./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e7bb482b 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_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:57:21,721 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:57:21,802 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:57:21,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:57:21,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:57:21,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:57:21,837 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:57:21,838 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:57:21,839 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:57:21,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:57:21,845 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:57:21,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:57:21,846 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:57:21,851 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:57:21,852 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:57:21,852 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:57:21,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:57:21,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:57:21,855 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:57:21,855 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:57:21,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:57:21,856 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:57:21,857 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:57:21,857 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:57:21,858 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:57:21,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:57:21,858 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:57:21,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:57:21,860 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:57:21,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:57:21,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:57:21,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:57:21,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:57:21,862 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:57:21,862 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:57:21,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:57:21,863 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:57:21,863 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:57:21,863 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:57:21,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:57:21,863 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:57:21,864 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_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2023-11-06 22:57:22,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:57:22,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:57:22,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:57:22,193 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:57:22,194 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:57:22,195 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-06 22:57:25,335 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:57:25,540 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:57:25,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-06 22:57:25,555 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/data/4043f2939/8fbe6e3f22a8406da2348a5200b1687d/FLAGfa6498c6d [2023-11-06 22:57:25,569 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/data/4043f2939/8fbe6e3f22a8406da2348a5200b1687d [2023-11-06 22:57:25,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:57:25,573 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:57:25,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:57:25,581 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:57:25,596 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:57:25,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:25" (1/1) ... [2023-11-06 22:57:25,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ad9ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:25, skipping insertion in model container [2023-11-06 22:57:25,602 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:25" (1/1) ... [2023-11-06 22:57:25,634 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:57:25,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:57:25,978 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:57:26,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:57:26,016 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:57:26,016 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:57:26,027 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:57:26,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26 WrapperNode [2023-11-06 22:57:26,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:57:26,028 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:57:26,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:57:26,029 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:57:26,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,049 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,078 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 167 [2023-11-06 22:57:26,079 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:57:26,080 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:57:26,080 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:57:26,080 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:57:26,090 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,095 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,110 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,136 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,138 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,140 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,143 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:57:26,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:57:26,148 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:57:26,148 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:57:26,149 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (1/1) ... [2023-11-06 22:57:26,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:57:26,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:26,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:57:26,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:57:26,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:57:26,239 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:57:26,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:57:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:57:26,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:57:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:57:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:57:26,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:57:26,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:57:26,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:57:26,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:57:26,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:57:26,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:57:26,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:57:26,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:57:26,243 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:57:26,415 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:57:26,417 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:57:26,889 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:57:26,967 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:57:26,967 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:57:26,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:26 BoogieIcfgContainer [2023-11-06 22:57:26,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:57:26,978 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:57:26,978 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:57:26,984 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:57:26,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:25" (1/3) ... [2023-11-06 22:57:26,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5b9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:26, skipping insertion in model container [2023-11-06 22:57:26,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:26" (2/3) ... [2023-11-06 22:57:26,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5b9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:26, skipping insertion in model container [2023-11-06 22:57:26,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:26" (3/3) ... [2023-11-06 22:57:26,989 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-11-06 22:57:27,008 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:57:27,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:57:27,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-06 22:57:27,024 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:57:27,135 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:57:27,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 161 transitions, 336 flow [2023-11-06 22:57:27,358 INFO L124 PetriNetUnfolderBase]: 11/159 cut-off events. [2023-11-06 22:57:27,358 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:57:27,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 159 events. 11/159 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 185 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-06 22:57:27,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 161 transitions, 336 flow [2023-11-06 22:57:27,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 137 transitions, 283 flow [2023-11-06 22:57:27,384 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:57:27,403 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 137 transitions, 283 flow [2023-11-06 22:57:27,408 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 137 transitions, 283 flow [2023-11-06 22:57:27,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 137 transitions, 283 flow [2023-11-06 22:57:27,486 INFO L124 PetriNetUnfolderBase]: 10/137 cut-off events. [2023-11-06 22:57:27,486 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:57:27,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 137 events. 10/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 178 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-06 22:57:27,493 INFO L119 LiptonReduction]: Number of co-enabled transitions 2052 [2023-11-06 22:57:35,606 INFO L134 LiptonReduction]: Checked pairs total: 2401 [2023-11-06 22:57:35,606 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-11-06 22:57:35,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:57:35,630 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=LoopsAndPotentialCycles, 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;@264a2682, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:57:35,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-06 22:57:35,634 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:57:35,634 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:57:35,634 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:57:35,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:35,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:57:35,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:35,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:35,642 INFO L85 PathProgramCache]: Analyzing trace with hash 22426, now seen corresponding path program 1 times [2023-11-06 22:57:35,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:35,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229072332] [2023-11-06 22:57:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:35,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:35,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:35,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229072332] [2023-11-06 22:57:35,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229072332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:35,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:57:35,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:57:35,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272543608] [2023-11-06 22:57:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:35,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:57:35,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:35,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:57:35,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:57:36,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-11-06 22:57:36,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:36,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:36,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-11-06 22:57:36,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:36,208 INFO L124 PetriNetUnfolderBase]: 193/292 cut-off events. [2023-11-06 22:57:36,208 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 22:57:36,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 292 events. 193/292 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1038 event pairs, 89 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 523. Up to 285 conditions per place. [2023-11-06 22:57:36,215 INFO L140 encePairwiseOnDemand]: 317/325 looper letters, 20 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-11-06 22:57:36,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 105 flow [2023-11-06 22:57:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:57:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:57:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-11-06 22:57:36,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441025641025641 [2023-11-06 22:57:36,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-11-06 22:57:36,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-11-06 22:57:36,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:36,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-11-06 22:57:36,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:36,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:36,271 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:36,273 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 61 flow. Second operand 3 states and 433 transitions. [2023-11-06 22:57:36,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 105 flow [2023-11-06 22:57:36,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:57:36,279 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 71 flow [2023-11-06 22:57:36,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-11-06 22:57:36,285 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-06 22:57:36,285 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 71 flow [2023-11-06 22:57:36,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:36,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:36,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:57:36,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:57:36,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:36,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash 696782, now seen corresponding path program 1 times [2023-11-06 22:57:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313390175] [2023-11-06 22:57:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:36,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:36,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313390175] [2023-11-06 22:57:36,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313390175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:36,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761375352] [2023-11-06 22:57:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:36,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:36,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:36,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:36,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:57:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:36,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:57:36,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:36,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:36,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761375352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:36,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:36,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:57:36,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906740625] [2023-11-06 22:57:36,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:36,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:57:36,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:57:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:57:36,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-11-06 22:57:36,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 71 flow. Second operand has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:36,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:36,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-11-06 22:57:36,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:36,878 INFO L124 PetriNetUnfolderBase]: 199/301 cut-off events. [2023-11-06 22:57:36,878 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:57:36,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 301 events. 199/301 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1062 event pairs, 89 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 578. Up to 287 conditions per place. [2023-11-06 22:57:36,886 INFO L140 encePairwiseOnDemand]: 320/325 looper letters, 19 selfloop transitions, 13 changer transitions 0/34 dead transitions. [2023-11-06 22:57:36,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 171 flow [2023-11-06 22:57:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:57:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:57:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 980 transitions. [2023-11-06 22:57:36,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-11-06 22:57:36,894 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 980 transitions. [2023-11-06 22:57:36,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 980 transitions. [2023-11-06 22:57:36,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:36,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 980 transitions. [2023-11-06 22:57:36,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:36,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:36,910 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:36,910 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 71 flow. Second operand 7 states and 980 transitions. [2023-11-06 22:57:36,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 171 flow [2023-11-06 22:57:36,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 166 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:57:36,914 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 150 flow [2023-11-06 22:57:36,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2023-11-06 22:57:36,915 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-06 22:57:36,916 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 150 flow [2023-11-06 22:57:36,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:36,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:36,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-06 22:57:36,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:37,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:37,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:37,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:37,126 INFO L85 PathProgramCache]: Analyzing trace with hash 21601402, now seen corresponding path program 1 times [2023-11-06 22:57:37,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:37,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257935763] [2023-11-06 22:57:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:37,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:37,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:37,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257935763] [2023-11-06 22:57:37,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257935763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:37,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244607774] [2023-11-06 22:57:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:37,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:37,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:37,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:57:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:37,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:57:37,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:37,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:57:37,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244607774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:37,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:57:37,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-06 22:57:37,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975729942] [2023-11-06 22:57:37,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:37,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:57:37,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:37,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:57:37,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:57:37,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 325 [2023-11-06 22:57:37,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:37,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:37,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 325 [2023-11-06 22:57:37,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:37,637 INFO L124 PetriNetUnfolderBase]: 196/297 cut-off events. [2023-11-06 22:57:37,637 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:57:37,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 297 events. 196/297 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1067 event pairs, 89 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 604. Up to 284 conditions per place. [2023-11-06 22:57:37,641 INFO L140 encePairwiseOnDemand]: 321/325 looper letters, 20 selfloop transitions, 8 changer transitions 0/30 dead transitions. [2023-11-06 22:57:37,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 179 flow [2023-11-06 22:57:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:57:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:57:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 701 transitions. [2023-11-06 22:57:37,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43138461538461537 [2023-11-06 22:57:37,646 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 701 transitions. [2023-11-06 22:57:37,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 701 transitions. [2023-11-06 22:57:37,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:37,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 701 transitions. [2023-11-06 22:57:37,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:37,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:37,658 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:37,658 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 150 flow. Second operand 5 states and 701 transitions. [2023-11-06 22:57:37,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 179 flow [2023-11-06 22:57:37,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 158 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 22:57:37,662 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 118 flow [2023-11-06 22:57:37,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-11-06 22:57:37,663 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-06 22:57:37,664 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 118 flow [2023-11-06 22:57:37,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:37,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:37,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:57:37,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:37,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:37,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:37,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash 669098439, now seen corresponding path program 1 times [2023-11-06 22:57:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:37,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84957620] [2023-11-06 22:57:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84957620] [2023-11-06 22:57:38,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84957620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:38,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:57:38,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:57:38,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240052299] [2023-11-06 22:57:38,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:38,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:57:38,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:38,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:57:38,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:57:38,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 325 [2023-11-06 22:57:38,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:38,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:38,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 325 [2023-11-06 22:57:38,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:38,311 INFO L124 PetriNetUnfolderBase]: 204/325 cut-off events. [2023-11-06 22:57:38,312 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:57:38,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 325 events. 204/325 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1238 event pairs, 98 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 663. Up to 289 conditions per place. [2023-11-06 22:57:38,315 INFO L140 encePairwiseOnDemand]: 315/325 looper letters, 25 selfloop transitions, 2 changer transitions 9/38 dead transitions. [2023-11-06 22:57:38,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 210 flow [2023-11-06 22:57:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:57:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:57:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 565 transitions. [2023-11-06 22:57:38,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2023-11-06 22:57:38,320 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 565 transitions. [2023-11-06 22:57:38,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 565 transitions. [2023-11-06 22:57:38,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:38,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 565 transitions. [2023-11-06 22:57:38,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:38,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:38,335 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:38,335 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 118 flow. Second operand 4 states and 565 transitions. [2023-11-06 22:57:38,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 210 flow [2023-11-06 22:57:38,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:57:38,348 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 119 flow [2023-11-06 22:57:38,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-06 22:57:38,352 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-11-06 22:57:38,352 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 119 flow [2023-11-06 22:57:38,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:38,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:38,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:57:38,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:57:38,355 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:38,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash -716385728, now seen corresponding path program 1 times [2023-11-06 22:57:38,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:38,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117948938] [2023-11-06 22:57:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:38,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:38,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:38,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117948938] [2023-11-06 22:57:38,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117948938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:38,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:57:38,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:57:38,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925046562] [2023-11-06 22:57:38,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:38,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:57:38,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:38,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:57:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:57:38,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 325 [2023-11-06 22:57:38,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:38,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:38,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 325 [2023-11-06 22:57:38,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:38,787 INFO L124 PetriNetUnfolderBase]: 149/267 cut-off events. [2023-11-06 22:57:38,787 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-06 22:57:38,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 267 events. 149/267 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1027 event pairs, 45 based on Foata normal form. 18/209 useless extension candidates. Maximal degree in co-relation 664. Up to 123 conditions per place. [2023-11-06 22:57:38,791 INFO L140 encePairwiseOnDemand]: 317/325 looper letters, 42 selfloop transitions, 5 changer transitions 3/51 dead transitions. [2023-11-06 22:57:38,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 284 flow [2023-11-06 22:57:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:57:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:57:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 706 transitions. [2023-11-06 22:57:38,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43446153846153845 [2023-11-06 22:57:38,795 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 706 transitions. [2023-11-06 22:57:38,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 706 transitions. [2023-11-06 22:57:38,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:38,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 706 transitions. [2023-11-06 22:57:38,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:38,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:38,805 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 325.0) internal successors, (1950), 6 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:38,805 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 119 flow. Second operand 5 states and 706 transitions. [2023-11-06 22:57:38,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 284 flow [2023-11-06 22:57:38,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:57:38,813 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 171 flow [2023-11-06 22:57:38,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-11-06 22:57:38,816 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-11-06 22:57:38,817 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 171 flow [2023-11-06 22:57:38,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:38,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:38,823 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:57:38,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:57:38,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:38,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:38,825 INFO L85 PathProgramCache]: Analyzing trace with hash -715839129, now seen corresponding path program 2 times [2023-11-06 22:57:38,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:38,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557879205] [2023-11-06 22:57:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:38,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:38,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:38,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557879205] [2023-11-06 22:57:38,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557879205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:38,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755685697] [2023-11-06 22:57:38,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:57:38,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:38,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:38,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:38,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:57:39,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:57:39,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:39,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:57:39,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:57:39,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:57:39,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755685697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:39,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:57:39,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-06 22:57:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113818174] [2023-11-06 22:57:39,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:39,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:57:39,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:57:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:57:39,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 325 [2023-11-06 22:57:39,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:39,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:39,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 325 [2023-11-06 22:57:39,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:39,213 INFO L124 PetriNetUnfolderBase]: 162/271 cut-off events. [2023-11-06 22:57:39,214 INFO L125 PetriNetUnfolderBase]: For 300/333 co-relation queries the response was YES. [2023-11-06 22:57:39,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 271 events. 162/271 cut-off events. For 300/333 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1114 event pairs, 89 based on Foata normal form. 11/204 useless extension candidates. Maximal degree in co-relation 903. Up to 262 conditions per place. [2023-11-06 22:57:39,217 INFO L140 encePairwiseOnDemand]: 322/325 looper letters, 24 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-11-06 22:57:39,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 219 flow [2023-11-06 22:57:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:57:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:57:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-11-06 22:57:39,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442051282051282 [2023-11-06 22:57:39,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-11-06 22:57:39,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-11-06 22:57:39,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:39,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-11-06 22:57:39,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:39,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:39,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:39,225 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 171 flow. Second operand 3 states and 431 transitions. [2023-11-06 22:57:39,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 219 flow [2023-11-06 22:57:39,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 32 transitions, 204 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-06 22:57:39,230 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 156 flow [2023-11-06 22:57:39,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-06 22:57:39,235 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-11-06 22:57:39,235 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 156 flow [2023-11-06 22:57:39,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:39,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:39,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:39,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:57:39,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:39,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:39,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1246875623, now seen corresponding path program 1 times [2023-11-06 22:57:39,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:39,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499785555] [2023-11-06 22:57:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:39,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:39,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:39,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499785555] [2023-11-06 22:57:39,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499785555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:39,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856537550] [2023-11-06 22:57:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:39,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:39,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:39,607 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:39,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:57:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:39,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:57:39,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:39,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:57:39,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856537550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:39,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:57:39,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-06 22:57:39,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353990913] [2023-11-06 22:57:39,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:39,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:57:39,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:57:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:57:39,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 325 [2023-11-06 22:57:39,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:39,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:39,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 325 [2023-11-06 22:57:39,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:39,792 INFO L124 PetriNetUnfolderBase]: 75/132 cut-off events. [2023-11-06 22:57:39,792 INFO L125 PetriNetUnfolderBase]: For 215/222 co-relation queries the response was YES. [2023-11-06 22:57:39,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 132 events. 75/132 cut-off events. For 215/222 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 401 event pairs, 35 based on Foata normal form. 27/139 useless extension candidates. Maximal degree in co-relation 410. Up to 128 conditions per place. [2023-11-06 22:57:39,794 INFO L140 encePairwiseOnDemand]: 321/325 looper letters, 20 selfloop transitions, 1 changer transitions 6/29 dead transitions. [2023-11-06 22:57:39,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 192 flow [2023-11-06 22:57:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:57:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:57:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-11-06 22:57:39,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441025641025641 [2023-11-06 22:57:39,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-11-06 22:57:39,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-11-06 22:57:39,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:39,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-11-06 22:57:39,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:39,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:39,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:39,804 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 156 flow. Second operand 3 states and 433 transitions. [2023-11-06 22:57:39,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 192 flow [2023-11-06 22:57:39,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 178 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:57:39,807 INFO L231 Difference]: Finished difference. Result has 36 places, 23 transitions, 101 flow [2023-11-06 22:57:39,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=36, PETRI_TRANSITIONS=23} [2023-11-06 22:57:39,808 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-06 22:57:39,808 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 23 transitions, 101 flow [2023-11-06 22:57:39,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:39,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:39,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:39,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:40,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:57:40,017 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:40,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:40,018 INFO L85 PathProgramCache]: Analyzing trace with hash 48422329, now seen corresponding path program 1 times [2023-11-06 22:57:40,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:40,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117063724] [2023-11-06 22:57:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:40,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:40,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:40,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117063724] [2023-11-06 22:57:40,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117063724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:40,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396774602] [2023-11-06 22:57:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:40,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:40,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:40,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:40,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:57:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:40,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:57:40,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:57:40,905 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:57:40,975 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:57:41,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:57:41,098 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:57:41,203 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:57:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:41,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:42,950 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:42,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 114 [2023-11-06 22:57:42,989 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:42,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 339 treesize of output 323 [2023-11-06 22:57:43,040 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:43,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 280 [2023-11-06 22:57:43,075 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:43,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 268 [2023-11-06 22:57:43,112 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:43,112 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 244 [2023-11-06 22:57:43,151 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:57:43,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 232 [2023-11-06 22:57:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:46,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396774602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:46,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:46,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-11-06 22:57:46,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021921710] [2023-11-06 22:57:46,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:46,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:57:46,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:57:46,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=233, Unknown=3, NotChecked=0, Total=306 [2023-11-06 22:57:49,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 325 [2023-11-06 22:57:49,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 23 transitions, 101 flow. Second operand has 18 states, 18 states have (on average 86.66666666666667) internal successors, (1560), 18 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:49,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:49,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 325 [2023-11-06 22:57:49,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:50,396 INFO L124 PetriNetUnfolderBase]: 84/162 cut-off events. [2023-11-06 22:57:50,396 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-06 22:57:50,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 162 events. 84/162 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 458 event pairs, 14 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 500. Up to 78 conditions per place. [2023-11-06 22:57:50,398 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 35 selfloop transitions, 16 changer transitions 2/53 dead transitions. [2023-11-06 22:57:50,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 316 flow [2023-11-06 22:57:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:57:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:57:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1160 transitions. [2023-11-06 22:57:50,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27455621301775146 [2023-11-06 22:57:50,406 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1160 transitions. [2023-11-06 22:57:50,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1160 transitions. [2023-11-06 22:57:50,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:50,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1160 transitions. [2023-11-06 22:57:50,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 89.23076923076923) internal successors, (1160), 13 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:50,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 325.0) internal successors, (4550), 14 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:50,422 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 325.0) internal successors, (4550), 14 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:50,422 INFO L175 Difference]: Start difference. First operand has 36 places, 23 transitions, 101 flow. Second operand 13 states and 1160 transitions. [2023-11-06 22:57:50,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 316 flow [2023-11-06 22:57:50,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 53 transitions, 277 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-11-06 22:57:50,425 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 165 flow [2023-11-06 22:57:50,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=165, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-11-06 22:57:50,428 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-11-06 22:57:50,429 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 165 flow [2023-11-06 22:57:50,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.66666666666667) internal successors, (1560), 18 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:50,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:50,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:50,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:50,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:50,639 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:50,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:50,639 INFO L85 PathProgramCache]: Analyzing trace with hash -710765547, now seen corresponding path program 1 times [2023-11-06 22:57:50,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:50,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965015599] [2023-11-06 22:57:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:50,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:50,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:50,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965015599] [2023-11-06 22:57:50,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965015599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:50,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436829470] [2023-11-06 22:57:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:50,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:50,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:50,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:50,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:57:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:50,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:57:50,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:50,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:51,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436829470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:51,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:51,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-06 22:57:51,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786180709] [2023-11-06 22:57:51,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:51,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:57:51,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:51,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:57:51,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:57:51,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 325 [2023-11-06 22:57:51,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 165 flow. Second operand has 15 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:51,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:51,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 325 [2023-11-06 22:57:51,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:51,586 INFO L124 PetriNetUnfolderBase]: 78/155 cut-off events. [2023-11-06 22:57:51,586 INFO L125 PetriNetUnfolderBase]: For 118/120 co-relation queries the response was YES. [2023-11-06 22:57:51,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 155 events. 78/155 cut-off events. For 118/120 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 479 event pairs, 29 based on Foata normal form. 8/145 useless extension candidates. Maximal degree in co-relation 482. Up to 106 conditions per place. [2023-11-06 22:57:51,588 INFO L140 encePairwiseOnDemand]: 318/325 looper letters, 22 selfloop transitions, 3 changer transitions 17/44 dead transitions. [2023-11-06 22:57:51,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 294 flow [2023-11-06 22:57:51,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:57:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:57:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 922 transitions. [2023-11-06 22:57:51,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052747252747253 [2023-11-06 22:57:51,595 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 922 transitions. [2023-11-06 22:57:51,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 922 transitions. [2023-11-06 22:57:51,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:51,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 922 transitions. [2023-11-06 22:57:51,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:51,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:51,607 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:51,607 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 165 flow. Second operand 7 states and 922 transitions. [2023-11-06 22:57:51,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 294 flow [2023-11-06 22:57:51,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 283 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:57:51,610 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 145 flow [2023-11-06 22:57:51,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=145, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-11-06 22:57:51,612 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2023-11-06 22:57:51,613 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 145 flow [2023-11-06 22:57:51,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:51,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:51,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:51,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:51,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:57:51,822 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:51,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:51,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1217392418, now seen corresponding path program 1 times [2023-11-06 22:57:51,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:51,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803137227] [2023-11-06 22:57:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:51,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:52,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803137227] [2023-11-06 22:57:52,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803137227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754652632] [2023-11-06 22:57:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:52,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:52,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:52,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:52,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:57:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:52,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:57:52,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:57:53,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:57:53,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754652632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:57:53,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:57:53,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-11-06 22:57:53,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291175495] [2023-11-06 22:57:53,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:57:53,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:57:53,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:57:53,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:57:53,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 325 [2023-11-06 22:57:53,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 145 flow. Second operand has 6 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:53,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:53,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 325 [2023-11-06 22:57:53,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:53,573 INFO L124 PetriNetUnfolderBase]: 132/233 cut-off events. [2023-11-06 22:57:53,574 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-11-06 22:57:53,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795 conditions, 233 events. 132/233 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 724 event pairs, 8 based on Foata normal form. 8/237 useless extension candidates. Maximal degree in co-relation 775. Up to 111 conditions per place. [2023-11-06 22:57:53,578 INFO L140 encePairwiseOnDemand]: 318/325 looper letters, 35 selfloop transitions, 14 changer transitions 1/50 dead transitions. [2023-11-06 22:57:53,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 347 flow [2023-11-06 22:57:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:57:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:57:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 900 transitions. [2023-11-06 22:57:53,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956043956043956 [2023-11-06 22:57:53,585 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 900 transitions. [2023-11-06 22:57:53,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 900 transitions. [2023-11-06 22:57:53,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:53,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 900 transitions. [2023-11-06 22:57:53,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.57142857142858) internal successors, (900), 7 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:53,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:53,599 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 325.0) internal successors, (2600), 8 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:53,599 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 145 flow. Second operand 7 states and 900 transitions. [2023-11-06 22:57:53,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 347 flow [2023-11-06 22:57:53,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 311 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-11-06 22:57:53,604 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 244 flow [2023-11-06 22:57:53,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=244, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-06 22:57:53,605 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-11-06 22:57:53,605 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 244 flow [2023-11-06 22:57:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:53,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:53,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:53,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:53,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:57:53,820 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:57:53,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:53,821 INFO L85 PathProgramCache]: Analyzing trace with hash 915733605, now seen corresponding path program 2 times [2023-11-06 22:57:53,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:53,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321472733] [2023-11-06 22:57:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:53,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:54,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:54,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321472733] [2023-11-06 22:57:54,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321472733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:54,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703047788] [2023-11-06 22:57:54,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:57:54,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:54,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:54,849 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:54,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:57:54,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:57:54,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:54,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:57:55,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:55,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:55,999 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-11-06 22:57:55,999 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 161 [2023-11-06 22:57:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:57,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703047788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:57,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:57,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-11-06 22:57:57,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465885232] [2023-11-06 22:57:57,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:57,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:57:57,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:57,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:57:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:58:00,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 325 [2023-11-06 22:58:00,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 244 flow. Second operand has 25 states, 25 states have (on average 110.44) internal successors, (2761), 25 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:00,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:00,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 325 [2023-11-06 22:58:00,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:02,142 INFO L124 PetriNetUnfolderBase]: 387/643 cut-off events. [2023-11-06 22:58:02,142 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-11-06 22:58:02,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 643 events. 387/643 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2580 event pairs, 22 based on Foata normal form. 30/673 useless extension candidates. Maximal degree in co-relation 2319. Up to 255 conditions per place. [2023-11-06 22:58:02,151 INFO L140 encePairwiseOnDemand]: 314/325 looper letters, 61 selfloop transitions, 59 changer transitions 1/121 dead transitions. [2023-11-06 22:58:02,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 121 transitions, 932 flow [2023-11-06 22:58:02,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:58:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:58:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2283 transitions. [2023-11-06 22:58:02,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35123076923076924 [2023-11-06 22:58:02,163 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2283 transitions. [2023-11-06 22:58:02,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2283 transitions. [2023-11-06 22:58:02,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:02,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2283 transitions. [2023-11-06 22:58:02,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 114.15) internal successors, (2283), 20 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:02,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 325.0) internal successors, (6825), 21 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:02,190 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 325.0) internal successors, (6825), 21 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:02,191 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 244 flow. Second operand 20 states and 2283 transitions. [2023-11-06 22:58:02,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 121 transitions, 932 flow [2023-11-06 22:58:02,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 121 transitions, 906 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-06 22:58:02,198 INFO L231 Difference]: Finished difference. Result has 68 places, 83 transitions, 761 flow [2023-11-06 22:58:02,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=761, PETRI_PLACES=68, PETRI_TRANSITIONS=83} [2023-11-06 22:58:02,199 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2023-11-06 22:58:02,199 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 83 transitions, 761 flow [2023-11-06 22:58:02,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 110.44) internal successors, (2761), 25 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:02,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:02,202 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:02,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:02,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:58:02,408 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:58:02,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:02,408 INFO L85 PathProgramCache]: Analyzing trace with hash -130893495, now seen corresponding path program 2 times [2023-11-06 22:58:02,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:02,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493802752] [2023-11-06 22:58:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:02,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:03,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:03,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493802752] [2023-11-06 22:58:03,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493802752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:03,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026154569] [2023-11-06 22:58:03,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:58:03,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:03,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:03,962 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:03,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:58:04,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:04,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:04,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:58:04,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:58:04,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:04,566 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:58:04,567 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 106 [2023-11-06 22:58:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:58:05,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026154569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:05,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:05,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 19 [2023-11-06 22:58:05,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616040144] [2023-11-06 22:58:05,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:05,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:58:05,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:05,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:58:05,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:58:06,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 325 [2023-11-06 22:58:06,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 83 transitions, 761 flow. Second operand has 21 states, 21 states have (on average 112.80952380952381) internal successors, (2369), 21 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:06,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:06,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 325 [2023-11-06 22:58:06,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:07,683 INFO L124 PetriNetUnfolderBase]: 573/971 cut-off events. [2023-11-06 22:58:07,683 INFO L125 PetriNetUnfolderBase]: For 3258/3258 co-relation queries the response was YES. [2023-11-06 22:58:07,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4350 conditions, 971 events. 573/971 cut-off events. For 3258/3258 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4429 event pairs, 34 based on Foata normal form. 76/1047 useless extension candidates. Maximal degree in co-relation 4323. Up to 361 conditions per place. [2023-11-06 22:58:07,699 INFO L140 encePairwiseOnDemand]: 315/325 looper letters, 91 selfloop transitions, 76 changer transitions 2/169 dead transitions. [2023-11-06 22:58:07,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 169 transitions, 1674 flow [2023-11-06 22:58:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:58:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:58:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2778 transitions. [2023-11-06 22:58:07,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35615384615384615 [2023-11-06 22:58:07,714 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2778 transitions. [2023-11-06 22:58:07,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2778 transitions. [2023-11-06 22:58:07,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:07,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2778 transitions. [2023-11-06 22:58:07,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 115.75) internal successors, (2778), 24 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:07,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 325.0) internal successors, (8125), 25 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:07,767 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 325.0) internal successors, (8125), 25 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:07,767 INFO L175 Difference]: Start difference. First operand has 68 places, 83 transitions, 761 flow. Second operand 24 states and 2778 transitions. [2023-11-06 22:58:07,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 169 transitions, 1674 flow [2023-11-06 22:58:07,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 169 transitions, 1493 flow, removed 78 selfloop flow, removed 7 redundant places. [2023-11-06 22:58:07,787 INFO L231 Difference]: Finished difference. Result has 90 places, 116 transitions, 1192 flow [2023-11-06 22:58:07,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1192, PETRI_PLACES=90, PETRI_TRANSITIONS=116} [2023-11-06 22:58:07,788 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2023-11-06 22:58:07,788 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 116 transitions, 1192 flow [2023-11-06 22:58:07,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 112.80952380952381) internal successors, (2369), 21 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:07,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:07,790 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:07,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:07,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:07,996 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:58:07,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1757200139, now seen corresponding path program 2 times [2023-11-06 22:58:07,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:07,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334384398] [2023-11-06 22:58:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:58:08,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:08,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334384398] [2023-11-06 22:58:08,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334384398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:08,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18060243] [2023-11-06 22:58:08,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:58:08,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:08,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:08,187 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:08,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:58:08,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:08,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:08,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-06 22:58:08,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:08,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:58:08,376 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:58:08,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2023-11-06 22:58:08,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:58:08,585 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:58:08,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:58:08,666 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 22:58:08,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 22:58:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:09,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:10,006 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:58:10,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 80 [2023-11-06 22:58:10,076 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:58:10,076 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 419 treesize of output 424 [2023-11-06 22:58:10,133 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:58:10,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 106 [2023-11-06 22:58:10,168 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:58:10,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 93 [2023-11-06 22:58:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:14,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18060243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:14,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:14,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 10, 10] total 23 [2023-11-06 22:58:14,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414706253] [2023-11-06 22:58:14,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:14,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:58:14,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:58:14,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=505, Unknown=2, NotChecked=0, Total=600 [2023-11-06 22:58:17,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 325 [2023-11-06 22:58:17,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 116 transitions, 1192 flow. Second operand has 25 states, 25 states have (on average 82.6) internal successors, (2065), 25 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:17,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:17,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 325 [2023-11-06 22:58:17,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:21,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:58:25,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:58:25,448 INFO L124 PetriNetUnfolderBase]: 675/1167 cut-off events. [2023-11-06 22:58:25,448 INFO L125 PetriNetUnfolderBase]: For 7269/7269 co-relation queries the response was YES. [2023-11-06 22:58:25,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5386 conditions, 1167 events. 675/1167 cut-off events. For 7269/7269 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5510 event pairs, 42 based on Foata normal form. 128/1295 useless extension candidates. Maximal degree in co-relation 5355. Up to 349 conditions per place. [2023-11-06 22:58:25,464 INFO L140 encePairwiseOnDemand]: 315/325 looper letters, 126 selfloop transitions, 97 changer transitions 39/262 dead transitions. [2023-11-06 22:58:25,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 262 transitions, 2683 flow [2023-11-06 22:58:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 22:58:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-06 22:58:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3340 transitions. [2023-11-06 22:58:25,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26351084812623277 [2023-11-06 22:58:25,477 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3340 transitions. [2023-11-06 22:58:25,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3340 transitions. [2023-11-06 22:58:25,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:25,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3340 transitions. [2023-11-06 22:58:25,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 85.64102564102564) internal successors, (3340), 39 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:25,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 325.0) internal successors, (13000), 40 states have internal predecessors, (13000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:25,512 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 325.0) internal successors, (13000), 40 states have internal predecessors, (13000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:25,512 INFO L175 Difference]: Start difference. First operand has 90 places, 116 transitions, 1192 flow. Second operand 39 states and 3340 transitions. [2023-11-06 22:58:25,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 262 transitions, 2683 flow [2023-11-06 22:58:25,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 262 transitions, 2445 flow, removed 72 selfloop flow, removed 11 redundant places. [2023-11-06 22:58:25,544 INFO L231 Difference]: Finished difference. Result has 131 places, 138 transitions, 1581 flow [2023-11-06 22:58:25,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1581, PETRI_PLACES=131, PETRI_TRANSITIONS=138} [2023-11-06 22:58:25,545 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2023-11-06 22:58:25,545 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 138 transitions, 1581 flow [2023-11-06 22:58:25,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.6) internal successors, (2065), 25 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:25,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:25,546 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:25,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:25,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:25,752 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:58:25,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1848366638, now seen corresponding path program 1 times [2023-11-06 22:58:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:25,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612536981] [2023-11-06 22:58:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:25,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:26,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:26,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612536981] [2023-11-06 22:58:26,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612536981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:26,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498995052] [2023-11-06 22:58:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:26,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:26,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:26,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:26,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:58:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:26,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:58:26,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:26,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:27,173 INFO L322 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-11-06 22:58:27,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 149 [2023-11-06 22:58:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:27,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498995052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:27,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:27,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-11-06 22:58:27,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601211599] [2023-11-06 22:58:27,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:27,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:58:27,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:58:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:58:27,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 325 [2023-11-06 22:58:27,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 138 transitions, 1581 flow. Second operand has 19 states, 19 states have (on average 120.73684210526316) internal successors, (2294), 19 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:27,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:27,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 325 [2023-11-06 22:58:27,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:28,293 INFO L124 PetriNetUnfolderBase]: 560/978 cut-off events. [2023-11-06 22:58:28,293 INFO L125 PetriNetUnfolderBase]: For 10465/10487 co-relation queries the response was YES. [2023-11-06 22:58:28,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 978 events. 560/978 cut-off events. For 10465/10487 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4582 event pairs, 247 based on Foata normal form. 12/958 useless extension candidates. Maximal degree in co-relation 5677. Up to 833 conditions per place. [2023-11-06 22:58:28,311 INFO L140 encePairwiseOnDemand]: 320/325 looper letters, 128 selfloop transitions, 10 changer transitions 2/146 dead transitions. [2023-11-06 22:58:28,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 146 transitions, 1929 flow [2023-11-06 22:58:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:58:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:58:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1108 transitions. [2023-11-06 22:58:28,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3788034188034188 [2023-11-06 22:58:28,318 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1108 transitions. [2023-11-06 22:58:28,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1108 transitions. [2023-11-06 22:58:28,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:28,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1108 transitions. [2023-11-06 22:58:28,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 123.11111111111111) internal successors, (1108), 9 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:28,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:28,331 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 325.0) internal successors, (3250), 10 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:28,331 INFO L175 Difference]: Start difference. First operand has 131 places, 138 transitions, 1581 flow. Second operand 9 states and 1108 transitions. [2023-11-06 22:58:28,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 146 transitions, 1929 flow [2023-11-06 22:58:28,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 146 transitions, 1634 flow, removed 131 selfloop flow, removed 15 redundant places. [2023-11-06 22:58:28,377 INFO L231 Difference]: Finished difference. Result has 116 places, 132 transitions, 1289 flow [2023-11-06 22:58:28,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1289, PETRI_PLACES=116, PETRI_TRANSITIONS=132} [2023-11-06 22:58:28,378 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2023-11-06 22:58:28,378 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 132 transitions, 1289 flow [2023-11-06 22:58:28,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 120.73684210526316) internal successors, (2294), 19 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:28,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:28,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:28,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:58:28,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:28,585 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:58:28,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash -448282811, now seen corresponding path program 2 times [2023-11-06 22:58:28,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:28,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228890969] [2023-11-06 22:58:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:28,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:29,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228890969] [2023-11-06 22:58:29,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228890969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289768265] [2023-11-06 22:58:29,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:58:29,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:29,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:29,629 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:29,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:58:29,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:29,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:29,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 22:58:29,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:58:29,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:58:29,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:58:30,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:58:30,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:58:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:30,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:31,599 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:58:31,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2023-11-06 22:58:31,654 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-06 22:58:31,654 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 266 treesize of output 258 [2023-11-06 22:58:31,698 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-06 22:58:31,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 206 [2023-11-06 22:58:31,752 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-06 22:58:31,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 153 [2023-11-06 22:58:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:33,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289768265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:33,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:33,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-11-06 22:58:33,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411841084] [2023-11-06 22:58:33,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:33,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:58:33,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:33,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:58:33,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=720, Unknown=1, NotChecked=0, Total=930 [2023-11-06 22:58:36,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 325 [2023-11-06 22:58:36,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 132 transitions, 1289 flow. Second operand has 31 states, 31 states have (on average 82.35483870967742) internal successors, (2553), 31 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:36,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:36,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 325 [2023-11-06 22:58:36,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:39,645 INFO L124 PetriNetUnfolderBase]: 733/1273 cut-off events. [2023-11-06 22:58:39,645 INFO L125 PetriNetUnfolderBase]: For 6832/6832 co-relation queries the response was YES. [2023-11-06 22:58:39,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6320 conditions, 1273 events. 733/1273 cut-off events. For 6832/6832 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6202 event pairs, 121 based on Foata normal form. 32/1305 useless extension candidates. Maximal degree in co-relation 6281. Up to 786 conditions per place. [2023-11-06 22:58:39,664 INFO L140 encePairwiseOnDemand]: 315/325 looper letters, 136 selfloop transitions, 70 changer transitions 5/211 dead transitions. [2023-11-06 22:58:39,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 211 transitions, 2243 flow [2023-11-06 22:58:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:58:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:58:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2458 transitions. [2023-11-06 22:58:39,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2607957559681698 [2023-11-06 22:58:39,674 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2458 transitions. [2023-11-06 22:58:39,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2458 transitions. [2023-11-06 22:58:39,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:39,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2458 transitions. [2023-11-06 22:58:39,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 84.75862068965517) internal successors, (2458), 29 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:39,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 325.0) internal successors, (9750), 30 states have internal predecessors, (9750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:39,699 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 325.0) internal successors, (9750), 30 states have internal predecessors, (9750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:39,699 INFO L175 Difference]: Start difference. First operand has 116 places, 132 transitions, 1289 flow. Second operand 29 states and 2458 transitions. [2023-11-06 22:58:39,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 211 transitions, 2243 flow [2023-11-06 22:58:39,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 211 transitions, 2226 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 22:58:39,731 INFO L231 Difference]: Finished difference. Result has 142 places, 158 transitions, 1789 flow [2023-11-06 22:58:39,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1789, PETRI_PLACES=142, PETRI_TRANSITIONS=158} [2023-11-06 22:58:39,733 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2023-11-06 22:58:39,733 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 158 transitions, 1789 flow [2023-11-06 22:58:39,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 82.35483870967742) internal successors, (2553), 31 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:39,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:39,734 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:39,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:39,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:39,940 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:58:39,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:39,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1361363490, now seen corresponding path program 3 times [2023-11-06 22:58:39,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:39,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564280939] [2023-11-06 22:58:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:40,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:40,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564280939] [2023-11-06 22:58:40,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564280939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:40,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819842071] [2023-11-06 22:58:40,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:58:40,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:40,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:40,897 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:40,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:58:41,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:58:41,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:41,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:58:41,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:58:41,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:41,822 INFO L322 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-06 22:58:41,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 193 treesize of output 172 [2023-11-06 22:58:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:58:42,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819842071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:42,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:42,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2023-11-06 22:58:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080925146] [2023-11-06 22:58:42,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:42,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:58:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:58:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:58:43,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 325 [2023-11-06 22:58:43,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 158 transitions, 1789 flow. Second operand has 21 states, 21 states have (on average 113.95238095238095) internal successors, (2393), 21 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:43,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:43,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 325 [2023-11-06 22:58:43,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:44,504 INFO L124 PetriNetUnfolderBase]: 1403/2355 cut-off events. [2023-11-06 22:58:44,504 INFO L125 PetriNetUnfolderBase]: For 15820/15820 co-relation queries the response was YES. [2023-11-06 22:58:44,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12774 conditions, 2355 events. 1403/2355 cut-off events. For 15820/15820 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12809 event pairs, 126 based on Foata normal form. 56/2411 useless extension candidates. Maximal degree in co-relation 12730. Up to 869 conditions per place. [2023-11-06 22:58:44,541 INFO L140 encePairwiseOnDemand]: 317/325 looper letters, 157 selfloop transitions, 157 changer transitions 4/318 dead transitions. [2023-11-06 22:58:44,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 318 transitions, 4079 flow [2023-11-06 22:58:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:58:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:58:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2456 transitions. [2023-11-06 22:58:44,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598534798534799 [2023-11-06 22:58:44,549 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2456 transitions. [2023-11-06 22:58:44,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2456 transitions. [2023-11-06 22:58:44,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:44,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2456 transitions. [2023-11-06 22:58:44,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 116.95238095238095) internal successors, (2456), 21 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:44,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:44,566 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:44,566 INFO L175 Difference]: Start difference. First operand has 142 places, 158 transitions, 1789 flow. Second operand 21 states and 2456 transitions. [2023-11-06 22:58:44,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 318 transitions, 4079 flow [2023-11-06 22:58:44,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 318 transitions, 3955 flow, removed 35 selfloop flow, removed 14 redundant places. [2023-11-06 22:58:44,647 INFO L231 Difference]: Finished difference. Result has 155 places, 251 transitions, 3379 flow [2023-11-06 22:58:44,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3379, PETRI_PLACES=155, PETRI_TRANSITIONS=251} [2023-11-06 22:58:44,648 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2023-11-06 22:58:44,649 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 251 transitions, 3379 flow [2023-11-06 22:58:44,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.95238095238095) internal successors, (2393), 21 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:44,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:44,650 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:44,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:44,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:58:44,856 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:58:44,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1942625815, now seen corresponding path program 3 times [2023-11-06 22:58:44,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:44,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751117528] [2023-11-06 22:58:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:44,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:46,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:46,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751117528] [2023-11-06 22:58:46,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751117528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:46,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397318421] [2023-11-06 22:58:46,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:58:46,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:46,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:46,249 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:46,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:58:46,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:58:46,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:46,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:58:46,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:58:46,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:46,966 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-11-06 22:58:46,967 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 161 [2023-11-06 22:58:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:58:47,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397318421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:47,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:47,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 22 [2023-11-06 22:58:47,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759775799] [2023-11-06 22:58:47,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:47,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:58:47,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:47,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:58:47,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:58:49,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 325 [2023-11-06 22:58:49,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 251 transitions, 3379 flow. Second operand has 24 states, 24 states have (on average 112.66666666666667) internal successors, (2704), 24 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:49,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:49,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 325 [2023-11-06 22:58:49,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:51,028 INFO L124 PetriNetUnfolderBase]: 1395/2363 cut-off events. [2023-11-06 22:58:51,028 INFO L125 PetriNetUnfolderBase]: For 20878/20878 co-relation queries the response was YES. [2023-11-06 22:58:51,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14090 conditions, 2363 events. 1395/2363 cut-off events. For 20878/20878 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13031 event pairs, 116 based on Foata normal form. 36/2399 useless extension candidates. Maximal degree in co-relation 14039. Up to 1105 conditions per place. [2023-11-06 22:58:51,062 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 173 selfloop transitions, 127 changer transitions 4/304 dead transitions. [2023-11-06 22:58:51,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 304 transitions, 4392 flow [2023-11-06 22:58:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:58:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:58:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2417 transitions. [2023-11-06 22:58:51,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35413919413919415 [2023-11-06 22:58:51,068 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2417 transitions. [2023-11-06 22:58:51,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2417 transitions. [2023-11-06 22:58:51,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:51,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2417 transitions. [2023-11-06 22:58:51,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 115.0952380952381) internal successors, (2417), 21 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:51,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:51,083 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 325.0) internal successors, (7150), 22 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:51,084 INFO L175 Difference]: Start difference. First operand has 155 places, 251 transitions, 3379 flow. Second operand 21 states and 2417 transitions. [2023-11-06 22:58:51,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 304 transitions, 4392 flow [2023-11-06 22:58:51,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 304 transitions, 4136 flow, removed 96 selfloop flow, removed 10 redundant places. [2023-11-06 22:58:51,215 INFO L231 Difference]: Finished difference. Result has 167 places, 248 transitions, 3393 flow [2023-11-06 22:58:51,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=3018, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3393, PETRI_PLACES=167, PETRI_TRANSITIONS=248} [2023-11-06 22:58:51,216 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2023-11-06 22:58:51,216 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 248 transitions, 3393 flow [2023-11-06 22:58:51,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 112.66666666666667) internal successors, (2704), 24 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:51,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:51,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:51,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:51,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:58:51,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:58:51,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:51,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1303035231, now seen corresponding path program 3 times [2023-11-06 22:58:51,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:51,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485020853] [2023-11-06 22:58:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:51,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:51,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:51,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485020853] [2023-11-06 22:58:51,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485020853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:51,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333926468] [2023-11-06 22:58:51,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:58:51,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:51,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:51,642 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:51,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:58:51,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:58:51,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:51,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:58:51,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:51,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:52,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333926468] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:52,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:52,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 22:58:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590909321] [2023-11-06 22:58:52,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:52,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:58:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:58:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:58:52,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 325 [2023-11-06 22:58:52,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 248 transitions, 3393 flow. Second operand has 21 states, 21 states have (on average 128.47619047619048) internal successors, (2698), 21 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) [2023-11-06 22:58:52,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:52,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 325 [2023-11-06 22:58:52,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:53,174 INFO L124 PetriNetUnfolderBase]: 1258/2140 cut-off events. [2023-11-06 22:58:53,174 INFO L125 PetriNetUnfolderBase]: For 21730/21759 co-relation queries the response was YES. [2023-11-06 22:58:53,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13192 conditions, 2140 events. 1258/2140 cut-off events. For 21730/21759 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 11979 event pairs, 601 based on Foata normal form. 16/2099 useless extension candidates. Maximal degree in co-relation 13141. Up to 1986 conditions per place. [2023-11-06 22:58:53,209 INFO L140 encePairwiseOnDemand]: 319/325 looper letters, 212 selfloop transitions, 4 changer transitions 28/255 dead transitions. [2023-11-06 22:58:53,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 255 transitions, 3862 flow [2023-11-06 22:58:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:58:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:58:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1308 transitions. [2023-11-06 22:58:53,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024615384615385 [2023-11-06 22:58:53,212 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1308 transitions. [2023-11-06 22:58:53,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1308 transitions. [2023-11-06 22:58:53,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:53,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1308 transitions. [2023-11-06 22:58:53,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 130.8) internal successors, (1308), 10 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:53,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:53,220 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 325.0) internal successors, (3575), 11 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:53,221 INFO L175 Difference]: Start difference. First operand has 167 places, 248 transitions, 3393 flow. Second operand 10 states and 1308 transitions. [2023-11-06 22:58:53,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 255 transitions, 3862 flow [2023-11-06 22:58:53,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 255 transitions, 3639 flow, removed 19 selfloop flow, removed 15 redundant places. [2023-11-06 22:58:53,328 INFO L231 Difference]: Finished difference. Result has 162 places, 227 transitions, 2953 flow [2023-11-06 22:58:53,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2953, PETRI_PLACES=162, PETRI_TRANSITIONS=227} [2023-11-06 22:58:53,330 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2023-11-06 22:58:53,330 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 227 transitions, 2953 flow [2023-11-06 22:58:53,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 128.47619047619048) internal successors, (2698), 21 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) [2023-11-06 22:58:53,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:53,331 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:53,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:53,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:58:53,537 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:58:53,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash 741059641, now seen corresponding path program 4 times [2023-11-06 22:58:53,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:53,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435622777] [2023-11-06 22:58:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:53,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:56,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:56,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435622777] [2023-11-06 22:58:56,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435622777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:56,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968434372] [2023-11-06 22:58:56,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:58:56,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:56,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:56,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:57,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:58:57,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:58:57,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:57,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:58:57,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:58:57,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:58,641 INFO L322 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-06 22:58:58,641 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 205 treesize of output 184 [2023-11-06 22:58:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:58:59,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968434372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:59,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:59,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 5] total 29 [2023-11-06 22:58:59,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121703531] [2023-11-06 22:58:59,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:59,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:58:59,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:59,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:58:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:59:03,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 325 [2023-11-06 22:59:03,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 227 transitions, 2953 flow. Second operand has 31 states, 31 states have (on average 105.54838709677419) internal successors, (3272), 31 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:03,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:03,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 325 [2023-11-06 22:59:03,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:07,341 INFO L124 PetriNetUnfolderBase]: 2271/3752 cut-off events. [2023-11-06 22:59:07,341 INFO L125 PetriNetUnfolderBase]: For 40960/40960 co-relation queries the response was YES. [2023-11-06 22:59:07,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22619 conditions, 3752 events. 2271/3752 cut-off events. For 40960/40960 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22179 event pairs, 146 based on Foata normal form. 40/3792 useless extension candidates. Maximal degree in co-relation 22568. Up to 1289 conditions per place. [2023-11-06 22:59:07,389 INFO L140 encePairwiseOnDemand]: 315/325 looper letters, 197 selfloop transitions, 306 changer transitions 6/509 dead transitions. [2023-11-06 22:59:07,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 509 transitions, 7141 flow [2023-11-06 22:59:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 22:59:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 22:59:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4108 transitions. [2023-11-06 22:59:07,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33263157894736844 [2023-11-06 22:59:07,398 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4108 transitions. [2023-11-06 22:59:07,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4108 transitions. [2023-11-06 22:59:07,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:07,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4108 transitions. [2023-11-06 22:59:07,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 108.10526315789474) internal successors, (4108), 38 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 325.0) internal successors, (12675), 39 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,422 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 325.0) internal successors, (12675), 39 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,422 INFO L175 Difference]: Start difference. First operand has 162 places, 227 transitions, 2953 flow. Second operand 38 states and 4108 transitions. [2023-11-06 22:59:07,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 509 transitions, 7141 flow [2023-11-06 22:59:07,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 509 transitions, 6860 flow, removed 67 selfloop flow, removed 18 redundant places. [2023-11-06 22:59:07,619 INFO L231 Difference]: Finished difference. Result has 179 places, 423 transitions, 6599 flow [2023-11-06 22:59:07,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6599, PETRI_PLACES=179, PETRI_TRANSITIONS=423} [2023-11-06 22:59:07,620 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2023-11-06 22:59:07,620 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 423 transitions, 6599 flow [2023-11-06 22:59:07,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 105.54838709677419) internal successors, (3272), 31 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:07,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:07,621 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:07,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:07,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:07,827 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:59:07,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash -906724311, now seen corresponding path program 5 times [2023-11-06 22:59:07,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:07,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713475789] [2023-11-06 22:59:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:07,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:09,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:09,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713475789] [2023-11-06 22:59:09,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713475789] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:09,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271722610] [2023-11-06 22:59:09,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:59:09,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:09,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:09,875 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:09,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:59:10,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:59:10,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:10,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:59:10,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:10,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:11,906 INFO L322 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-11-06 22:59:11,906 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 219 treesize of output 190 [2023-11-06 22:59:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:59:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271722610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:12,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 33 [2023-11-06 22:59:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848909690] [2023-11-06 22:59:12,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:59:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:59:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:59:17,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 325 [2023-11-06 22:59:17,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 423 transitions, 6599 flow. Second operand has 35 states, 35 states have (on average 104.48571428571428) internal successors, (3657), 35 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:17,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:17,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 325 [2023-11-06 22:59:17,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:20,938 INFO L124 PetriNetUnfolderBase]: 2585/4238 cut-off events. [2023-11-06 22:59:20,938 INFO L125 PetriNetUnfolderBase]: For 62037/62037 co-relation queries the response was YES. [2023-11-06 22:59:20,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29324 conditions, 4238 events. 2585/4238 cut-off events. For 62037/62037 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 25301 event pairs, 246 based on Foata normal form. 20/4258 useless extension candidates. Maximal degree in co-relation 29264. Up to 1255 conditions per place. [2023-11-06 22:59:20,990 INFO L140 encePairwiseOnDemand]: 315/325 looper letters, 265 selfloop transitions, 298 changer transitions 4/567 dead transitions. [2023-11-06 22:59:20,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 567 transitions, 9398 flow [2023-11-06 22:59:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:59:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:59:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3008 transitions. [2023-11-06 22:59:20,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33054945054945056 [2023-11-06 22:59:20,997 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3008 transitions. [2023-11-06 22:59:20,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3008 transitions. [2023-11-06 22:59:20,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:20,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3008 transitions. [2023-11-06 22:59:21,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 107.42857142857143) internal successors, (3008), 28 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) [2023-11-06 22:59:21,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 325.0) internal successors, (9425), 29 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:21,015 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 325.0) internal successors, (9425), 29 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:21,015 INFO L175 Difference]: Start difference. First operand has 179 places, 423 transitions, 6599 flow. Second operand 28 states and 3008 transitions. [2023-11-06 22:59:21,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 567 transitions, 9398 flow [2023-11-06 22:59:21,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 567 transitions, 8717 flow, removed 333 selfloop flow, removed 6 redundant places. [2023-11-06 22:59:21,569 INFO L231 Difference]: Finished difference. Result has 205 places, 474 transitions, 7692 flow [2023-11-06 22:59:21,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7692, PETRI_PLACES=205, PETRI_TRANSITIONS=474} [2023-11-06 22:59:21,570 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2023-11-06 22:59:21,570 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 474 transitions, 7692 flow [2023-11-06 22:59:21,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 104.48571428571428) internal successors, (3657), 35 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:21,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:21,571 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:21,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:21,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:21,777 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:59:21,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:21,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1073202183, now seen corresponding path program 4 times [2023-11-06 22:59:21,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:21,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815820906] [2023-11-06 22:59:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:21,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:22,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815820906] [2023-11-06 22:59:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815820906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658933475] [2023-11-06 22:59:22,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:59:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:22,167 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:22,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:59:22,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:59:22,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:22,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:59:22,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:23,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:23,832 INFO L322 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-06 22:59:23,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 227 treesize of output 159 [2023-11-06 22:59:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:24,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658933475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:24,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:24,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-11-06 22:59:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759897313] [2023-11-06 22:59:24,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:24,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:59:24,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:24,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:59:24,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:59:24,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 325 [2023-11-06 22:59:24,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 474 transitions, 7692 flow. Second operand has 25 states, 25 states have (on average 120.52) internal successors, (3013), 25 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) [2023-11-06 22:59:24,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:24,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 325 [2023-11-06 22:59:24,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:25,497 INFO L124 PetriNetUnfolderBase]: 1719/2914 cut-off events. [2023-11-06 22:59:25,497 INFO L125 PetriNetUnfolderBase]: For 44377/44419 co-relation queries the response was YES. [2023-11-06 22:59:25,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19716 conditions, 2914 events. 1719/2914 cut-off events. For 44377/44419 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 17182 event pairs, 736 based on Foata normal form. 74/2934 useless extension candidates. Maximal degree in co-relation 19650. Up to 2338 conditions per place. [2023-11-06 22:59:25,532 INFO L140 encePairwiseOnDemand]: 320/325 looper letters, 356 selfloop transitions, 22 changer transitions 2/390 dead transitions. [2023-11-06 22:59:25,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 390 transitions, 6828 flow [2023-11-06 22:59:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:59:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:59:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1354 transitions. [2023-11-06 22:59:25,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37874125874125875 [2023-11-06 22:59:25,536 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1354 transitions. [2023-11-06 22:59:25,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1354 transitions. [2023-11-06 22:59:25,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:25,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1354 transitions. [2023-11-06 22:59:25,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 123.0909090909091) internal successors, (1354), 11 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:25,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 325.0) internal successors, (3900), 12 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:25,544 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 325.0) internal successors, (3900), 12 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:25,544 INFO L175 Difference]: Start difference. First operand has 205 places, 474 transitions, 7692 flow. Second operand 11 states and 1354 transitions. [2023-11-06 22:59:25,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 390 transitions, 6828 flow [2023-11-06 22:59:25,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 390 transitions, 6483 flow, removed 58 selfloop flow, removed 20 redundant places. [2023-11-06 22:59:25,867 INFO L231 Difference]: Finished difference. Result has 193 places, 365 transitions, 5555 flow [2023-11-06 22:59:25,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=5436, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5555, PETRI_PLACES=193, PETRI_TRANSITIONS=365} [2023-11-06 22:59:25,868 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2023-11-06 22:59:25,868 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 365 transitions, 5555 flow [2023-11-06 22:59:25,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 120.52) internal successors, (3013), 25 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) [2023-11-06 22:59:25,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:25,869 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:25,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:26,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:26,075 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:59:26,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1171264887, now seen corresponding path program 1 times [2023-11-06 22:59:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:26,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486430453] [2023-11-06 22:59:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:26,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:27,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:27,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486430453] [2023-11-06 22:59:27,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486430453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:27,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071745153] [2023-11-06 22:59:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:27,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:27,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:27,324 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:27,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:59:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:27,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:59:27,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:28,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:29,176 INFO L322 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2023-11-06 22:59:29,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 250 treesize of output 210 [2023-11-06 22:59:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:59:31,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071745153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:31,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:31,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 7] total 32 [2023-11-06 22:59:31,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633828528] [2023-11-06 22:59:31,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:31,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:59:31,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:31,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:59:31,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:59:34,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 325 [2023-11-06 22:59:34,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 365 transitions, 5555 flow. Second operand has 34 states, 34 states have (on average 112.52941176470588) internal successors, (3826), 34 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:34,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:34,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 325 [2023-11-06 22:59:34,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:37,165 INFO L124 PetriNetUnfolderBase]: 2859/4780 cut-off events. [2023-11-06 22:59:37,165 INFO L125 PetriNetUnfolderBase]: For 61223/61223 co-relation queries the response was YES. [2023-11-06 22:59:37,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33145 conditions, 4780 events. 2859/4780 cut-off events. For 61223/61223 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28861 event pairs, 164 based on Foata normal form. 136/4916 useless extension candidates. Maximal degree in co-relation 33082. Up to 1471 conditions per place. [2023-11-06 22:59:37,214 INFO L140 encePairwiseOnDemand]: 315/325 looper letters, 186 selfloop transitions, 416 changer transitions 4/606 dead transitions. [2023-11-06 22:59:37,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 606 transitions, 10034 flow [2023-11-06 22:59:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:59:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:59:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3599 transitions. [2023-11-06 22:59:37,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3572208436724566 [2023-11-06 22:59:37,222 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3599 transitions. [2023-11-06 22:59:37,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3599 transitions. [2023-11-06 22:59:37,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:37,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3599 transitions. [2023-11-06 22:59:37,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 116.09677419354838) internal successors, (3599), 31 states have internal predecessors, (3599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:37,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 325.0) internal successors, (10400), 32 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:37,242 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 325.0) internal successors, (10400), 32 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:37,242 INFO L175 Difference]: Start difference. First operand has 193 places, 365 transitions, 5555 flow. Second operand 31 states and 3599 transitions. [2023-11-06 22:59:37,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 606 transitions, 10034 flow [2023-11-06 22:59:37,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 606 transitions, 10003 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-06 22:59:37,577 INFO L231 Difference]: Finished difference. Result has 223 places, 521 transitions, 9394 flow [2023-11-06 22:59:37,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=5412, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=9394, PETRI_PLACES=223, PETRI_TRANSITIONS=521} [2023-11-06 22:59:37,578 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2023-11-06 22:59:37,578 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 521 transitions, 9394 flow [2023-11-06 22:59:37,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 112.52941176470588) internal successors, (3826), 34 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:37,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:37,579 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:37,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:37,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:37,779 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:59:37,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:37,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1020936573, now seen corresponding path program 6 times [2023-11-06 22:59:37,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:37,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434293128] [2023-11-06 22:59:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:37,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:59:38,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:38,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434293128] [2023-11-06 22:59:38,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434293128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:38,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190496301] [2023-11-06 22:59:38,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:59:38,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:38,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:38,044 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:38,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:59:38,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:59:38,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:38,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-06 22:59:38,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:38,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:59:38,580 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 22:59:38,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:38,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 22:59:38,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:38,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 22:59:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:39,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:40,870 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:59:40,870 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 117 [2023-11-06 22:59:41,082 INFO L322 Elim1Store]: treesize reduction 26, result has 82.6 percent of original size [2023-11-06 22:59:41,082 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 665 treesize of output 684 [2023-11-06 22:59:41,113 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:59:41,117 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:59:41,119 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:59:41,147 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:59:41,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 188 [2023-11-06 22:59:41,222 INFO L322 Elim1Store]: treesize reduction 26, result has 54.4 percent of original size [2023-11-06 22:59:41,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 161 [2023-11-06 22:59:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:50,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190496301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:50,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:50,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 33 [2023-11-06 22:59:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965842697] [2023-11-06 22:59:50,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:50,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:59:50,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:59:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=884, Unknown=5, NotChecked=0, Total=1190 [2023-11-06 22:59:52,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 325 [2023-11-06 22:59:52,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 521 transitions, 9394 flow. Second operand has 35 states, 35 states have (on average 82.45714285714286) internal successors, (2886), 35 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:52,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:52,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 325 [2023-11-06 22:59:52,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:00,828 INFO L124 PetriNetUnfolderBase]: 3457/5822 cut-off events. [2023-11-06 23:00:00,828 INFO L125 PetriNetUnfolderBase]: For 104471/104471 co-relation queries the response was YES. [2023-11-06 23:00:00,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47360 conditions, 5822 events. 3457/5822 cut-off events. For 104471/104471 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 37340 event pairs, 302 based on Foata normal form. 144/5966 useless extension candidates. Maximal degree in co-relation 47289. Up to 3837 conditions per place. [2023-11-06 23:00:00,891 INFO L140 encePairwiseOnDemand]: 315/325 looper letters, 473 selfloop transitions, 282 changer transitions 42/797 dead transitions. [2023-11-06 23:00:00,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 797 transitions, 15620 flow [2023-11-06 23:00:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 23:00:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 23:00:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4197 transitions. [2023-11-06 23:00:00,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2635478806907378 [2023-11-06 23:00:00,899 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4197 transitions. [2023-11-06 23:00:00,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4197 transitions. [2023-11-06 23:00:00,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:00,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4197 transitions. [2023-11-06 23:00:00,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 85.65306122448979) internal successors, (4197), 49 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:00,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 325.0) internal successors, (16250), 50 states have internal predecessors, (16250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:00,925 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 325.0) internal successors, (16250), 50 states have internal predecessors, (16250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:00,925 INFO L175 Difference]: Start difference. First operand has 223 places, 521 transitions, 9394 flow. Second operand 49 states and 4197 transitions. [2023-11-06 23:00:00,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 797 transitions, 15620 flow [2023-11-06 23:00:01,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 797 transitions, 14606 flow, removed 382 selfloop flow, removed 16 redundant places. [2023-11-06 23:00:01,684 INFO L231 Difference]: Finished difference. Result has 280 places, 665 transitions, 13094 flow [2023-11-06 23:00:01,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=8703, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=13094, PETRI_PLACES=280, PETRI_TRANSITIONS=665} [2023-11-06 23:00:01,685 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 250 predicate places. [2023-11-06 23:00:01,685 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 665 transitions, 13094 flow [2023-11-06 23:00:01,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 82.45714285714286) internal successors, (2886), 35 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:01,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:01,686 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:01,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:01,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:01,892 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:00:01,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:01,892 INFO L85 PathProgramCache]: Analyzing trace with hash -906724309, now seen corresponding path program 5 times [2023-11-06 23:00:01,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:01,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833713382] [2023-11-06 23:00:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:01,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:03,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:03,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833713382] [2023-11-06 23:00:03,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833713382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:03,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679765804] [2023-11-06 23:00:03,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:00:03,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:03,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:03,625 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:03,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:00:03,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:00:03,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:03,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 23:00:03,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:04,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:06,721 INFO L322 Elim1Store]: treesize reduction 46, result has 60.7 percent of original size [2023-11-06 23:00:06,721 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 237 treesize of output 232 [2023-11-06 23:00:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:10,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679765804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:10,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:10,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-11-06 23:00:10,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602140657] [2023-11-06 23:00:10,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:10,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 23:00:10,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:10,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 23:00:10,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 23:00:20,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 325 [2023-11-06 23:00:20,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 665 transitions, 13094 flow. Second operand has 44 states, 44 states have (on average 102.22727272727273) internal successors, (4498), 44 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:20,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:20,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 325 [2023-11-06 23:00:20,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:25,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:00:31,760 INFO L124 PetriNetUnfolderBase]: 3413/5758 cut-off events. [2023-11-06 23:00:31,761 INFO L125 PetriNetUnfolderBase]: For 129618/129618 co-relation queries the response was YES. [2023-11-06 23:00:31,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46291 conditions, 5758 events. 3413/5758 cut-off events. For 129618/129618 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 36800 event pairs, 1412 based on Foata normal form. 28/5786 useless extension candidates. Maximal degree in co-relation 46195. Up to 5255 conditions per place. [2023-11-06 23:00:31,841 INFO L140 encePairwiseOnDemand]: 315/325 looper letters, 682 selfloop transitions, 58 changer transitions 18/758 dead transitions. [2023-11-06 23:00:31,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 758 transitions, 15451 flow [2023-11-06 23:00:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 23:00:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 23:00:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4294 transitions. [2023-11-06 23:00:31,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32225140712945594 [2023-11-06 23:00:31,848 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4294 transitions. [2023-11-06 23:00:31,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4294 transitions. [2023-11-06 23:00:31,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:31,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4294 transitions. [2023-11-06 23:00:31,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 104.73170731707317) internal successors, (4294), 41 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:31,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 325.0) internal successors, (13650), 42 states have internal predecessors, (13650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:31,870 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 325.0) internal successors, (13650), 42 states have internal predecessors, (13650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:31,871 INFO L175 Difference]: Start difference. First operand has 280 places, 665 transitions, 13094 flow. Second operand 41 states and 4294 transitions. [2023-11-06 23:00:31,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 758 transitions, 15451 flow [2023-11-06 23:00:33,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 758 transitions, 13916 flow, removed 736 selfloop flow, removed 19 redundant places. [2023-11-06 23:00:33,270 INFO L231 Difference]: Finished difference. Result has 303 places, 673 transitions, 12041 flow [2023-11-06 23:00:33,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=11662, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=12041, PETRI_PLACES=303, PETRI_TRANSITIONS=673} [2023-11-06 23:00:33,271 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2023-11-06 23:00:33,272 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 673 transitions, 12041 flow [2023-11-06 23:00:33,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 102.22727272727273) internal successors, (4498), 44 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:33,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:33,273 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:33,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:33,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 23:00:33,478 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 23:00:33,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:33,479 INFO L85 PathProgramCache]: Analyzing trace with hash -899401491, now seen corresponding path program 7 times [2023-11-06 23:00:33,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:33,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666416587] [2023-11-06 23:00:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:33,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:35,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:35,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666416587] [2023-11-06 23:00:35,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666416587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:35,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123576991] [2023-11-06 23:00:35,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:00:35,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:35,347 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:35,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264037df-1897-403d-b077-6176ab95e314/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:00:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:35,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 23:00:35,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:36,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:37,567 INFO L322 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-11-06 23:00:37,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 217 treesize of output 188 [2023-11-06 23:00:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:38,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123576991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:38,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:38,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-11-06 23:00:38,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844883440] [2023-11-06 23:00:38,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:38,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 23:00:38,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 23:00:38,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482