./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/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_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/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_13250e59-52ca-4bd5-b2f4-b67a00d06396/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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:44:49,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:44:49,791 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:44:49,797 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:44:49,798 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:44:49,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:44:49,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:44:49,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:44:49,850 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:44:49,855 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:44:49,856 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:44:49,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:44:49,857 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:44:49,858 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:44:49,858 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:44:49,859 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:44:49,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:44:49,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:44:49,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:44:49,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:44:49,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:44:49,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:44:49,863 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:44:49,863 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:44:49,864 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:44:49,864 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:44:49,864 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:44:49,865 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:44:49,866 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:44:49,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:44:49,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:49,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:44:49,868 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:44:49,868 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:44:49,868 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:44:49,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:44:49,869 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:44:49,869 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:44:49,869 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:44:49,870 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:44:49,870 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:44:49,870 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_13250e59-52ca-4bd5-b2f4-b67a00d06396/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2023-11-19 07:44:50,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:44:50,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:44:50,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:44:50,182 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:44:50,182 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:44:50,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/stack-2.i [2023-11-19 07:44:53,488 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:53,847 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:53,848 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/sv-benchmarks/c/pthread/stack-2.i [2023-11-19 07:44:53,874 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/data/5b03fd5e5/4232e64987dc494a91fda583b7462b67/FLAG2a852c091 [2023-11-19 07:44:53,896 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/data/5b03fd5e5/4232e64987dc494a91fda583b7462b67 [2023-11-19 07:44:53,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:53,903 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:53,908 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:53,908 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:53,914 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:53,915 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:53" (1/1) ... [2023-11-19 07:44:53,916 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d877913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:53, skipping insertion in model container [2023-11-19 07:44:53,916 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:53" (1/1) ... [2023-11-19 07:44:53,986 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:44:54,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:54,527 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:44:54,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:54,679 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:44:54,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54 WrapperNode [2023-11-19 07:44:54,680 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:54,681 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:54,681 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:44:54,681 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:44:54,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,718 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,759 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 173 [2023-11-19 07:44:54,760 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:54,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:44:54,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:44:54,761 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:44:54,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,780 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,781 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,790 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,793 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,796 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,798 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,803 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:44:54,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:44:54,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:44:54,804 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:44:54,805 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (1/1) ... [2023-11-19 07:44:54,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:54,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:54,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:54,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:44:54,889 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:44:54,890 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:44:54,890 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:44:54,890 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:44:54,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:44:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:44:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:44:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:44:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:44:54,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:44:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:44:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:44:54,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:44:54,894 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 07:44:55,063 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:44:55,065 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:44:55,460 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:44:55,473 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:44:55,473 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:44:55,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:55 BoogieIcfgContainer [2023-11-19 07:44:55,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:44:55,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:44:55,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:44:55,485 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:44:55,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:53" (1/3) ... [2023-11-19 07:44:55,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfa3ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:55, skipping insertion in model container [2023-11-19 07:44:55,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:54" (2/3) ... [2023-11-19 07:44:55,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfa3ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:55, skipping insertion in model container [2023-11-19 07:44:55,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:55" (3/3) ... [2023-11-19 07:44:55,489 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-11-19 07:44:55,499 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:44:55,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:44:55,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-19 07:44:55,525 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:44:55,675 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:44:55,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 194 transitions, 402 flow [2023-11-19 07:44:55,824 INFO L124 PetriNetUnfolderBase]: 12/192 cut-off events. [2023-11-19 07:44:55,824 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:44:55,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 12/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 550 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 150. Up to 3 conditions per place. [2023-11-19 07:44:55,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 194 transitions, 402 flow [2023-11-19 07:44:55,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 182 transitions, 373 flow [2023-11-19 07:44:55,852 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:44:55,864 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 182 transitions, 373 flow [2023-11-19 07:44:55,868 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 182 transitions, 373 flow [2023-11-19 07:44:55,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 182 transitions, 373 flow [2023-11-19 07:44:55,945 INFO L124 PetriNetUnfolderBase]: 12/182 cut-off events. [2023-11-19 07:44:55,945 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:44:55,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 182 events. 12/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 458 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 150. Up to 3 conditions per place. [2023-11-19 07:44:55,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 11748 [2023-11-19 07:45:01,288 INFO L134 LiptonReduction]: Checked pairs total: 16661 [2023-11-19 07:45:01,288 INFO L136 LiptonReduction]: Total number of compositions: 182 [2023-11-19 07:45:01,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:45:01,313 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;@345d1d11, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:45:01,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-19 07:45:01,318 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:45:01,318 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-19 07:45:01,319 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:45:01,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:01,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:01,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:01,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:01,326 INFO L85 PathProgramCache]: Analyzing trace with hash -889416851, now seen corresponding path program 1 times [2023-11-19 07:45:01,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:01,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469565680] [2023-11-19 07:45:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:01,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:01,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:01,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469565680] [2023-11-19 07:45:01,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469565680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:01,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:01,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:45:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249660942] [2023-11-19 07:45:01,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:01,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:01,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:01,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:01,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:01,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 376 [2023-11-19 07:45:01,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states 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 07:45:01,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:01,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 376 [2023-11-19 07:45:01,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:02,261 INFO L124 PetriNetUnfolderBase]: 1406/2275 cut-off events. [2023-11-19 07:45:02,262 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-19 07:45:02,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4597 conditions, 2275 events. 1406/2275 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10455 event pairs, 409 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 4306. Up to 1406 conditions per place. [2023-11-19 07:45:02,285 INFO L140 encePairwiseOnDemand]: 367/376 looper letters, 65 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-11-19 07:45:02,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 70 transitions, 293 flow [2023-11-19 07:45:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-11-19 07:45:02,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363475177304965 [2023-11-19 07:45:02,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-11-19 07:45:02,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-11-19 07:45:02,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:02,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-11-19 07:45:02,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 07:45:02,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:02,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:02,329 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 89 flow. Second operand 3 states and 605 transitions. [2023-11-19 07:45:02,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 70 transitions, 293 flow [2023-11-19 07:45:02,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 70 transitions, 285 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:45:02,338 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 122 flow [2023-11-19 07:45:02,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-11-19 07:45:02,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-11-19 07:45:02,344 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 122 flow [2023-11-19 07:45:02,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states 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 07:45:02,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:02,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:02,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:45:02,346 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:02,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:02,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1648153941, now seen corresponding path program 1 times [2023-11-19 07:45:02,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:02,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580538330] [2023-11-19 07:45:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:02,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:02,447 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 07:45:02,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:02,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580538330] [2023-11-19 07:45:02,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580538330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:02,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:02,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:45:02,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592910428] [2023-11-19 07:45:02,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:02,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:02,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:02,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:02,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:02,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 376 [2023-11-19 07:45:02,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 07:45:02,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:02,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 376 [2023-11-19 07:45:02,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:03,037 INFO L124 PetriNetUnfolderBase]: 2140/3521 cut-off events. [2023-11-19 07:45:03,037 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2023-11-19 07:45:03,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7731 conditions, 3521 events. 2140/3521 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18567 event pairs, 1038 based on Foata normal form. 0/2863 useless extension candidates. Maximal degree in co-relation 5896. Up to 2150 conditions per place. [2023-11-19 07:45:03,068 INFO L140 encePairwiseOnDemand]: 371/376 looper letters, 74 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-19 07:45:03,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 77 transitions, 371 flow [2023-11-19 07:45:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-11-19 07:45:03,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354609929078015 [2023-11-19 07:45:03,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-11-19 07:45:03,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-11-19 07:45:03,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:03,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-11-19 07:45:03,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 07:45:03,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:03,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:03,081 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 122 flow. Second operand 3 states and 604 transitions. [2023-11-19 07:45:03,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 77 transitions, 371 flow [2023-11-19 07:45:03,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:45:03,090 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 130 flow [2023-11-19 07:45:03,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-11-19 07:45:03,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-11-19 07:45:03,091 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 130 flow [2023-11-19 07:45:03,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 07:45:03,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:03,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:03,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:45:03,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:03,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash -542493611, now seen corresponding path program 1 times [2023-11-19 07:45:03,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:03,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256890161] [2023-11-19 07:45:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:03,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:03,185 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 07:45:03,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:03,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256890161] [2023-11-19 07:45:03,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256890161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:03,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:03,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:45:03,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312766060] [2023-11-19 07:45:03,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:03,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:03,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:03,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 376 [2023-11-19 07:45:03,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 07:45:03,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:03,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 376 [2023-11-19 07:45:03,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:03,957 INFO L124 PetriNetUnfolderBase]: 3301/5324 cut-off events. [2023-11-19 07:45:03,958 INFO L125 PetriNetUnfolderBase]: For 668/668 co-relation queries the response was YES. [2023-11-19 07:45:03,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12423 conditions, 5324 events. 3301/5324 cut-off events. For 668/668 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 30478 event pairs, 1557 based on Foata normal form. 0/4468 useless extension candidates. Maximal degree in co-relation 10142. Up to 3275 conditions per place. [2023-11-19 07:45:04,006 INFO L140 encePairwiseOnDemand]: 371/376 looper letters, 76 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-11-19 07:45:04,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 79 transitions, 394 flow [2023-11-19 07:45:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:04,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-11-19 07:45:04,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354609929078015 [2023-11-19 07:45:04,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-11-19 07:45:04,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-11-19 07:45:04,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:04,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-11-19 07:45:04,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 07:45:04,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:04,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:04,017 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 130 flow. Second operand 3 states and 604 transitions. [2023-11-19 07:45:04,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 79 transitions, 394 flow [2023-11-19 07:45:04,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 79 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:45:04,022 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 144 flow [2023-11-19 07:45:04,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-11-19 07:45:04,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2023-11-19 07:45:04,028 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 144 flow [2023-11-19 07:45:04,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 07:45:04,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:04,029 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:04,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:45:04,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:04,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1455219364, now seen corresponding path program 1 times [2023-11-19 07:45:04,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:04,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937577628] [2023-11-19 07:45:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:04,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:04,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:04,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937577628] [2023-11-19 07:45:04,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937577628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:04,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:04,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:45:04,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939150591] [2023-11-19 07:45:04,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:04,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:04,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 376 [2023-11-19 07:45:04,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 07:45:04,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:04,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 376 [2023-11-19 07:45:04,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:04,854 INFO L124 PetriNetUnfolderBase]: 2991/4914 cut-off events. [2023-11-19 07:45:04,854 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-11-19 07:45:04,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11606 conditions, 4914 events. 2991/4914 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 27988 event pairs, 339 based on Foata normal form. 0/4340 useless extension candidates. Maximal degree in co-relation 10456. Up to 4622 conditions per place. [2023-11-19 07:45:04,895 INFO L140 encePairwiseOnDemand]: 374/376 looper letters, 62 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-11-19 07:45:04,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 331 flow [2023-11-19 07:45:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-11-19 07:45:04,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2023-11-19 07:45:04,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-11-19 07:45:04,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-11-19 07:45:04,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:04,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-11-19 07:45:04,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 07:45:04,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:04,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:04,907 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 144 flow. Second operand 3 states and 588 transitions. [2023-11-19 07:45:04,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 331 flow [2023-11-19 07:45:04,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:45:04,912 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 140 flow [2023-11-19 07:45:04,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2023-11-19 07:45:04,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2023-11-19 07:45:04,914 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 140 flow [2023-11-19 07:45:04,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 07:45:04,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:04,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:04,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:45:04,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:04,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:04,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1455219280, now seen corresponding path program 1 times [2023-11-19 07:45:04,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:04,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003383439] [2023-11-19 07:45:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:45:04,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:04,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003383439] [2023-11-19 07:45:04,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003383439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:04,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:04,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:45:04,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731666632] [2023-11-19 07:45:04,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:05,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:05,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:05,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 376 [2023-11-19 07:45:05,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 07:45:05,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:05,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 376 [2023-11-19 07:45:05,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:05,632 INFO L124 PetriNetUnfolderBase]: 2841/4664 cut-off events. [2023-11-19 07:45:05,632 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2023-11-19 07:45:05,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10926 conditions, 4664 events. 2841/4664 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 26237 event pairs, 541 based on Foata normal form. 0/4208 useless extension candidates. Maximal degree in co-relation 9826. Up to 3776 conditions per place. [2023-11-19 07:45:05,664 INFO L140 encePairwiseOnDemand]: 372/376 looper letters, 59 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-11-19 07:45:05,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 327 flow [2023-11-19 07:45:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-11-19 07:45:05,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186170212765957 [2023-11-19 07:45:05,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-11-19 07:45:05,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-11-19 07:45:05,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:05,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-11-19 07:45:05,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states 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 07:45:05,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:05,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:05,674 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 140 flow. Second operand 3 states and 585 transitions. [2023-11-19 07:45:05,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 327 flow [2023-11-19 07:45:05,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:45:05,677 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 151 flow [2023-11-19 07:45:05,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-11-19 07:45:05,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2023-11-19 07:45:05,678 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 151 flow [2023-11-19 07:45:05,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 07:45:05,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:05,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:05,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:45:05,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:05,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash -577641778, now seen corresponding path program 1 times [2023-11-19 07:45:05,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:05,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461846500] [2023-11-19 07:45:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:05,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:05,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:05,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461846500] [2023-11-19 07:45:05,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461846500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:05,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120159050] [2023-11-19 07:45:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:05,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:05,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:05,830 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:05,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:45:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:05,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:45:05,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:06,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:06,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120159050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:06,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:06,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-19 07:45:06,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753615549] [2023-11-19 07:45:06,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:06,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:45:06,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:06,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:45:06,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:45:06,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 376 [2023-11-19 07:45:06,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 151 flow. Second operand has 10 states, 10 states have (on average 174.7) internal successors, (1747), 10 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states 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 07:45:06,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:06,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 376 [2023-11-19 07:45:06,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:07,594 INFO L124 PetriNetUnfolderBase]: 5235/8562 cut-off events. [2023-11-19 07:45:07,594 INFO L125 PetriNetUnfolderBase]: For 3636/3636 co-relation queries the response was YES. [2023-11-19 07:45:07,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21350 conditions, 8562 events. 5235/8562 cut-off events. For 3636/3636 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 49440 event pairs, 1065 based on Foata normal form. 110/7922 useless extension candidates. Maximal degree in co-relation 20000. Up to 2827 conditions per place. [2023-11-19 07:45:07,650 INFO L140 encePairwiseOnDemand]: 366/376 looper letters, 248 selfloop transitions, 42 changer transitions 0/291 dead transitions. [2023-11-19 07:45:07,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 291 transitions, 1582 flow [2023-11-19 07:45:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:45:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:45:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3013 transitions. [2023-11-19 07:45:07,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008311170212766 [2023-11-19 07:45:07,663 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3013 transitions. [2023-11-19 07:45:07,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3013 transitions. [2023-11-19 07:45:07,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:07,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3013 transitions. [2023-11-19 07:45:07,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 188.3125) internal successors, (3013), 16 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states 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 07:45:07,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 376.0) internal successors, (6392), 17 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states 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 07:45:07,695 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 376.0) internal successors, (6392), 17 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states 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 07:45:07,695 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 151 flow. Second operand 16 states and 3013 transitions. [2023-11-19 07:45:07,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 291 transitions, 1582 flow [2023-11-19 07:45:07,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 291 transitions, 1539 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:45:07,708 INFO L231 Difference]: Finished difference. Result has 66 places, 82 transitions, 449 flow [2023-11-19 07:45:07,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=449, PETRI_PLACES=66, PETRI_TRANSITIONS=82} [2023-11-19 07:45:07,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2023-11-19 07:45:07,709 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 82 transitions, 449 flow [2023-11-19 07:45:07,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 174.7) internal successors, (1747), 10 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states 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 07:45:07,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:07,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:07,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:45:07,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:45:07,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:07,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1926505914, now seen corresponding path program 1 times [2023-11-19 07:45:07,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:07,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810326783] [2023-11-19 07:45:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:07,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:08,053 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 07:45:08,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:08,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810326783] [2023-11-19 07:45:08,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810326783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:08,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:08,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:45:08,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073149967] [2023-11-19 07:45:08,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:08,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:08,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:08,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:08,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:08,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 376 [2023-11-19 07:45:08,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 82 transitions, 449 flow. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states 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 07:45:08,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:08,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 376 [2023-11-19 07:45:08,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:08,682 INFO L124 PetriNetUnfolderBase]: 1681/3028 cut-off events. [2023-11-19 07:45:08,683 INFO L125 PetriNetUnfolderBase]: For 2734/2734 co-relation queries the response was YES. [2023-11-19 07:45:08,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8789 conditions, 3028 events. 1681/3028 cut-off events. For 2734/2734 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 16674 event pairs, 301 based on Foata normal form. 288/3166 useless extension candidates. Maximal degree in co-relation 8051. Up to 2344 conditions per place. [2023-11-19 07:45:08,705 INFO L140 encePairwiseOnDemand]: 369/376 looper letters, 59 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2023-11-19 07:45:08,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 463 flow [2023-11-19 07:45:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-11-19 07:45:08,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097517730496454 [2023-11-19 07:45:08,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-11-19 07:45:08,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-11-19 07:45:08,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:08,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-11-19 07:45:08,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 07:45:08,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:08,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:08,718 INFO L175 Difference]: Start difference. First operand has 66 places, 82 transitions, 449 flow. Second operand 3 states and 575 transitions. [2023-11-19 07:45:08,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 463 flow [2023-11-19 07:45:08,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 427 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-19 07:45:08,745 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 265 flow [2023-11-19 07:45:08,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-11-19 07:45:08,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2023-11-19 07:45:08,747 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 265 flow [2023-11-19 07:45:08,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states 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 07:45:08,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:08,748 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:08,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:45:08,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:08,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:08,749 INFO L85 PathProgramCache]: Analyzing trace with hash -728635940, now seen corresponding path program 1 times [2023-11-19 07:45:08,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:08,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398035807] [2023-11-19 07:45:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:08,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:08,916 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 07:45:08,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398035807] [2023-11-19 07:45:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398035807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055012925] [2023-11-19 07:45:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:08,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:08,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:08,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:08,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:45:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:09,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:45:09,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:09,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:09,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055012925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:09,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:45:09,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 07:45:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623261920] [2023-11-19 07:45:09,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:09,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:45:09,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:09,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:45:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:45:09,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 376 [2023-11-19 07:45:09,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states 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 07:45:09,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:09,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 376 [2023-11-19 07:45:09,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:09,687 INFO L124 PetriNetUnfolderBase]: 1723/3178 cut-off events. [2023-11-19 07:45:09,687 INFO L125 PetriNetUnfolderBase]: For 2211/2211 co-relation queries the response was YES. [2023-11-19 07:45:09,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9131 conditions, 3178 events. 1723/3178 cut-off events. For 2211/2211 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 16928 event pairs, 375 based on Foata normal form. 126/3132 useless extension candidates. Maximal degree in co-relation 4661. Up to 1602 conditions per place. [2023-11-19 07:45:09,712 INFO L140 encePairwiseOnDemand]: 366/376 looper letters, 96 selfloop transitions, 18 changer transitions 0/115 dead transitions. [2023-11-19 07:45:09,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 115 transitions, 722 flow [2023-11-19 07:45:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:45:09,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:45:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1128 transitions. [2023-11-19 07:45:09,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-19 07:45:09,718 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1128 transitions. [2023-11-19 07:45:09,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1128 transitions. [2023-11-19 07:45:09,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:09,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1128 transitions. [2023-11-19 07:45:09,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 07:45:09,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 376.0) internal successors, (2632), 7 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states 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 07:45:09,731 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 376.0) internal successors, (2632), 7 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states 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 07:45:09,731 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 265 flow. Second operand 6 states and 1128 transitions. [2023-11-19 07:45:09,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 115 transitions, 722 flow [2023-11-19 07:45:09,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 115 transitions, 703 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:45:09,739 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 344 flow [2023-11-19 07:45:09,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=344, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-11-19 07:45:09,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2023-11-19 07:45:09,745 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 344 flow [2023-11-19 07:45:09,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states 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 07:45:09,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:09,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:09,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:45:09,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:09,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:09,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:09,969 INFO L85 PathProgramCache]: Analyzing trace with hash -632578950, now seen corresponding path program 1 times [2023-11-19 07:45:09,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:09,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921122627] [2023-11-19 07:45:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:09,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:10,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921122627] [2023-11-19 07:45:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921122627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:10,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:10,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:45:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225159345] [2023-11-19 07:45:10,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:10,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:45:10,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:10,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:45:10,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:45:10,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 376 [2023-11-19 07:45:10,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states 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 07:45:10,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:10,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 376 [2023-11-19 07:45:10,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:10,769 INFO L124 PetriNetUnfolderBase]: 1487/2768 cut-off events. [2023-11-19 07:45:10,769 INFO L125 PetriNetUnfolderBase]: For 2788/2788 co-relation queries the response was YES. [2023-11-19 07:45:10,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8270 conditions, 2768 events. 1487/2768 cut-off events. For 2788/2788 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 14619 event pairs, 456 based on Foata normal form. 18/2618 useless extension candidates. Maximal degree in co-relation 4870. Up to 2191 conditions per place. [2023-11-19 07:45:10,792 INFO L140 encePairwiseOnDemand]: 371/376 looper letters, 70 selfloop transitions, 4 changer transitions 6/81 dead transitions. [2023-11-19 07:45:10,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 578 flow [2023-11-19 07:45:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:45:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:45:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-11-19 07:45:10,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946808510638298 [2023-11-19 07:45:10,797 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-11-19 07:45:10,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-11-19 07:45:10,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:10,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-11-19 07:45:10,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states 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 07:45:10,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states 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 07:45:10,807 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states 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 07:45:10,807 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 344 flow. Second operand 4 states and 744 transitions. [2023-11-19 07:45:10,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 578 flow [2023-11-19 07:45:10,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 567 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:45:10,822 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 343 flow [2023-11-19 07:45:10,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=343, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-11-19 07:45:10,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2023-11-19 07:45:10,825 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 343 flow [2023-11-19 07:45:10,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states 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 07:45:10,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:10,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 07:45:10,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:45:10,826 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:10,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash -27858123, now seen corresponding path program 1 times [2023-11-19 07:45:10,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:10,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373720587] [2023-11-19 07:45:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:10,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:10,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:10,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373720587] [2023-11-19 07:45:10,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373720587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:10,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045066174] [2023-11-19 07:45:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:10,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:10,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:10,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:10,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:45:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:11,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:45:11,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:11,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:11,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045066174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:11,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:45:11,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-19 07:45:11,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410271329] [2023-11-19 07:45:11,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:11,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:45:11,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:11,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:45:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:45:11,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 376 [2023-11-19 07:45:11,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states 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 07:45:11,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:11,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 376 [2023-11-19 07:45:11,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:11,585 INFO L124 PetriNetUnfolderBase]: 1367/2512 cut-off events. [2023-11-19 07:45:11,586 INFO L125 PetriNetUnfolderBase]: For 2580/2584 co-relation queries the response was YES. [2023-11-19 07:45:11,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7635 conditions, 2512 events. 1367/2512 cut-off events. For 2580/2584 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 12691 event pairs, 377 based on Foata normal form. 4/2404 useless extension candidates. Maximal degree in co-relation 7138. Up to 2101 conditions per place. [2023-11-19 07:45:11,603 INFO L140 encePairwiseOnDemand]: 373/376 looper letters, 86 selfloop transitions, 2 changer transitions 2/91 dead transitions. [2023-11-19 07:45:11,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 661 flow [2023-11-19 07:45:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:45:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:45:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 777 transitions. [2023-11-19 07:45:11,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166223404255319 [2023-11-19 07:45:11,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 777 transitions. [2023-11-19 07:45:11,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 777 transitions. [2023-11-19 07:45:11,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:11,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 777 transitions. [2023-11-19 07:45:11,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states 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 07:45:11,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states 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 07:45:11,616 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states 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 07:45:11,616 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 343 flow. Second operand 4 states and 777 transitions. [2023-11-19 07:45:11,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 661 flow [2023-11-19 07:45:11,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 657 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:45:11,626 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 339 flow [2023-11-19 07:45:11,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2023-11-19 07:45:11,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2023-11-19 07:45:11,627 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 339 flow [2023-11-19 07:45:11,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states 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 07:45:11,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:11,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 07:45:11,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:11,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:45:11,850 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:11,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:11,850 INFO L85 PathProgramCache]: Analyzing trace with hash -27858122, now seen corresponding path program 1 times [2023-11-19 07:45:11,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:11,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988644270] [2023-11-19 07:45:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:11,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:45:11,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:11,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988644270] [2023-11-19 07:45:11,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988644270] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:11,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:11,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:45:11,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135412378] [2023-11-19 07:45:11,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:11,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:11,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:11,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 376 [2023-11-19 07:45:11,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states 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 07:45:11,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:11,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 376 [2023-11-19 07:45:11,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:12,243 INFO L124 PetriNetUnfolderBase]: 1212/2205 cut-off events. [2023-11-19 07:45:12,244 INFO L125 PetriNetUnfolderBase]: For 2486/2490 co-relation queries the response was YES. [2023-11-19 07:45:12,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6759 conditions, 2205 events. 1212/2205 cut-off events. For 2486/2490 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10990 event pairs, 543 based on Foata normal form. 4/2153 useless extension candidates. Maximal degree in co-relation 4850. Up to 1177 conditions per place. [2023-11-19 07:45:12,260 INFO L140 encePairwiseOnDemand]: 372/376 looper letters, 63 selfloop transitions, 4 changer transitions 2/70 dead transitions. [2023-11-19 07:45:12,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 533 flow [2023-11-19 07:45:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-11-19 07:45:12,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115248226950354 [2023-11-19 07:45:12,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-11-19 07:45:12,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-11-19 07:45:12,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:12,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-11-19 07:45:12,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 07:45:12,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:12,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 07:45:12,272 INFO L175 Difference]: Start difference. First operand has 69 places, 56 transitions, 339 flow. Second operand 3 states and 577 transitions. [2023-11-19 07:45:12,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 533 flow [2023-11-19 07:45:12,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 70 transitions, 530 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:45:12,282 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 342 flow [2023-11-19 07:45:12,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-11-19 07:45:12,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2023-11-19 07:45:12,283 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 342 flow [2023-11-19 07:45:12,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states 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 07:45:12,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:12,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:12,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:45:12,285 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:12,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash -68873674, now seen corresponding path program 1 times [2023-11-19 07:45:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:12,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689613138] [2023-11-19 07:45:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:12,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:12,465 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 07:45:12,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:12,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689613138] [2023-11-19 07:45:12,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689613138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:12,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897946276] [2023-11-19 07:45:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:12,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:12,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:12,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:12,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:45:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:12,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:45:12,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:45:12,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:12,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897946276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:12,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:45:12,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-19 07:45:12,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115596762] [2023-11-19 07:45:12,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:12,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:45:12,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:12,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:45:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:45:12,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 376 [2023-11-19 07:45:12,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 168.83333333333334) internal successors, (1013), 6 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states 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 07:45:12,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:12,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 376 [2023-11-19 07:45:12,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:13,346 INFO L124 PetriNetUnfolderBase]: 1509/2704 cut-off events. [2023-11-19 07:45:13,346 INFO L125 PetriNetUnfolderBase]: For 3409/3409 co-relation queries the response was YES. [2023-11-19 07:45:13,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8515 conditions, 2704 events. 1509/2704 cut-off events. For 3409/3409 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 13399 event pairs, 351 based on Foata normal form. 34/2670 useless extension candidates. Maximal degree in co-relation 5228. Up to 1364 conditions per place. [2023-11-19 07:45:13,368 INFO L140 encePairwiseOnDemand]: 365/376 looper letters, 95 selfloop transitions, 30 changer transitions 0/126 dead transitions. [2023-11-19 07:45:13,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 126 transitions, 932 flow [2023-11-19 07:45:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:45:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:45:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1262 transitions. [2023-11-19 07:45:13,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.479483282674772 [2023-11-19 07:45:13,375 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1262 transitions. [2023-11-19 07:45:13,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1262 transitions. [2023-11-19 07:45:13,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:13,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1262 transitions. [2023-11-19 07:45:13,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 180.28571428571428) internal successors, (1262), 7 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states 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 07:45:13,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 376.0) internal successors, (3008), 8 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 07:45:13,388 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 376.0) internal successors, (3008), 8 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 07:45:13,389 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 342 flow. Second operand 7 states and 1262 transitions. [2023-11-19 07:45:13,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 126 transitions, 932 flow [2023-11-19 07:45:13,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 126 transitions, 905 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-19 07:45:13,402 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 567 flow [2023-11-19 07:45:13,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=567, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-11-19 07:45:13,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2023-11-19 07:45:13,403 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 567 flow [2023-11-19 07:45:13,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 168.83333333333334) internal successors, (1013), 6 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states 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 07:45:13,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:13,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:13,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:13,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:45:13,626 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:13,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:13,627 INFO L85 PathProgramCache]: Analyzing trace with hash 502317133, now seen corresponding path program 1 times [2023-11-19 07:45:13,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:13,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011752253] [2023-11-19 07:45:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:13,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:13,793 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 07:45:13,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:13,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011752253] [2023-11-19 07:45:13,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011752253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:13,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633264199] [2023-11-19 07:45:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:13,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:13,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:13,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:13,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:45:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:13,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:45:13,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:45:14,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:14,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633264199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:14,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:45:14,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-19 07:45:14,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535682671] [2023-11-19 07:45:14,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:14,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:45:14,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:14,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:45:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:45:14,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 376 [2023-11-19 07:45:14,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 567 flow. Second operand has 6 states, 6 states have (on average 168.83333333333334) internal successors, (1013), 6 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states 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 07:45:14,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:14,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 376 [2023-11-19 07:45:14,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:14,774 INFO L124 PetriNetUnfolderBase]: 2065/3686 cut-off events. [2023-11-19 07:45:14,774 INFO L125 PetriNetUnfolderBase]: For 6715/6715 co-relation queries the response was YES. [2023-11-19 07:45:14,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11954 conditions, 3686 events. 2065/3686 cut-off events. For 6715/6715 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 18693 event pairs, 573 based on Foata normal form. 80/3674 useless extension candidates. Maximal degree in co-relation 8841. Up to 1752 conditions per place. [2023-11-19 07:45:14,798 INFO L140 encePairwiseOnDemand]: 365/376 looper letters, 121 selfloop transitions, 27 changer transitions 0/149 dead transitions. [2023-11-19 07:45:14,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 149 transitions, 1285 flow [2023-11-19 07:45:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:45:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:45:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1263 transitions. [2023-11-19 07:45:14,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4798632218844985 [2023-11-19 07:45:14,804 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1263 transitions. [2023-11-19 07:45:14,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1263 transitions. [2023-11-19 07:45:14,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:14,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1263 transitions. [2023-11-19 07:45:14,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 180.42857142857142) internal successors, (1263), 7 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 07:45:14,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 376.0) internal successors, (3008), 8 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 07:45:14,818 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 376.0) internal successors, (3008), 8 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 07:45:14,818 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 567 flow. Second operand 7 states and 1263 transitions. [2023-11-19 07:45:14,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 149 transitions, 1285 flow [2023-11-19 07:45:14,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 149 transitions, 1219 flow, removed 33 selfloop flow, removed 0 redundant places. [2023-11-19 07:45:14,836 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 855 flow [2023-11-19 07:45:14,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=855, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2023-11-19 07:45:14,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2023-11-19 07:45:14,837 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 855 flow [2023-11-19 07:45:14,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 168.83333333333334) internal successors, (1013), 6 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states 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 07:45:14,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:14,838 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2023-11-19 07:45:14,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:15,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:45:15,053 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:15,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1567789709, now seen corresponding path program 1 times [2023-11-19 07:45:15,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:15,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563281398] [2023-11-19 07:45:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:15,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563281398] [2023-11-19 07:45:15,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563281398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017304874] [2023-11-19 07:45:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:15,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:15,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:15,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:15,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:45:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:15,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:45:15,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:15,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:15,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017304874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:15,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:15,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-19 07:45:15,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464551328] [2023-11-19 07:45:15,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:15,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:45:15,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:15,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:45:15,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:45:15,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 376 [2023-11-19 07:45:15,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 855 flow. Second operand has 18 states, 18 states have (on average 175.05555555555554) internal successors, (3151), 18 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states 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 07:45:15,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:15,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 376 [2023-11-19 07:45:15,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:17,483 INFO L124 PetriNetUnfolderBase]: 3297/5908 cut-off events. [2023-11-19 07:45:17,483 INFO L125 PetriNetUnfolderBase]: For 10917/10917 co-relation queries the response was YES. [2023-11-19 07:45:17,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19620 conditions, 5908 events. 3297/5908 cut-off events. For 10917/10917 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 30111 event pairs, 841 based on Foata normal form. 144/5900 useless extension candidates. Maximal degree in co-relation 16942. Up to 2280 conditions per place. [2023-11-19 07:45:17,539 INFO L140 encePairwiseOnDemand]: 366/376 looper letters, 293 selfloop transitions, 41 changer transitions 2/337 dead transitions. [2023-11-19 07:45:17,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 337 transitions, 2647 flow [2023-11-19 07:45:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:45:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:45:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3529 transitions. [2023-11-19 07:45:17,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49398096304591266 [2023-11-19 07:45:17,553 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3529 transitions. [2023-11-19 07:45:17,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3529 transitions. [2023-11-19 07:45:17,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:17,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3529 transitions. [2023-11-19 07:45:17,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 185.73684210526315) internal successors, (3529), 19 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states 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 07:45:17,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 376.0) internal successors, (7520), 20 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states 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 07:45:17,584 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 376.0) internal successors, (7520), 20 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states 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 07:45:17,584 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 855 flow. Second operand 19 states and 3529 transitions. [2023-11-19 07:45:17,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 337 transitions, 2647 flow [2023-11-19 07:45:17,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 337 transitions, 2629 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-11-19 07:45:17,622 INFO L231 Difference]: Finished difference. Result has 109 places, 108 transitions, 1189 flow [2023-11-19 07:45:17,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1189, PETRI_PLACES=109, PETRI_TRANSITIONS=108} [2023-11-19 07:45:17,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2023-11-19 07:45:17,624 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 108 transitions, 1189 flow [2023-11-19 07:45:17,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 175.05555555555554) internal successors, (3151), 18 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states 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 07:45:17,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:17,625 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:17,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:17,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:45:17,844 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:17,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:17,845 INFO L85 PathProgramCache]: Analyzing trace with hash -55272436, now seen corresponding path program 2 times [2023-11-19 07:45:17,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:17,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250918832] [2023-11-19 07:45:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:17,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:45:18,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:18,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250918832] [2023-11-19 07:45:18,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250918832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:18,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243542310] [2023-11-19 07:45:18,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:45:18,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:18,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:18,115 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:18,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:45:18,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:45:18,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:18,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:45:18,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:45:18,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:45:18,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243542310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:18,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:18,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-19 07:45:18,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149564117] [2023-11-19 07:45:18,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:18,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:45:18,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:18,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:45:18,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:45:18,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 376 [2023-11-19 07:45:18,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 108 transitions, 1189 flow. Second operand has 16 states, 16 states have (on average 168.625) internal successors, (2698), 16 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states 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 07:45:18,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:18,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 376 [2023-11-19 07:45:18,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:20,461 INFO L124 PetriNetUnfolderBase]: 4341/7764 cut-off events. [2023-11-19 07:45:20,461 INFO L125 PetriNetUnfolderBase]: For 18873/18873 co-relation queries the response was YES. [2023-11-19 07:45:20,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26399 conditions, 7764 events. 4341/7764 cut-off events. For 18873/18873 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 42225 event pairs, 893 based on Foata normal form. 144/7708 useless extension candidates. Maximal degree in co-relation 22979. Up to 2037 conditions per place. [2023-11-19 07:45:20,513 INFO L140 encePairwiseOnDemand]: 365/376 looper letters, 211 selfloop transitions, 98 changer transitions 2/312 dead transitions. [2023-11-19 07:45:20,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 312 transitions, 2858 flow [2023-11-19 07:45:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:45:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-19 07:45:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3506 transitions. [2023-11-19 07:45:20,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46622340425531916 [2023-11-19 07:45:20,527 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3506 transitions. [2023-11-19 07:45:20,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3506 transitions. [2023-11-19 07:45:20,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:20,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3506 transitions. [2023-11-19 07:45:20,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 175.3) internal successors, (3506), 20 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states 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 07:45:20,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 376.0) internal successors, (7896), 21 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states 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 07:45:20,555 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 376.0) internal successors, (7896), 21 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states 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 07:45:20,555 INFO L175 Difference]: Start difference. First operand has 109 places, 108 transitions, 1189 flow. Second operand 20 states and 3506 transitions. [2023-11-19 07:45:20,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 312 transitions, 2858 flow [2023-11-19 07:45:20,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 312 transitions, 2747 flow, removed 45 selfloop flow, removed 5 redundant places. [2023-11-19 07:45:20,616 INFO L231 Difference]: Finished difference. Result has 126 places, 144 transitions, 1811 flow [2023-11-19 07:45:20,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1811, PETRI_PLACES=126, PETRI_TRANSITIONS=144} [2023-11-19 07:45:20,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2023-11-19 07:45:20,617 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 144 transitions, 1811 flow [2023-11-19 07:45:20,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.625) internal successors, (2698), 16 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states 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 07:45:20,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:20,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:20,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:20,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:45:20,840 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:20,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash -728412989, now seen corresponding path program 1 times [2023-11-19 07:45:20,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:20,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630088622] [2023-11-19 07:45:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:20,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:21,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:21,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630088622] [2023-11-19 07:45:21,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630088622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:21,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991233476] [2023-11-19 07:45:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:21,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:21,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:21,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:21,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:45:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:21,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:45:21,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:21,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:21,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991233476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:21,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:21,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-19 07:45:21,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548888155] [2023-11-19 07:45:21,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:21,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:45:21,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:45:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:45:21,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 376 [2023-11-19 07:45:21,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 144 transitions, 1811 flow. Second operand has 16 states, 16 states have (on average 169.25) internal successors, (2708), 16 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states 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 07:45:21,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:21,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 376 [2023-11-19 07:45:21,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:23,537 INFO L124 PetriNetUnfolderBase]: 4753/8536 cut-off events. [2023-11-19 07:45:23,538 INFO L125 PetriNetUnfolderBase]: For 21545/21545 co-relation queries the response was YES. [2023-11-19 07:45:23,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29374 conditions, 8536 events. 4753/8536 cut-off events. For 21545/21545 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 48104 event pairs, 905 based on Foata normal form. 102/8414 useless extension candidates. Maximal degree in co-relation 25995. Up to 4230 conditions per place. [2023-11-19 07:45:23,616 INFO L140 encePairwiseOnDemand]: 366/376 looper letters, 166 selfloop transitions, 122 changer transitions 2/291 dead transitions. [2023-11-19 07:45:23,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 291 transitions, 3011 flow [2023-11-19 07:45:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:45:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:45:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3306 transitions. [2023-11-19 07:45:23,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627659574468085 [2023-11-19 07:45:23,623 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3306 transitions. [2023-11-19 07:45:23,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3306 transitions. [2023-11-19 07:45:23,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:23,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3306 transitions. [2023-11-19 07:45:23,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states 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 07:45:23,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 376.0) internal successors, (7520), 20 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states 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 07:45:23,645 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 376.0) internal successors, (7520), 20 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states 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 07:45:23,645 INFO L175 Difference]: Start difference. First operand has 126 places, 144 transitions, 1811 flow. Second operand 19 states and 3306 transitions. [2023-11-19 07:45:23,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 291 transitions, 3011 flow [2023-11-19 07:45:23,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 291 transitions, 2802 flow, removed 72 selfloop flow, removed 5 redundant places. [2023-11-19 07:45:23,751 INFO L231 Difference]: Finished difference. Result has 135 places, 160 transitions, 2018 flow [2023-11-19 07:45:23,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2018, PETRI_PLACES=135, PETRI_TRANSITIONS=160} [2023-11-19 07:45:23,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2023-11-19 07:45:23,752 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 160 transitions, 2018 flow [2023-11-19 07:45:23,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 169.25) internal successors, (2708), 16 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states 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 07:45:23,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:23,753 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:23,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:23,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:45:23,954 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:23,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1032007830, now seen corresponding path program 1 times [2023-11-19 07:45:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154462506] [2023-11-19 07:45:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:23,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:24,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:24,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154462506] [2023-11-19 07:45:24,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154462506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:24,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119742806] [2023-11-19 07:45:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:24,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:24,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:24,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:24,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:45:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:24,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:45:24,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:24,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:24,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119742806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:24,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:24,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-19 07:45:24,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591418847] [2023-11-19 07:45:24,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:24,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:45:24,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:24,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:45:24,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:45:24,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 376 [2023-11-19 07:45:24,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 160 transitions, 2018 flow. Second operand has 20 states, 20 states have (on average 170.1) internal successors, (3402), 20 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states 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 07:45:24,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:24,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 376 [2023-11-19 07:45:24,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:28,026 INFO L124 PetriNetUnfolderBase]: 6679/11974 cut-off events. [2023-11-19 07:45:28,026 INFO L125 PetriNetUnfolderBase]: For 32257/32257 co-relation queries the response was YES. [2023-11-19 07:45:28,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41170 conditions, 11974 events. 6679/11974 cut-off events. For 32257/32257 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 68218 event pairs, 1349 based on Foata normal form. 72/11726 useless extension candidates. Maximal degree in co-relation 37707. Up to 4266 conditions per place. [2023-11-19 07:45:28,102 INFO L140 encePairwiseOnDemand]: 367/376 looper letters, 286 selfloop transitions, 169 changer transitions 2/458 dead transitions. [2023-11-19 07:45:28,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 458 transitions, 4847 flow [2023-11-19 07:45:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 07:45:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-19 07:45:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4420 transitions. [2023-11-19 07:45:28,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702127659574468 [2023-11-19 07:45:28,109 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4420 transitions. [2023-11-19 07:45:28,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4420 transitions. [2023-11-19 07:45:28,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:28,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4420 transitions. [2023-11-19 07:45:28,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 176.8) internal successors, (4420), 25 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states 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 07:45:28,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 376.0) internal successors, (9776), 26 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states 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 07:45:28,134 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 376.0) internal successors, (9776), 26 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states 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 07:45:28,135 INFO L175 Difference]: Start difference. First operand has 135 places, 160 transitions, 2018 flow. Second operand 25 states and 4420 transitions. [2023-11-19 07:45:28,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 458 transitions, 4847 flow [2023-11-19 07:45:28,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 458 transitions, 3998 flow, removed 207 selfloop flow, removed 13 redundant places. [2023-11-19 07:45:28,282 INFO L231 Difference]: Finished difference. Result has 153 places, 240 transitions, 2859 flow [2023-11-19 07:45:28,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2859, PETRI_PLACES=153, PETRI_TRANSITIONS=240} [2023-11-19 07:45:28,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2023-11-19 07:45:28,284 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 240 transitions, 2859 flow [2023-11-19 07:45:28,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 170.1) internal successors, (3402), 20 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states 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 07:45:28,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:28,286 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:28,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:28,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:45:28,508 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:28,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1543715466, now seen corresponding path program 3 times [2023-11-19 07:45:28,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:28,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946120183] [2023-11-19 07:45:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:28,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:45:28,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:28,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946120183] [2023-11-19 07:45:28,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946120183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:28,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209446286] [2023-11-19 07:45:28,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:45:28,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:28,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:28,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:28,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:45:29,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-19 07:45:29,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:29,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:45:29,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:45:29,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:45:29,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209446286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:29,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:29,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-19 07:45:29,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431704599] [2023-11-19 07:45:29,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:29,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:45:29,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:45:29,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:45:29,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 376 [2023-11-19 07:45:29,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 240 transitions, 2859 flow. Second operand has 20 states, 20 states have (on average 169.9) internal successors, (3398), 20 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states 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 07:45:29,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:29,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 376 [2023-11-19 07:45:29,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:34,490 INFO L124 PetriNetUnfolderBase]: 9998/17865 cut-off events. [2023-11-19 07:45:34,490 INFO L125 PetriNetUnfolderBase]: For 43908/43908 co-relation queries the response was YES. [2023-11-19 07:45:34,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59015 conditions, 17865 events. 9998/17865 cut-off events. For 43908/43908 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 106972 event pairs, 2469 based on Foata normal form. 144/17533 useless extension candidates. Maximal degree in co-relation 54909. Up to 4262 conditions per place. [2023-11-19 07:45:34,627 INFO L140 encePairwiseOnDemand]: 367/376 looper letters, 330 selfloop transitions, 302 changer transitions 2/635 dead transitions. [2023-11-19 07:45:34,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 635 transitions, 6762 flow [2023-11-19 07:45:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 07:45:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-19 07:45:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4436 transitions. [2023-11-19 07:45:34,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47191489361702127 [2023-11-19 07:45:34,633 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4436 transitions. [2023-11-19 07:45:34,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4436 transitions. [2023-11-19 07:45:34,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:34,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4436 transitions. [2023-11-19 07:45:34,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 177.44) internal successors, (4436), 25 states have internal predecessors, (4436), 0 states have call successors, (0), 0 states 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 07:45:34,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 376.0) internal successors, (9776), 26 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states 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 07:45:34,652 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 376.0) internal successors, (9776), 26 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states 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 07:45:34,652 INFO L175 Difference]: Start difference. First operand has 153 places, 240 transitions, 2859 flow. Second operand 25 states and 4436 transitions. [2023-11-19 07:45:34,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 635 transitions, 6762 flow [2023-11-19 07:45:34,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 635 transitions, 6468 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-19 07:45:34,989 INFO L231 Difference]: Finished difference. Result has 170 places, 382 transitions, 5155 flow [2023-11-19 07:45:34,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5155, PETRI_PLACES=170, PETRI_TRANSITIONS=382} [2023-11-19 07:45:34,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2023-11-19 07:45:34,992 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 382 transitions, 5155 flow [2023-11-19 07:45:34,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 169.9) internal successors, (3398), 20 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states 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 07:45:34,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:34,993 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1] [2023-11-19 07:45:35,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:35,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:45:35,213 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 07:45:35,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash -428492919, now seen corresponding path program 2 times [2023-11-19 07:45:35,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:35,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379532436] [2023-11-19 07:45:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:35,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:35,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:35,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379532436] [2023-11-19 07:45:35,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379532436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:35,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82365982] [2023-11-19 07:45:35,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:45:35,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:35,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:35,752 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:35,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13250e59-52ca-4bd5-b2f4-b67a00d06396/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:45:36,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:45:36,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:36,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:45:36,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:45:36,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:36,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82365982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:36,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:45:36,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 23 [2023-11-19 07:45:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272109258] [2023-11-19 07:45:36,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:36,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:45:36,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:36,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:45:36,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:45:36,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 376 [2023-11-19 07:45:36,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 382 transitions, 5155 flow. Second operand has 8 states, 8 states have (on average 182.625) internal successors, (1461), 8 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states 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 07:45:36,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:36,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 376 [2023-11-19 07:45:36,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand