./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu --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 1b3f2e76aa91b47c1b0ab3ebb03a5219efabc6e79eff8c780f49eaa0a2d155ad --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:29,478 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:29,624 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:37:29,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:29,635 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:29,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:29,678 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:29,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:29,680 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:29,685 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:29,686 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:29,687 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:29,687 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:29,689 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:29,690 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:37:29,690 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:29,691 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:29,691 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:29,692 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:29,692 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:37:29,692 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:29,693 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:37:29,694 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:37:29,694 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:37:29,695 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:29,695 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:37:29,696 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:29,696 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:29,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:29,697 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:29,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:29,699 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:29,700 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:29,700 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:37:29,700 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:29,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:29,701 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:29,701 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:37:29,701 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:29,702 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:29,702 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:29,702 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_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b3f2e76aa91b47c1b0ab3ebb03a5219efabc6e79eff8c780f49eaa0a2d155ad [2023-11-19 07:37:30,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:30,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:30,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:30,068 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:30,069 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:30,071 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2023-11-19 07:37:33,102 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:33,334 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:33,334 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2023-11-19 07:37:33,344 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/data/bd368555e/cb1a89c6a33643fb83a0eceb8eb15bb1/FLAG7ee837baf [2023-11-19 07:37:33,361 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/data/bd368555e/cb1a89c6a33643fb83a0eceb8eb15bb1 [2023-11-19 07:37:33,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:33,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:33,367 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:33,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:33,374 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:33,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6f19ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33, skipping insertion in model container [2023-11-19 07:37:33,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,404 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:33,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:33,668 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:33,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:33,727 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:37:33,727 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:37:33,736 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:33,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33 WrapperNode [2023-11-19 07:37:33,736 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:33,738 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:33,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:33,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:33,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,762 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,786 INFO L138 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2023-11-19 07:37:33,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:33,787 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:33,787 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:33,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:33,798 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,802 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,802 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,810 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,816 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,817 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:33,821 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:33,821 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:33,822 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:33,822 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (1/1) ... [2023-11-19 07:37:33,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:33,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:33,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:33,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:33,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:33,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:37:33,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:37:33,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:37:33,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:37:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:37:33,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:37:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:37:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:37:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:37:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:37:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:33,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:37:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:37:33,931 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:37:34,108 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:34,111 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:34,514 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:34,617 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:34,617 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:37:34,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:34 BoogieIcfgContainer [2023-11-19 07:37:34,622 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:34,624 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:34,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:34,633 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:34,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:33" (1/3) ... [2023-11-19 07:37:34,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624a61ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:34, skipping insertion in model container [2023-11-19 07:37:34,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:33" (2/3) ... [2023-11-19 07:37:34,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624a61ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:34, skipping insertion in model container [2023-11-19 07:37:34,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:34" (3/3) ... [2023-11-19 07:37:34,639 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-11-19 07:37:34,648 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:37:34,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:34,658 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-19 07:37:34,658 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:37:34,733 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:37:34,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 118 transitions, 257 flow [2023-11-19 07:37:34,833 INFO L124 PetriNetUnfolderBase]: 7/115 cut-off events. [2023-11-19 07:37:34,834 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:37:34,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 115 events. 7/115 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 116 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-11-19 07:37:34,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 118 transitions, 257 flow [2023-11-19 07:37:34,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 96 transitions, 204 flow [2023-11-19 07:37:34,849 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:37:34,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 96 transitions, 204 flow [2023-11-19 07:37:34,863 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 96 transitions, 204 flow [2023-11-19 07:37:34,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 96 transitions, 204 flow [2023-11-19 07:37:34,891 INFO L124 PetriNetUnfolderBase]: 7/96 cut-off events. [2023-11-19 07:37:34,892 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:37:34,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 96 events. 7/96 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 118 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-11-19 07:37:34,895 INFO L119 LiptonReduction]: Number of co-enabled transitions 1816 [2023-11-19 07:37:39,050 INFO L134 LiptonReduction]: Checked pairs total: 2362 [2023-11-19 07:37:39,051 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-11-19 07:37:39,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:39,076 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;@2902d2f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:39,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-11-19 07:37:39,080 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:37:39,080 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-19 07:37:39,080 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:37:39,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:39,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:37:39,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:37:39,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash 14195643, now seen corresponding path program 1 times [2023-11-19 07:37:39,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:39,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133002713] [2023-11-19 07:37:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:39,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:39,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:39,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133002713] [2023-11-19 07:37:39,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133002713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:39,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:39,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:37:39,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037994055] [2023-11-19 07:37:39,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:39,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:39,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:39,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 205 [2023-11-19 07:37:39,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:39,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:39,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 205 [2023-11-19 07:37:39,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:39,853 INFO L124 PetriNetUnfolderBase]: 1163/1788 cut-off events. [2023-11-19 07:37:39,853 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2023-11-19 07:37:39,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3723 conditions, 1788 events. 1163/1788 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 8736 event pairs, 391 based on Foata normal form. 0/984 useless extension candidates. Maximal degree in co-relation 3430. Up to 925 conditions per place. [2023-11-19 07:37:39,877 INFO L140 encePairwiseOnDemand]: 194/205 looper letters, 35 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-11-19 07:37:39,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 193 flow [2023-11-19 07:37:39,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-11-19 07:37:39,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-19 07:37:39,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-11-19 07:37:39,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-11-19 07:37:39,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:39,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-11-19 07:37:39,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:39,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:39,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:39,916 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 64 flow. Second operand 3 states and 328 transitions. [2023-11-19 07:37:39,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 193 flow [2023-11-19 07:37:39,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 183 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:37:39,925 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 118 flow [2023-11-19 07:37:39,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-11-19 07:37:39,931 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-11-19 07:37:39,931 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 118 flow [2023-11-19 07:37:39,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:39,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:39,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:37:39,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:37:39,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:37:39,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash 14195644, now seen corresponding path program 1 times [2023-11-19 07:37:39,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:39,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887911403] [2023-11-19 07:37:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:39,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:40,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:40,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887911403] [2023-11-19 07:37:40,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887911403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:40,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:40,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:37:40,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134511053] [2023-11-19 07:37:40,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:40,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:40,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:40,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:40,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 205 [2023-11-19 07:37:40,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:40,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:40,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 205 [2023-11-19 07:37:40,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:40,402 INFO L124 PetriNetUnfolderBase]: 1155/1860 cut-off events. [2023-11-19 07:37:40,403 INFO L125 PetriNetUnfolderBase]: For 614/614 co-relation queries the response was YES. [2023-11-19 07:37:40,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4883 conditions, 1860 events. 1155/1860 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9692 event pairs, 311 based on Foata normal form. 78/1524 useless extension candidates. Maximal degree in co-relation 3186. Up to 1081 conditions per place. [2023-11-19 07:37:40,424 INFO L140 encePairwiseOnDemand]: 194/205 looper letters, 41 selfloop transitions, 9 changer transitions 0/52 dead transitions. [2023-11-19 07:37:40,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 52 transitions, 283 flow [2023-11-19 07:37:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:37:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-11-19 07:37:40,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-19 07:37:40,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-11-19 07:37:40,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-11-19 07:37:40,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:40,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-11-19 07:37:40,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:40,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:40,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:40,445 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 118 flow. Second operand 3 states and 328 transitions. [2023-11-19 07:37:40,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 52 transitions, 283 flow [2023-11-19 07:37:40,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 52 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:37:40,454 INFO L231 Difference]: Finished difference. Result has 36 places, 40 transitions, 204 flow [2023-11-19 07:37:40,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=36, PETRI_TRANSITIONS=40} [2023-11-19 07:37:40,455 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-11-19 07:37:40,456 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 40 transitions, 204 flow [2023-11-19 07:37:40,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:40,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:40,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:37:40,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:37:40,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:37:40,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:40,458 INFO L85 PathProgramCache]: Analyzing trace with hash 757135680, now seen corresponding path program 1 times [2023-11-19 07:37:40,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:40,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130655107] [2023-11-19 07:37:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:40,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:40,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:40,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130655107] [2023-11-19 07:37:40,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130655107] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:40,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204054661] [2023-11-19 07:37:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:40,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:40,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:40,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:40,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:37:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:40,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:37:40,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:40,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:41,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204054661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:41,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:41,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:37:41,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409060262] [2023-11-19 07:37:41,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:41,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:37:41,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:41,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:37:41,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:37:41,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 205 [2023-11-19 07:37:41,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 40 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 91.875) internal successors, (735), 8 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:41,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:41,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 205 [2023-11-19 07:37:41,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:41,605 INFO L124 PetriNetUnfolderBase]: 1519/2504 cut-off events. [2023-11-19 07:37:41,605 INFO L125 PetriNetUnfolderBase]: For 1974/1974 co-relation queries the response was YES. [2023-11-19 07:37:41,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7505 conditions, 2504 events. 1519/2504 cut-off events. For 1974/1974 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13469 event pairs, 91 based on Foata normal form. 36/2086 useless extension candidates. Maximal degree in co-relation 5868. Up to 751 conditions per place. [2023-11-19 07:37:41,632 INFO L140 encePairwiseOnDemand]: 194/205 looper letters, 97 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2023-11-19 07:37:41,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 131 transitions, 787 flow [2023-11-19 07:37:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:37:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:37:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 947 transitions. [2023-11-19 07:37:41,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132791327913279 [2023-11-19 07:37:41,637 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 947 transitions. [2023-11-19 07:37:41,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 947 transitions. [2023-11-19 07:37:41,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:41,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 947 transitions. [2023-11-19 07:37:41,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.22222222222223) internal successors, (947), 9 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:41,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:41,647 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:41,647 INFO L175 Difference]: Start difference. First operand has 36 places, 40 transitions, 204 flow. Second operand 9 states and 947 transitions. [2023-11-19 07:37:41,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 131 transitions, 787 flow [2023-11-19 07:37:41,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 131 transitions, 749 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:37:41,656 INFO L231 Difference]: Finished difference. Result has 48 places, 62 transitions, 465 flow [2023-11-19 07:37:41,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=465, PETRI_PLACES=48, PETRI_TRANSITIONS=62} [2023-11-19 07:37:41,657 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-11-19 07:37:41,657 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 62 transitions, 465 flow [2023-11-19 07:37:41,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 91.875) internal successors, (735), 8 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:41,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:41,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:41,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:41,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:41,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:37:41,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:41,879 INFO L85 PathProgramCache]: Analyzing trace with hash 578141635, now seen corresponding path program 1 times [2023-11-19 07:37:41,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:41,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255408993] [2023-11-19 07:37:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:41,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:42,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:42,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255408993] [2023-11-19 07:37:42,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255408993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:42,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416196833] [2023-11-19 07:37:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:42,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:42,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:42,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:42,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:37:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:42,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:37:42,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:42,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:42,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416196833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:42,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:42,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-19 07:37:42,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521410297] [2023-11-19 07:37:42,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:42,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:37:42,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:42,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:37:42,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:37:42,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 205 [2023-11-19 07:37:42,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 62 transitions, 465 flow. Second operand has 11 states, 11 states have (on average 86.45454545454545) internal successors, (951), 11 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:42,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:42,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 205 [2023-11-19 07:37:42,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:44,586 INFO L124 PetriNetUnfolderBase]: 4045/6240 cut-off events. [2023-11-19 07:37:44,586 INFO L125 PetriNetUnfolderBase]: For 12079/12079 co-relation queries the response was YES. [2023-11-19 07:37:44,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22239 conditions, 6240 events. 4045/6240 cut-off events. For 12079/12079 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 35589 event pairs, 137 based on Foata normal form. 150/5580 useless extension candidates. Maximal degree in co-relation 21595. Up to 2021 conditions per place. [2023-11-19 07:37:44,675 INFO L140 encePairwiseOnDemand]: 194/205 looper letters, 211 selfloop transitions, 122 changer transitions 0/335 dead transitions. [2023-11-19 07:37:44,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 335 transitions, 2600 flow [2023-11-19 07:37:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:37:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:37:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1906 transitions. [2023-11-19 07:37:44,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4893453145057766 [2023-11-19 07:37:44,688 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1906 transitions. [2023-11-19 07:37:44,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1906 transitions. [2023-11-19 07:37:44,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:44,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1906 transitions. [2023-11-19 07:37:44,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 100.3157894736842) internal successors, (1906), 19 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:44,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 205.0) internal successors, (4100), 20 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:44,709 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 205.0) internal successors, (4100), 20 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:44,710 INFO L175 Difference]: Start difference. First operand has 48 places, 62 transitions, 465 flow. Second operand 19 states and 1906 transitions. [2023-11-19 07:37:44,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 335 transitions, 2600 flow [2023-11-19 07:37:44,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 335 transitions, 2564 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-11-19 07:37:44,879 INFO L231 Difference]: Finished difference. Result has 80 places, 175 transitions, 2063 flow [2023-11-19 07:37:44,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2063, PETRI_PLACES=80, PETRI_TRANSITIONS=175} [2023-11-19 07:37:44,881 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-11-19 07:37:44,881 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 175 transitions, 2063 flow [2023-11-19 07:37:44,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 86.45454545454545) internal successors, (951), 11 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:44,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:44,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:44,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:45,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:45,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:37:45,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1375743689, now seen corresponding path program 1 times [2023-11-19 07:37:45,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:45,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856964956] [2023-11-19 07:37:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:45,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:45,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:45,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856964956] [2023-11-19 07:37:45,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856964956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:45,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300804909] [2023-11-19 07:37:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:45,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:45,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:45,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:45,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:37:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:45,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:37:45,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:45,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:45,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300804909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:45,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:45,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:37:45,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345810937] [2023-11-19 07:37:45,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:45,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:37:45,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:45,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:37:45,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:37:45,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 205 [2023-11-19 07:37:45,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 175 transitions, 2063 flow. Second operand has 8 states, 8 states have (on average 92.625) internal successors, (741), 8 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:45,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:45,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 205 [2023-11-19 07:37:45,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:47,110 INFO L124 PetriNetUnfolderBase]: 4057/6434 cut-off events. [2023-11-19 07:37:47,110 INFO L125 PetriNetUnfolderBase]: For 52068/52068 co-relation queries the response was YES. [2023-11-19 07:37:47,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28989 conditions, 6434 events. 4057/6434 cut-off events. For 52068/52068 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 38959 event pairs, 229 based on Foata normal form. 372/6522 useless extension candidates. Maximal degree in co-relation 28321. Up to 2403 conditions per place. [2023-11-19 07:37:47,212 INFO L140 encePairwiseOnDemand]: 194/205 looper letters, 161 selfloop transitions, 95 changer transitions 0/258 dead transitions. [2023-11-19 07:37:47,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 258 transitions, 3019 flow [2023-11-19 07:37:47,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:37:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:37:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 837 transitions. [2023-11-19 07:37:47,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103658536585366 [2023-11-19 07:37:47,218 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 837 transitions. [2023-11-19 07:37:47,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 837 transitions. [2023-11-19 07:37:47,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:47,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 837 transitions. [2023-11-19 07:37:47,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 104.625) internal successors, (837), 8 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,227 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,227 INFO L175 Difference]: Start difference. First operand has 80 places, 175 transitions, 2063 flow. Second operand 8 states and 837 transitions. [2023-11-19 07:37:47,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 258 transitions, 3019 flow [2023-11-19 07:37:47,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 258 transitions, 2820 flow, removed 95 selfloop flow, removed 3 redundant places. [2023-11-19 07:37:47,810 INFO L231 Difference]: Finished difference. Result has 86 places, 189 transitions, 2328 flow [2023-11-19 07:37:47,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2328, PETRI_PLACES=86, PETRI_TRANSITIONS=189} [2023-11-19 07:37:47,811 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-11-19 07:37:47,811 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 189 transitions, 2328 flow [2023-11-19 07:37:47,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 92.625) internal successors, (741), 8 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:47,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:47,813 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:47,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:48,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:48,029 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:37:48,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:48,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1571056056, now seen corresponding path program 1 times [2023-11-19 07:37:48,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:48,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630358180] [2023-11-19 07:37:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:48,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:37:48,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:48,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630358180] [2023-11-19 07:37:48,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630358180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:48,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364802568] [2023-11-19 07:37:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:48,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:48,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:48,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:48,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:37:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:48,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:37:48,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:48,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:49,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364802568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:49,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:49,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 4, 4] total 10 [2023-11-19 07:37:49,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940390816] [2023-11-19 07:37:49,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:49,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:37:49,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:49,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:37:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:37:49,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 205 [2023-11-19 07:37:49,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 189 transitions, 2328 flow. Second operand has 12 states, 12 states have (on average 86.41666666666667) internal successors, (1037), 12 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:49,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:49,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 205 [2023-11-19 07:37:49,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:51,841 INFO L124 PetriNetUnfolderBase]: 6579/10583 cut-off events. [2023-11-19 07:37:51,842 INFO L125 PetriNetUnfolderBase]: For 129579/129579 co-relation queries the response was YES. [2023-11-19 07:37:51,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46276 conditions, 10583 events. 6579/10583 cut-off events. For 129579/129579 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 71918 event pairs, 577 based on Foata normal form. 1782/11917 useless extension candidates. Maximal degree in co-relation 45588. Up to 3788 conditions per place. [2023-11-19 07:37:52,010 INFO L140 encePairwiseOnDemand]: 194/205 looper letters, 218 selfloop transitions, 153 changer transitions 8/381 dead transitions. [2023-11-19 07:37:52,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 381 transitions, 4944 flow [2023-11-19 07:37:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:37:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:37:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1083 transitions. [2023-11-19 07:37:52,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802660753880266 [2023-11-19 07:37:52,017 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1083 transitions. [2023-11-19 07:37:52,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1083 transitions. [2023-11-19 07:37:52,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:52,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1083 transitions. [2023-11-19 07:37:52,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 98.45454545454545) internal successors, (1083), 11 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:52,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:52,032 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:52,032 INFO L175 Difference]: Start difference. First operand has 86 places, 189 transitions, 2328 flow. Second operand 11 states and 1083 transitions. [2023-11-19 07:37:52,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 381 transitions, 4944 flow [2023-11-19 07:37:52,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 381 transitions, 4697 flow, removed 79 selfloop flow, removed 2 redundant places. [2023-11-19 07:37:52,671 INFO L231 Difference]: Finished difference. Result has 103 places, 297 transitions, 4444 flow [2023-11-19 07:37:52,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4444, PETRI_PLACES=103, PETRI_TRANSITIONS=297} [2023-11-19 07:37:52,672 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 69 predicate places. [2023-11-19 07:37:52,673 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 297 transitions, 4444 flow [2023-11-19 07:37:52,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 86.41666666666667) internal successors, (1037), 12 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:52,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:52,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:52,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:37:52,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:52,877 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:37:52,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:52,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1792781377, now seen corresponding path program 1 times [2023-11-19 07:37:52,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:52,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611952322] [2023-11-19 07:37:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:53,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611952322] [2023-11-19 07:37:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611952322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488051857] [2023-11-19 07:37:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:53,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:53,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:53,239 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:53,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:37:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:53,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:37:53,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:53,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:54,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488051857] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:54,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:54,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:37:54,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354924451] [2023-11-19 07:37:54,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:54,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:37:54,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:54,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:37:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:37:54,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 205 [2023-11-19 07:37:54,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 297 transitions, 4444 flow. Second operand has 16 states, 16 states have (on average 86.0625) internal successors, (1377), 16 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:54,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:54,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 205 [2023-11-19 07:37:54,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:59,613 INFO L124 PetriNetUnfolderBase]: 11633/18636 cut-off events. [2023-11-19 07:37:59,613 INFO L125 PetriNetUnfolderBase]: For 282666/282666 co-relation queries the response was YES. [2023-11-19 07:37:59,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86441 conditions, 18636 events. 11633/18636 cut-off events. For 282666/282666 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 137404 event pairs, 1117 based on Foata normal form. 2155/19985 useless extension candidates. Maximal degree in co-relation 85565. Up to 3724 conditions per place. [2023-11-19 07:37:59,867 INFO L140 encePairwiseOnDemand]: 194/205 looper letters, 234 selfloop transitions, 415 changer transitions 10/661 dead transitions. [2023-11-19 07:37:59,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 661 transitions, 9793 flow [2023-11-19 07:37:59,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:37:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:37:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1749 transitions. [2023-11-19 07:37:59,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739837398373984 [2023-11-19 07:37:59,876 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1749 transitions. [2023-11-19 07:37:59,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1749 transitions. [2023-11-19 07:37:59,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:59,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1749 transitions. [2023-11-19 07:37:59,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 97.16666666666667) internal successors, (1749), 18 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:59,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 205.0) internal successors, (3895), 19 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:59,892 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 205.0) internal successors, (3895), 19 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:37:59,892 INFO L175 Difference]: Start difference. First operand has 103 places, 297 transitions, 4444 flow. Second operand 18 states and 1749 transitions. [2023-11-19 07:37:59,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 661 transitions, 9793 flow [2023-11-19 07:38:01,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 661 transitions, 9358 flow, removed 217 selfloop flow, removed 1 redundant places. [2023-11-19 07:38:01,953 INFO L231 Difference]: Finished difference. Result has 131 places, 544 transitions, 9570 flow [2023-11-19 07:38:01,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=3945, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9570, PETRI_PLACES=131, PETRI_TRANSITIONS=544} [2023-11-19 07:38:01,954 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 97 predicate places. [2023-11-19 07:38:01,954 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 544 transitions, 9570 flow [2023-11-19 07:38:01,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 86.0625) internal successors, (1377), 16 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:01,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:01,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:01,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 07:38:02,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:02,158 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:38:02,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:02,159 INFO L85 PathProgramCache]: Analyzing trace with hash 171781757, now seen corresponding path program 1 times [2023-11-19 07:38:02,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:02,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665942661] [2023-11-19 07:38:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:02,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:38:02,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:02,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665942661] [2023-11-19 07:38:02,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665942661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:02,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:02,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:38:02,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459083179] [2023-11-19 07:38:02,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:02,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:02,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:02,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 205 [2023-11-19 07:38:02,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 544 transitions, 9570 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:02,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:02,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 205 [2023-11-19 07:38:02,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:06,576 INFO L124 PetriNetUnfolderBase]: 10321/16910 cut-off events. [2023-11-19 07:38:06,576 INFO L125 PetriNetUnfolderBase]: For 213352/213352 co-relation queries the response was YES. [2023-11-19 07:38:06,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82318 conditions, 16910 events. 10321/16910 cut-off events. For 213352/213352 co-relation queries the response was YES. Maximal size of possible extension queue 916. Compared 129798 event pairs, 6667 based on Foata normal form. 554/16968 useless extension candidates. Maximal degree in co-relation 81426. Up to 15200 conditions per place. [2023-11-19 07:38:06,823 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 457 selfloop transitions, 1 changer transitions 0/460 dead transitions. [2023-11-19 07:38:06,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 460 transitions, 8854 flow [2023-11-19 07:38:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:38:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-11-19 07:38:06,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2023-11-19 07:38:06,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-11-19 07:38:06,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-11-19 07:38:06,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:06,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-11-19 07:38:06,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,830 INFO L175 Difference]: Start difference. First operand has 131 places, 544 transitions, 9570 flow. Second operand 3 states and 306 transitions. [2023-11-19 07:38:06,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 460 transitions, 8854 flow [2023-11-19 07:38:08,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 460 transitions, 8263 flow, removed 209 selfloop flow, removed 7 redundant places. [2023-11-19 07:38:08,951 INFO L231 Difference]: Finished difference. Result has 124 places, 460 transitions, 7349 flow [2023-11-19 07:38:08,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=7347, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7349, PETRI_PLACES=124, PETRI_TRANSITIONS=460} [2023-11-19 07:38:08,952 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 90 predicate places. [2023-11-19 07:38:08,952 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 460 transitions, 7349 flow [2023-11-19 07:38:08,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:08,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:08,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:08,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:38:08,953 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:38:08,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:08,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1497412173, now seen corresponding path program 1 times [2023-11-19 07:38:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:08,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116404955] [2023-11-19 07:38:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:08,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:09,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:09,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116404955] [2023-11-19 07:38:09,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116404955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:09,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484044526] [2023-11-19 07:38:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:09,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:09,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:09,262 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:09,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:38:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:09,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:38:09,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:09,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:09,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484044526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:09,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:09,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2023-11-19 07:38:09,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210297989] [2023-11-19 07:38:09,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:09,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:38:09,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:09,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:38:09,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:38:09,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 205 [2023-11-19 07:38:09,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 460 transitions, 7349 flow. Second operand has 12 states, 12 states have (on average 86.5) internal successors, (1038), 12 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:09,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 205 [2023-11-19 07:38:09,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:13,843 INFO L124 PetriNetUnfolderBase]: 10719/17722 cut-off events. [2023-11-19 07:38:13,844 INFO L125 PetriNetUnfolderBase]: For 168565/168565 co-relation queries the response was YES. [2023-11-19 07:38:13,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80949 conditions, 17722 events. 10719/17722 cut-off events. For 168565/168565 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 134938 event pairs, 845 based on Foata normal form. 500/17682 useless extension candidates. Maximal degree in co-relation 80897. Up to 6592 conditions per place. [2023-11-19 07:38:14,060 INFO L140 encePairwiseOnDemand]: 196/205 looper letters, 239 selfloop transitions, 296 changer transitions 10/547 dead transitions. [2023-11-19 07:38:14,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 547 transitions, 8890 flow [2023-11-19 07:38:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:38:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:38:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1131 transitions. [2023-11-19 07:38:14,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45975609756097563 [2023-11-19 07:38:14,073 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1131 transitions. [2023-11-19 07:38:14,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1131 transitions. [2023-11-19 07:38:14,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:14,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1131 transitions. [2023-11-19 07:38:14,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 94.25) internal successors, (1131), 12 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:14,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 205.0) internal successors, (2665), 13 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:14,090 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 205.0) internal successors, (2665), 13 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:14,090 INFO L175 Difference]: Start difference. First operand has 124 places, 460 transitions, 7349 flow. Second operand 12 states and 1131 transitions. [2023-11-19 07:38:14,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 547 transitions, 8890 flow [2023-11-19 07:38:15,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 547 transitions, 8742 flow, removed 25 selfloop flow, removed 6 redundant places. [2023-11-19 07:38:15,072 INFO L231 Difference]: Finished difference. Result has 134 places, 475 transitions, 8622 flow [2023-11-19 07:38:15,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=6578, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8622, PETRI_PLACES=134, PETRI_TRANSITIONS=475} [2023-11-19 07:38:15,074 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 100 predicate places. [2023-11-19 07:38:15,074 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 475 transitions, 8622 flow [2023-11-19 07:38:15,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 86.5) internal successors, (1038), 12 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:15,075 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:15,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:15,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:38:15,283 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:38:15,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash 199581346, now seen corresponding path program 1 times [2023-11-19 07:38:15,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:15,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285795618] [2023-11-19 07:38:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:15,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285795618] [2023-11-19 07:38:15,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285795618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119521912] [2023-11-19 07:38:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:15,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:15,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:15,435 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:15,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:38:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:15,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:38:15,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:15,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:38:15,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119521912] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:15,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:38:15,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 5] total 9 [2023-11-19 07:38:15,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838836281] [2023-11-19 07:38:15,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:15,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:15,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:15,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:15,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:38:15,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 205 [2023-11-19 07:38:15,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 475 transitions, 8622 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:15,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 205 [2023-11-19 07:38:15,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:38:19,711 INFO L124 PetriNetUnfolderBase]: 10041/16910 cut-off events. [2023-11-19 07:38:19,711 INFO L125 PetriNetUnfolderBase]: For 202495/202495 co-relation queries the response was YES. [2023-11-19 07:38:19,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79684 conditions, 16910 events. 10041/16910 cut-off events. For 202495/202495 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 135394 event pairs, 6959 based on Foata normal form. 528/17380 useless extension candidates. Maximal degree in co-relation 79631. Up to 15076 conditions per place. [2023-11-19 07:38:19,894 INFO L140 encePairwiseOnDemand]: 203/205 looper letters, 417 selfloop transitions, 1 changer transitions 0/420 dead transitions. [2023-11-19 07:38:19,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 420 transitions, 8287 flow [2023-11-19 07:38:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:38:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-11-19 07:38:19,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47479674796747967 [2023-11-19 07:38:19,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-11-19 07:38:19,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-11-19 07:38:19,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:38:19,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-11-19 07:38:19,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:19,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:19,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:19,901 INFO L175 Difference]: Start difference. First operand has 134 places, 475 transitions, 8622 flow. Second operand 3 states and 292 transitions. [2023-11-19 07:38:19,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 420 transitions, 8287 flow [2023-11-19 07:38:21,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 420 transitions, 8160 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-11-19 07:38:21,520 INFO L231 Difference]: Finished difference. Result has 133 places, 420 transitions, 7326 flow [2023-11-19 07:38:21,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=7324, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7326, PETRI_PLACES=133, PETRI_TRANSITIONS=420} [2023-11-19 07:38:21,521 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 99 predicate places. [2023-11-19 07:38:21,521 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 420 transitions, 7326 flow [2023-11-19 07:38:21,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:21,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:38:21,522 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:21,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:21,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:38:21,722 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-19 07:38:21,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:21,723 INFO L85 PathProgramCache]: Analyzing trace with hash 125401751, now seen corresponding path program 1 times [2023-11-19 07:38:21,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:21,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913110625] [2023-11-19 07:38:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:21,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:38:21,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913110625] [2023-11-19 07:38:21,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913110625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544517752] [2023-11-19 07:38:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:21,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:21,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:21,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:21,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c155d17-64ca-429d-a041-8c6e5fff1fe2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:38:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:21,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:38:21,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:22,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:22,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544517752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:22,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:22,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 5, 5] total 12 [2023-11-19 07:38:22,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380400236] [2023-11-19 07:38:22,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:22,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:38:22,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:22,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:38:22,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:38:22,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 205 [2023-11-19 07:38:22,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 420 transitions, 7326 flow. Second operand has 13 states, 13 states have (on average 86.46153846153847) internal successors, (1124), 13 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:22,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:38:22,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 205 [2023-11-19 07:38:22,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand