,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 52.8) internal successors, (264), 5 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:42,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:42,472 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:42,472 INFO L175 Difference]: Start difference. First operand has 107 places, 73 transitions, 293 flow. Second operand 5 states and 264 transitions. [2023-11-26 11:44:42,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 144 transitions, 881 flow [2023-11-26 11:44:42,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 144 transitions, 824 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-11-26 11:44:42,501 INFO L231 Difference]: Finished difference. Result has 96 places, 72 transitions, 272 flow [2023-11-26 11:44:42,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=96, PETRI_TRANSITIONS=72} [2023-11-26 11:44:42,502 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 20 predicate places. [2023-11-26 11:44:42,503 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 72 transitions, 272 flow [2023-11-26 11:44:42,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:42,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:42,503 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:42,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-26 11:44:42,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-26 11:44:42,709 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:42,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash 39837911, now seen corresponding path program 1 times [2023-11-26 11:44:42,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:42,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136044670] [2023-11-26 11:44:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:42,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:42,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:42,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136044670] [2023-11-26 11:44:42,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136044670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:42,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983975725] [2023-11-26 11:44:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:42,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:42,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:42,812 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:42,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-26 11:44:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:42,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:42,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:43,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:43,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983975725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:43,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:43,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-26 11:44:43,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839678705] [2023-11-26 11:44:43,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:43,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:43,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:43,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:43,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:43,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 83 [2023-11-26 11:44:43,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 72 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:43,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:43,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 83 [2023-11-26 11:44:43,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:43,604 INFO L124 PetriNetUnfolderBase]: 2026/4085 cut-off events. [2023-11-26 11:44:43,604 INFO L125 PetriNetUnfolderBase]: For 3711/3737 co-relation queries the response was YES. [2023-11-26 11:44:43,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10951 conditions, 4085 events. 2026/4085 cut-off events. For 3711/3737 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 28577 event pairs, 1015 based on Foata normal form. 108/4099 useless extension candidates. Maximal degree in co-relation 10932. Up to 1940 conditions per place. [2023-11-26 11:44:43,625 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 99 selfloop transitions, 3 changer transitions 2/122 dead transitions. [2023-11-26 11:44:43,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 702 flow [2023-11-26 11:44:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2023-11-26 11:44:43,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6656626506024096 [2023-11-26 11:44:43,626 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 221 transitions. [2023-11-26 11:44:43,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 221 transitions. [2023-11-26 11:44:43,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:43,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 221 transitions. [2023-11-26 11:44:43,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:43,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:43,628 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:43,628 INFO L175 Difference]: Start difference. First operand has 96 places, 72 transitions, 272 flow. Second operand 4 states and 221 transitions. [2023-11-26 11:44:43,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 702 flow [2023-11-26 11:44:43,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 122 transitions, 689 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:44:43,654 INFO L231 Difference]: Finished difference. Result has 95 places, 71 transitions, 263 flow [2023-11-26 11:44:43,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=95, PETRI_TRANSITIONS=71} [2023-11-26 11:44:43,654 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 19 predicate places. [2023-11-26 11:44:43,655 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 71 transitions, 263 flow [2023-11-26 11:44:43,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:43,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:44:43,655 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:43,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:43,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:43,860 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-11-26 11:44:43,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:43,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1963477019, now seen corresponding path program 1 times [2023-11-26 11:44:43,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:43,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474029872] [2023-11-26 11:44:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:43,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:44:43,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:43,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474029872] [2023-11-26 11:44:43,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474029872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:44:43,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541830687] [2023-11-26 11:44:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:43,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:44:43,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:43,957 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:44:43,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-26 11:44:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:44,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:44:44,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:44:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:44:44,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:44:44,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541830687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:44,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:44:44,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-26 11:44:44,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247988783] [2023-11-26 11:44:44,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:44,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:44,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:44,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 83 [2023-11-26 11:44:44,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 71 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:44,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:44:44,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 83 [2023-11-26 11:44:44,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:44:44,646 INFO L124 PetriNetUnfolderBase]: 1473/3202 cut-off events. [2023-11-26 11:44:44,646 INFO L125 PetriNetUnfolderBase]: For 2540/2550 co-relation queries the response was YES. [2023-11-26 11:44:44,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8436 conditions, 3202 events. 1473/3202 cut-off events. For 2540/2550 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 22708 event pairs, 1015 based on Foata normal form. 104/3212 useless extension candidates. Maximal degree in co-relation 8418. Up to 1940 conditions per place. [2023-11-26 11:44:44,655 INFO L140 encePairwiseOnDemand]: 80/83 looper letters, 0 selfloop transitions, 0 changer transitions 118/118 dead transitions. [2023-11-26 11:44:44,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 118 transitions, 667 flow [2023-11-26 11:44:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:44:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 219 transitions. [2023-11-26 11:44:44,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6596385542168675 [2023-11-26 11:44:44,657 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 219 transitions. [2023-11-26 11:44:44,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 219 transitions. [2023-11-26 11:44:44,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:44:44,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 219 transitions. [2023-11-26 11:44:44,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:44,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:44,658 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:44,658 INFO L175 Difference]: Start difference. First operand has 95 places, 71 transitions, 263 flow. Second operand 4 states and 219 transitions. [2023-11-26 11:44:44,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 118 transitions, 667 flow [2023-11-26 11:44:44,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 118 transitions, 659 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-26 11:44:44,672 INFO L231 Difference]: Finished difference. Result has 94 places, 0 transitions, 0 flow [2023-11-26 11:44:44,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=94, PETRI_TRANSITIONS=0} [2023-11-26 11:44:44,673 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 18 predicate places. [2023-11-26 11:44:44,673 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 0 transitions, 0 flow [2023-11-26 11:44:44,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:44,675 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (37 of 38 remaining) [2023-11-26 11:44:44,676 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (36 of 38 remaining) [2023-11-26 11:44:44,676 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (35 of 38 remaining) [2023-11-26 11:44:44,676 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (34 of 38 remaining) [2023-11-26 11:44:44,676 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (33 of 38 remaining) [2023-11-26 11:44:44,676 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (32 of 38 remaining) [2023-11-26 11:44:44,677 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (31 of 38 remaining) [2023-11-26 11:44:44,677 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (30 of 38 remaining) [2023-11-26 11:44:44,677 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 38 remaining) [2023-11-26 11:44:44,677 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 38 remaining) [2023-11-26 11:44:44,677 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 38 remaining) [2023-11-26 11:44:44,678 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 38 remaining) [2023-11-26 11:44:44,678 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 38 remaining) [2023-11-26 11:44:44,678 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 38 remaining) [2023-11-26 11:44:44,678 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 38 remaining) [2023-11-26 11:44:44,678 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 38 remaining) [2023-11-26 11:44:44,678 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 38 remaining) [2023-11-26 11:44:44,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 38 remaining) [2023-11-26 11:44:44,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 38 remaining) [2023-11-26 11:44:44,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 38 remaining) [2023-11-26 11:44:44,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 38 remaining) [2023-11-26 11:44:44,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 38 remaining) [2023-11-26 11:44:44,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 38 remaining) [2023-11-26 11:44:44,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 38 remaining) [2023-11-26 11:44:44,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 38 remaining) [2023-11-26 11:44:44,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 38 remaining) [2023-11-26 11:44:44,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 38 remaining) [2023-11-26 11:44:44,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 38 remaining) [2023-11-26 11:44:44,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 38 remaining) [2023-11-26 11:44:44,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 38 remaining) [2023-11-26 11:44:44,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 38 remaining) [2023-11-26 11:44:44,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 38 remaining) [2023-11-26 11:44:44,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 38 remaining) [2023-11-26 11:44:44,681 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 38 remaining) [2023-11-26 11:44:44,682 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 38 remaining) [2023-11-26 11:44:44,682 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 38 remaining) [2023-11-26 11:44:44,682 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 38 remaining) [2023-11-26 11:44:44,682 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 38 remaining) [2023-11-26 11:44:44,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-26 11:44:44,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-26 11:44:44,889 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:44,894 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-26 11:44:44,895 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 11:44:44,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 11:44:44 BasicIcfg [2023-11-26 11:44:44,900 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 11:44:44,901 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 11:44:44,901 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 11:44:44,901 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 11:44:44,902 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:12" (3/4) ... [2023-11-26 11:44:44,903 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-26 11:44:44,906 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-26 11:44:44,906 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-26 11:44:44,914 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 121 nodes and edges [2023-11-26 11:44:44,915 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2023-11-26 11:44:44,915 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-26 11:44:44,916 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-26 11:44:45,029 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 11:44:45,029 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/witness.yml [2023-11-26 11:44:45,029 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 11:44:45,030 INFO L158 Benchmark]: Toolchain (without parser) took 34347.01ms. Allocated memory was 176.2MB in the beginning and 748.7MB in the end (delta: 572.5MB). Free memory was 128.4MB in the beginning and 599.9MB in the end (delta: -471.5MB). Peak memory consumption was 104.1MB. Max. memory is 16.1GB. [2023-11-26 11:44:45,031 INFO L158 Benchmark]: CDTParser took 1.22ms. Allocated memory is still 134.2MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:44:45,031 INFO L158 Benchmark]: CACSL2BoogieTranslator took 340.53ms. Allocated memory is still 176.2MB. Free memory was 128.4MB in the beginning and 115.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-26 11:44:45,031 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.48ms. Allocated memory is still 176.2MB. Free memory was 115.8MB in the beginning and 113.1MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 11:44:45,032 INFO L158 Benchmark]: Boogie Preprocessor took 66.48ms. Allocated memory is still 176.2MB. Free memory was 113.1MB in the beginning and 109.9MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:44:45,032 INFO L158 Benchmark]: RCFGBuilder took 1295.33ms. Allocated memory is still 176.2MB. Free memory was 109.9MB in the beginning and 99.7MB in the end (delta: 10.2MB). Peak memory consumption was 38.3MB. Max. memory is 16.1GB. [2023-11-26 11:44:45,033 INFO L158 Benchmark]: TraceAbstraction took 32453.26ms. Allocated memory was 176.2MB in the beginning and 748.7MB in the end (delta: 572.5MB). Free memory was 98.7MB in the beginning and 606.2MB in the end (delta: -507.5MB). Peak memory consumption was 426.5MB. Max. memory is 16.1GB. [2023-11-26 11:44:45,033 INFO L158 Benchmark]: Witness Printer took 128.90ms. Allocated memory is still 748.7MB. Free memory was 606.2MB in the beginning and 599.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-26 11:44:45,035 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.22ms. Allocated memory is still 134.2MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 340.53ms. Allocated memory is still 176.2MB. Free memory was 128.4MB in the beginning and 115.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.48ms. Allocated memory is still 176.2MB. Free memory was 115.8MB in the beginning and 113.1MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.48ms. Allocated memory is still 176.2MB. Free memory was 113.1MB in the beginning and 109.9MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1295.33ms. Allocated memory is still 176.2MB. Free memory was 109.9MB in the beginning and 99.7MB in the end (delta: 10.2MB). Peak memory consumption was 38.3MB. Max. memory is 16.1GB. * TraceAbstraction took 32453.26ms. Allocated memory was 176.2MB in the beginning and 748.7MB in the end (delta: 572.5MB). Free memory was 98.7MB in the beginning and 606.2MB in the end (delta: -507.5MB). Peak memory consumption was 426.5MB. Max. memory is 16.1GB. * Witness Printer took 128.90ms. Allocated memory is still 748.7MB. Free memory was 606.2MB in the beginning and 599.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 60]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 60]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 130]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 130]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 131]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 132]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 131]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 132]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 81]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 81]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 130]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 130]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 131]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 132]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 131]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 132]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 123]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 123]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 112]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 112]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 129 locations, 38 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 32.3s, OverallIterations: 31, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 20.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1951 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1680 mSDsluCounter, 208 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 119 mSDsCounter, 83 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5140 IncrementalHoareTripleChecker+Invalid, 5223 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 83 mSolverCounterUnsat, 89 mSDtfsCounter, 5140 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 694 GetRequests, 494 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=358occurred in iteration=27, InterpolantAutomatonStates: 152, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 1137 NumberOfCodeBlocks, 1125 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 1120 ConstructedInterpolants, 0 QuantifiedInterpolants, 2574 SizeOfPredicates, 31 NumberOfNonLiveVariables, 3722 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 54 InterpolantComputations, 28 PerfectInterpolantSequences, 591/662 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 20 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-26 11:44:45,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc61409d-d8af-4ee0-91ed-e67ad57899c0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE