./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/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_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/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_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:13:56,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:13:56,867 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 21:13:56,871 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:13:56,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:13:56,914 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:13:56,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:13:56,916 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:13:56,917 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:13:56,922 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:13:56,923 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:13:56,923 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:13:56,924 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:13:56,927 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:13:56,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:13:56,928 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:13:56,928 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:13:56,929 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:13:56,929 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:13:56,930 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:13:56,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:13:56,931 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:13:56,933 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 21:13:56,933 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:13:56,934 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:13:56,934 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:13:56,935 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:13:56,935 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:13:56,936 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:13:56,936 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:13:56,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:13:56,938 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:13:56,938 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:13:56,939 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:13:56,939 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:13:56,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:13:56,940 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:13:56,940 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:13:56,940 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:13:56,941 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:13:56,941 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:13:56,942 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_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2023-11-06 21:13:57,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:13:57,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:13:57,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:13:57,283 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:13:57,283 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:13:57,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2023-11-06 21:14:00,423 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:14:00,693 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:14:00,693 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2023-11-06 21:14:00,707 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/data/dcb89d852/4946923b33f44bfcb68582162ba1708d/FLAG4eab6b168 [2023-11-06 21:14:00,721 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/data/dcb89d852/4946923b33f44bfcb68582162ba1708d [2023-11-06 21:14:00,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:14:00,732 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:14:00,735 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:00,736 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:14:00,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:14:00,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:00" (1/1) ... [2023-11-06 21:14:00,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a57247a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:00, skipping insertion in model container [2023-11-06 21:14:00,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:00" (1/1) ... [2023-11-06 21:14:00,780 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:14:00,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:00,977 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:14:01,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:01,013 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:14:01,013 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:14:01,021 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:14:01,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01 WrapperNode [2023-11-06 21:14:01,021 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:01,023 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:01,023 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:14:01,023 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:14:01,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,039 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,068 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 183 [2023-11-06 21:14:01,068 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:01,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:14:01,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:14:01,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:14:01,080 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,087 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,088 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,100 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,107 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,110 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,112 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,115 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:14:01,116 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:14:01,116 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:14:01,117 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:14:01,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (1/1) ... [2023-11-06 21:14:01,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:01,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:01,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:14:01,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:14:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:14:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:14:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:14:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:14:01,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:14:01,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:14:01,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:14:01,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:14:01,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 21:14:01,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 21:14:01,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:14:01,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:14:01,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:14:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:14:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:14:01,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:14:01,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:14:01,227 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 21:14:01,379 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:14:01,384 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:14:01,814 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:14:01,928 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:14:01,928 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 21:14:01,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:01 BoogieIcfgContainer [2023-11-06 21:14:01,931 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:14:01,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:14:01,952 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:14:01,955 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:14:01,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:14:00" (1/3) ... [2023-11-06 21:14:01,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac52799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:01, skipping insertion in model container [2023-11-06 21:14:01,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:01" (2/3) ... [2023-11-06 21:14:01,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac52799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:01, skipping insertion in model container [2023-11-06 21:14:01,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:01" (3/3) ... [2023-11-06 21:14:01,958 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-11-06 21:14:01,967 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:14:01,978 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:14:01,978 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-06 21:14:01,978 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:14:02,055 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 21:14:02,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 174 transitions, 369 flow [2023-11-06 21:14:02,194 INFO L124 PetriNetUnfolderBase]: 11/171 cut-off events. [2023-11-06 21:14:02,194 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:14:02,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 171 events. 11/171 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 151 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 138. Up to 3 conditions per place. [2023-11-06 21:14:02,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 174 transitions, 369 flow [2023-11-06 21:14:02,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 144 transitions, 300 flow [2023-11-06 21:14:02,211 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:14:02,231 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 144 transitions, 300 flow [2023-11-06 21:14:02,236 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 144 transitions, 300 flow [2023-11-06 21:14:02,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 144 transitions, 300 flow [2023-11-06 21:14:02,307 INFO L124 PetriNetUnfolderBase]: 10/144 cut-off events. [2023-11-06 21:14:02,307 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:14:02,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 144 events. 10/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 149 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 138. Up to 3 conditions per place. [2023-11-06 21:14:02,311 INFO L119 LiptonReduction]: Number of co-enabled transitions 1736 [2023-11-06 21:14:09,416 INFO L134 LiptonReduction]: Checked pairs total: 3918 [2023-11-06 21:14:09,417 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-06 21:14:09,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:14:09,440 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;@c5a776e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:14:09,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-11-06 21:14:09,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:14:09,444 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 21:14:09,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:14:09,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:09,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:14:09,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:09,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash 22674, now seen corresponding path program 1 times [2023-11-06 21:14:09,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:09,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141066003] [2023-11-06 21:14:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:09,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:09,765 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 21:14:09,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:09,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141066003] [2023-11-06 21:14:09,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141066003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:09,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:09,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:14:09,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796885132] [2023-11-06 21:14:09,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:09,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:09,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:09,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 320 [2023-11-06 21:14:09,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 21:14:09,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:09,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 320 [2023-11-06 21:14:09,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:10,185 INFO L124 PetriNetUnfolderBase]: 782/1169 cut-off events. [2023-11-06 21:14:10,186 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-06 21:14:10,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 1169 events. 782/1169 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4993 event pairs, 638 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 2251. Up to 1124 conditions per place. [2023-11-06 21:14:10,206 INFO L140 encePairwiseOnDemand]: 313/320 looper letters, 26 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2023-11-06 21:14:10,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 136 flow [2023-11-06 21:14:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:14:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-11-06 21:14:10,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2023-11-06 21:14:10,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-11-06 21:14:10,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-11-06 21:14:10,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:10,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-11-06 21:14:10,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 21:14:10,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 21:14:10,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 21:14:10,261 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 74 flow. Second operand 3 states and 474 transitions. [2023-11-06 21:14:10,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 136 flow [2023-11-06 21:14:10,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 21:14:10,270 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 94 flow [2023-11-06 21:14:10,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=3, PETRI_FLOW=94, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-06 21:14:10,277 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-06 21:14:10,278 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 94 flow [2023-11-06 21:14:10,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 21:14:10,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:10,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:14:10,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:14:10,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:10,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash 703591, now seen corresponding path program 1 times [2023-11-06 21:14:10,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:10,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128066140] [2023-11-06 21:14:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:10,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:10,509 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 21:14:10,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:10,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128066140] [2023-11-06 21:14:10,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128066140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:10,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601504601] [2023-11-06 21:14:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:10,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:10,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:10,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:10,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:14:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:10,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:14:10,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:10,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:10,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601504601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:10,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:10,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-06 21:14:10,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918377623] [2023-11-06 21:14:10,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:10,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:10,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:10,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:14:10,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 320 [2023-11-06 21:14:10,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 21:14:10,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:10,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 320 [2023-11-06 21:14:10,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:10,941 INFO L124 PetriNetUnfolderBase]: 781/1167 cut-off events. [2023-11-06 21:14:10,942 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:14:10,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2431 conditions, 1167 events. 781/1167 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4982 event pairs, 638 based on Foata normal form. 2/732 useless extension candidates. Maximal degree in co-relation 2406. Up to 1121 conditions per place. [2023-11-06 21:14:10,954 INFO L140 encePairwiseOnDemand]: 316/320 looper letters, 24 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-11-06 21:14:10,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 140 flow [2023-11-06 21:14:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:14:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:14:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 618 transitions. [2023-11-06 21:14:10,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4828125 [2023-11-06 21:14:10,958 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 618 transitions. [2023-11-06 21:14:10,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 618 transitions. [2023-11-06 21:14:10,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:10,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 618 transitions. [2023-11-06 21:14:10,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:10,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 21:14:10,967 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 21:14:10,967 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 94 flow. Second operand 4 states and 618 transitions. [2023-11-06 21:14:10,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 140 flow [2023-11-06 21:14:10,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 132 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 21:14:10,969 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 84 flow [2023-11-06 21:14:10,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-11-06 21:14:10,971 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-06 21:14:10,971 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 84 flow [2023-11-06 21:14:10,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 21:14:10,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:10,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:14:10,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 21:14:11,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 21:14:11,179 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:11,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:11,179 INFO L85 PathProgramCache]: Analyzing trace with hash 703589, now seen corresponding path program 1 times [2023-11-06 21:14:11,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:11,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458939824] [2023-11-06 21:14:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:11,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:11,285 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 21:14:11,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:11,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458939824] [2023-11-06 21:14:11,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458939824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:11,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286808066] [2023-11-06 21:14:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:11,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:11,288 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:11,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:14:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:11,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:14:11,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:11,411 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 21:14:11,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:11,428 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 21:14:11,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286808066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:11,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:14:11,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-06 21:14:11,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343804761] [2023-11-06 21:14:11,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:11,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:14:11,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:11,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:14:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:11,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 320 [2023-11-06 21:14:11,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states 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 21:14:11,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:11,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 320 [2023-11-06 21:14:11,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:11,680 INFO L124 PetriNetUnfolderBase]: 784/1173 cut-off events. [2023-11-06 21:14:11,681 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:14:11,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 1173 events. 784/1173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4995 event pairs, 638 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 2406. Up to 1127 conditions per place. [2023-11-06 21:14:11,693 INFO L140 encePairwiseOnDemand]: 316/320 looper letters, 25 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2023-11-06 21:14:11,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 182 flow [2023-11-06 21:14:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:14:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:14:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 919 transitions. [2023-11-06 21:14:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786458333333333 [2023-11-06 21:14:11,698 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 919 transitions. [2023-11-06 21:14:11,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 919 transitions. [2023-11-06 21:14:11,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:11,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 919 transitions. [2023-11-06 21:14:11,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.16666666666666) internal successors, (919), 6 states have internal predecessors, (919), 0 states have call successors, (0), 0 states 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 21:14:11,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states 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 21:14:11,708 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states 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 21:14:11,709 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 84 flow. Second operand 6 states and 919 transitions. [2023-11-06 21:14:11,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 182 flow [2023-11-06 21:14:11,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 173 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:14:11,711 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 142 flow [2023-11-06 21:14:11,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-11-06 21:14:11,712 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-11-06 21:14:11,712 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 142 flow [2023-11-06 21:14:11,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states 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 21:14:11,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:11,714 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 21:14:11,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:11,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:11,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:11,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash -513526446, now seen corresponding path program 2 times [2023-11-06 21:14:11,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:11,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288997778] [2023-11-06 21:14:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:11,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:12,030 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 21:14:12,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:12,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288997778] [2023-11-06 21:14:12,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288997778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:12,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134731582] [2023-11-06 21:14:12,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:14:12,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:12,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:12,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:12,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:14:12,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 21:14:12,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:14:12,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:14:12,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:12,159 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 21:14:12,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:12,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134731582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:12,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:12,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-06 21:14:12,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775315962] [2023-11-06 21:14:12,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:12,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:12,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:14:12,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 320 [2023-11-06 21:14:12,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 21:14:12,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:12,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 320 [2023-11-06 21:14:12,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:12,374 INFO L124 PetriNetUnfolderBase]: 784/1172 cut-off events. [2023-11-06 21:14:12,374 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 21:14:12,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2463 conditions, 1172 events. 784/1172 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4989 event pairs, 638 based on Foata normal form. 1/739 useless extension candidates. Maximal degree in co-relation 2433. Up to 1124 conditions per place. [2023-11-06 21:14:12,384 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 27 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-11-06 21:14:12,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 198 flow [2023-11-06 21:14:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:14:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-11-06 21:14:12,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49270833333333336 [2023-11-06 21:14:12,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-11-06 21:14:12,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-11-06 21:14:12,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:12,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-11-06 21:14:12,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 21:14:12,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 21:14:12,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 21:14:12,394 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 142 flow. Second operand 3 states and 473 transitions. [2023-11-06 21:14:12,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 198 flow [2023-11-06 21:14:12,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 161 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-11-06 21:14:12,397 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 107 flow [2023-11-06 21:14:12,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-11-06 21:14:12,398 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-11-06 21:14:12,398 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 107 flow [2023-11-06 21:14:12,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 21:14:12,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:12,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:14:12,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:12,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:12,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:12,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash -511255490, now seen corresponding path program 1 times [2023-11-06 21:14:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:12,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274960355] [2023-11-06 21:14:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:12,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:12,753 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 21:14:12,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274960355] [2023-11-06 21:14:12,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274960355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:12,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:12,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:12,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728687049] [2023-11-06 21:14:12,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:12,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:12,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:12,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 320 [2023-11-06 21:14:12,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:12,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:12,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 320 [2023-11-06 21:14:12,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:13,064 INFO L124 PetriNetUnfolderBase]: 874/1336 cut-off events. [2023-11-06 21:14:13,064 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 21:14:13,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2798 conditions, 1336 events. 874/1336 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6081 event pairs, 729 based on Foata normal form. 20/902 useless extension candidates. Maximal degree in co-relation 2406. Up to 1128 conditions per place. [2023-11-06 21:14:13,074 INFO L140 encePairwiseOnDemand]: 309/320 looper letters, 30 selfloop transitions, 2 changer transitions 14/48 dead transitions. [2023-11-06 21:14:13,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 231 flow [2023-11-06 21:14:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:14:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:14:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2023-11-06 21:14:13,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-11-06 21:14:13,078 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2023-11-06 21:14:13,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2023-11-06 21:14:13,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:13,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2023-11-06 21:14:13,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states 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 21:14:13,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 21:14:13,085 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 21:14:13,086 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 107 flow. Second operand 4 states and 624 transitions. [2023-11-06 21:14:13,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 231 flow [2023-11-06 21:14:13,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 48 transitions, 219 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:14:13,090 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 111 flow [2023-11-06 21:14:13,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-06 21:14:13,093 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-11-06 21:14:13,093 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 111 flow [2023-11-06 21:14:13,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:13,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:13,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:14:13,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:13,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1262821009, now seen corresponding path program 1 times [2023-11-06 21:14:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468386127] [2023-11-06 21:14:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:13,229 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 21:14:13,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:13,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468386127] [2023-11-06 21:14:13,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468386127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:13,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506606193] [2023-11-06 21:14:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:13,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:13,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:13,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:13,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:14:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:13,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:14:13,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:13,346 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 21:14:13,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:13,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506606193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:13,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:13,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-06 21:14:13,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696727111] [2023-11-06 21:14:13,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:13,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:13,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:13,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:13,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:13,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 320 [2023-11-06 21:14:13,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states 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 21:14:13,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:13,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 320 [2023-11-06 21:14:13,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:13,524 INFO L124 PetriNetUnfolderBase]: 601/899 cut-off events. [2023-11-06 21:14:13,525 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-11-06 21:14:13,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 899 events. 601/899 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3590 event pairs, 474 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 2111. Up to 862 conditions per place. [2023-11-06 21:14:13,534 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-06 21:14:13,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 163 flow [2023-11-06 21:14:13,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:14:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-11-06 21:14:13,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2023-11-06 21:14:13,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-11-06 21:14:13,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-11-06 21:14:13,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:13,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-11-06 21:14:13,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states 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 21:14:13,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 21:14:13,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 21:14:13,544 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 111 flow. Second operand 3 states and 475 transitions. [2023-11-06 21:14:13,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 163 flow [2023-11-06 21:14:13,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 159 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:14:13,547 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 101 flow [2023-11-06 21:14:13,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-06 21:14:13,548 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-06 21:14:13,548 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 101 flow [2023-11-06 21:14:13,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states 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 21:14:13,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:13,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:13,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:13,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:13,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:13,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:13,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1262821141, now seen corresponding path program 1 times [2023-11-06 21:14:13,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:13,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515342506] [2023-11-06 21:14:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:13,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:13,813 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 21:14:13,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:13,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515342506] [2023-11-06 21:14:13,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515342506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:13,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:13,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:13,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045806131] [2023-11-06 21:14:13,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:13,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:13,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:13,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:13,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:13,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 320 [2023-11-06 21:14:13,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 21:14:13,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:13,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 320 [2023-11-06 21:14:13,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:13,995 INFO L124 PetriNetUnfolderBase]: 455/709 cut-off events. [2023-11-06 21:14:13,995 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-11-06 21:14:13,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1690 conditions, 709 events. 455/709 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2904 event pairs, 155 based on Foata normal form. 0/553 useless extension candidates. Maximal degree in co-relation 1681. Up to 416 conditions per place. [2023-11-06 21:14:14,001 INFO L140 encePairwiseOnDemand]: 316/320 looper letters, 39 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2023-11-06 21:14:14,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 43 transitions, 215 flow [2023-11-06 21:14:14,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:14:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:14:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 620 transitions. [2023-11-06 21:14:14,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2023-11-06 21:14:14,005 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 620 transitions. [2023-11-06 21:14:14,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 620 transitions. [2023-11-06 21:14:14,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:14,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 620 transitions. [2023-11-06 21:14:14,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states 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 21:14:14,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 21:14:14,014 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 21:14:14,014 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 101 flow. Second operand 4 states and 620 transitions. [2023-11-06 21:14:14,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 43 transitions, 215 flow [2023-11-06 21:14:14,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:14:14,017 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 102 flow [2023-11-06 21:14:14,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, 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=4, PETRI_FLOW=102, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-11-06 21:14:14,018 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-11-06 21:14:14,021 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 102 flow [2023-11-06 21:14:14,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 21:14:14,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:14,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:14,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:14:14,022 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:14,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1262821140, now seen corresponding path program 1 times [2023-11-06 21:14:14,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:14,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329441060] [2023-11-06 21:14:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:14,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:14,092 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 21:14:14,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329441060] [2023-11-06 21:14:14,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329441060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:14,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:14,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525817053] [2023-11-06 21:14:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:14,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:14,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:14,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 320 [2023-11-06 21:14:14,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states 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 21:14:14,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:14,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 320 [2023-11-06 21:14:14,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:14,260 INFO L124 PetriNetUnfolderBase]: 381/591 cut-off events. [2023-11-06 21:14:14,260 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-06 21:14:14,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 591 events. 381/591 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2132 event pairs, 235 based on Foata normal form. 0/535 useless extension candidates. Maximal degree in co-relation 1449. Up to 450 conditions per place. [2023-11-06 21:14:14,265 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 37 selfloop transitions, 2 changer transitions 2/42 dead transitions. [2023-11-06 21:14:14,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 214 flow [2023-11-06 21:14:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:14:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-11-06 21:14:14,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2023-11-06 21:14:14,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-11-06 21:14:14,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-11-06 21:14:14,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:14,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-11-06 21:14:14,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 21:14:14,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 21:14:14,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 21:14:14,274 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 102 flow. Second operand 3 states and 476 transitions. [2023-11-06 21:14:14,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 214 flow [2023-11-06 21:14:14,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 208 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 21:14:14,276 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 94 flow [2023-11-06 21:14:14,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, 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=3, PETRI_FLOW=94, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-11-06 21:14:14,279 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-06 21:14:14,279 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 94 flow [2023-11-06 21:14:14,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states 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 21:14:14,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:14,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:14,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:14:14,280 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:14,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash 497551186, now seen corresponding path program 1 times [2023-11-06 21:14:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:14,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338467364] [2023-11-06 21:14:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:14,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:14,346 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 21:14:14,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:14,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338467364] [2023-11-06 21:14:14,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338467364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:14,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:14,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:14:14,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368492906] [2023-11-06 21:14:14,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:14,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:14,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:14,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 320 [2023-11-06 21:14:14,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 21:14:14,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:14,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 320 [2023-11-06 21:14:14,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:14,467 INFO L124 PetriNetUnfolderBase]: 327/522 cut-off events. [2023-11-06 21:14:14,467 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-06 21:14:14,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1321 conditions, 522 events. 327/522 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1852 event pairs, 119 based on Foata normal form. 22/498 useless extension candidates. Maximal degree in co-relation 1312. Up to 389 conditions per place. [2023-11-06 21:14:14,471 INFO L140 encePairwiseOnDemand]: 315/320 looper letters, 34 selfloop transitions, 2 changer transitions 3/41 dead transitions. [2023-11-06 21:14:14,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 207 flow [2023-11-06 21:14:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:14:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-11-06 21:14:14,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49895833333333334 [2023-11-06 21:14:14,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-11-06 21:14:14,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-11-06 21:14:14,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:14,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-11-06 21:14:14,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states 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 21:14:14,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 21:14:14,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 21:14:14,480 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 94 flow. Second operand 3 states and 479 transitions. [2023-11-06 21:14:14,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 207 flow [2023-11-06 21:14:14,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:14:14,486 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 108 flow [2023-11-06 21:14:14,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-11-06 21:14:14,488 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-06 21:14:14,488 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 108 flow [2023-11-06 21:14:14,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 21:14:14,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:14,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:14,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:14:14,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:14,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:14,490 INFO L85 PathProgramCache]: Analyzing trace with hash -655151043, now seen corresponding path program 1 times [2023-11-06 21:14:14,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:14,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472468103] [2023-11-06 21:14:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:14,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:14,965 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 21:14:14,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:14,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472468103] [2023-11-06 21:14:14,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472468103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:14,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904173922] [2023-11-06 21:14:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:14,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:14,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:14,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:14:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:15,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 21:14:15,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:15,170 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 23 treesize of output 1 [2023-11-06 21:14:15,233 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 21:14:15,296 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 21:14:15,398 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 21:14:15,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:15,882 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:15,883 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 62 treesize of output 50 [2023-11-06 21:14:15,925 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:15,925 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 148 treesize of output 140 [2023-11-06 21:14:15,946 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:15,946 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 132 treesize of output 116 [2023-11-06 21:14:15,977 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:15,978 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 83 treesize of output 79 [2023-11-06 21:14:16,484 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 21:14:16,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904173922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:16,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:14:16,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-11-06 21:14:16,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265608618] [2023-11-06 21:14:16,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:16,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:14:16,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:14:16,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=180, Unknown=1, NotChecked=0, Total=240 [2023-11-06 21:14:17,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 320 [2023-11-06 21:14:17,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 108 flow. Second operand has 16 states, 16 states have (on average 110.875) internal successors, (1774), 16 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states 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 21:14:17,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:17,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 320 [2023-11-06 21:14:17,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:17,848 INFO L124 PetriNetUnfolderBase]: 785/1259 cut-off events. [2023-11-06 21:14:17,849 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2023-11-06 21:14:17,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3235 conditions, 1259 events. 785/1259 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5680 event pairs, 344 based on Foata normal form. 0/1049 useless extension candidates. Maximal degree in co-relation 3224. Up to 564 conditions per place. [2023-11-06 21:14:17,859 INFO L140 encePairwiseOnDemand]: 311/320 looper letters, 54 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2023-11-06 21:14:17,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 72 transitions, 379 flow [2023-11-06 21:14:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:14:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:14:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 829 transitions. [2023-11-06 21:14:17,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37008928571428573 [2023-11-06 21:14:17,864 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 829 transitions. [2023-11-06 21:14:17,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 829 transitions. [2023-11-06 21:14:17,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:17,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 829 transitions. [2023-11-06 21:14:17,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 118.42857142857143) internal successors, (829), 7 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 21:14:17,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 320.0) internal successors, (2560), 8 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states 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 21:14:17,873 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 320.0) internal successors, (2560), 8 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states 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 21:14:17,873 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 108 flow. Second operand 7 states and 829 transitions. [2023-11-06 21:14:17,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 72 transitions, 379 flow [2023-11-06 21:14:17,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 72 transitions, 350 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-06 21:14:17,877 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 210 flow [2023-11-06 21:14:17,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=210, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-11-06 21:14:17,878 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-11-06 21:14:17,878 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 210 flow [2023-11-06 21:14:17,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 110.875) internal successors, (1774), 16 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states 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 21:14:17,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:17,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:17,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:18,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:14:18,086 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:18,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:18,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1165156330, now seen corresponding path program 1 times [2023-11-06 21:14:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:18,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895121744] [2023-11-06 21:14:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:18,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:18,663 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 21:14:18,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:18,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895121744] [2023-11-06 21:14:18,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895121744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:18,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952342360] [2023-11-06 21:14:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:18,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:18,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:18,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:18,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:14:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:18,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:14:18,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:18,807 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 60 treesize of output 58 [2023-11-06 21:14:19,043 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 16 treesize of output 11 [2023-11-06 21:14:19,072 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 21:14:19,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:19,156 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:19,156 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 46 treesize of output 38 [2023-11-06 21:14:19,177 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 11 treesize of output 5 [2023-11-06 21:14:19,441 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 21:14:19,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952342360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:19,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:14:19,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-06 21:14:19,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618092628] [2023-11-06 21:14:19,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:19,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:14:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:14:19,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=224, Unknown=3, NotChecked=0, Total=272 [2023-11-06 21:14:21,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:14:22,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 320 [2023-11-06 21:14:22,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 210 flow. Second operand has 17 states, 17 states have (on average 113.94117647058823) internal successors, (1937), 17 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states 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 21:14:22,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:22,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 320 [2023-11-06 21:14:22,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:24,148 INFO L124 PetriNetUnfolderBase]: 1728/2720 cut-off events. [2023-11-06 21:14:24,148 INFO L125 PetriNetUnfolderBase]: For 2458/2458 co-relation queries the response was YES. [2023-11-06 21:14:24,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8048 conditions, 2720 events. 1728/2720 cut-off events. For 2458/2458 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13902 event pairs, 590 based on Foata normal form. 0/2354 useless extension candidates. Maximal degree in co-relation 8034. Up to 1315 conditions per place. [2023-11-06 21:14:24,174 INFO L140 encePairwiseOnDemand]: 310/320 looper letters, 107 selfloop transitions, 37 changer transitions 6/152 dead transitions. [2023-11-06 21:14:24,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 152 transitions, 940 flow [2023-11-06 21:14:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:14:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 21:14:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1703 transitions. [2023-11-06 21:14:24,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3801339285714286 [2023-11-06 21:14:24,185 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1703 transitions. [2023-11-06 21:14:24,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1703 transitions. [2023-11-06 21:14:24,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:24,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1703 transitions. [2023-11-06 21:14:24,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 121.64285714285714) internal successors, (1703), 14 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states 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 21:14:24,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 320.0) internal successors, (4800), 15 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 21:14:24,205 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 320.0) internal successors, (4800), 15 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 21:14:24,205 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 210 flow. Second operand 14 states and 1703 transitions. [2023-11-06 21:14:24,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 152 transitions, 940 flow [2023-11-06 21:14:24,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 152 transitions, 931 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 21:14:24,214 INFO L231 Difference]: Finished difference. Result has 61 places, 70 transitions, 558 flow [2023-11-06 21:14:24,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=558, PETRI_PLACES=61, PETRI_TRANSITIONS=70} [2023-11-06 21:14:24,215 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-11-06 21:14:24,216 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 70 transitions, 558 flow [2023-11-06 21:14:24,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 113.94117647058823) internal successors, (1937), 17 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states 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 21:14:24,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:24,218 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:24,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:24,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:24,424 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:24,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash 58647364, now seen corresponding path program 1 times [2023-11-06 21:14:24,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431112381] [2023-11-06 21:14:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:25,671 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 21:14:25,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:25,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431112381] [2023-11-06 21:14:25,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431112381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:25,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844025110] [2023-11-06 21:14:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:25,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:25,674 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:25,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:14:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:25,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:14:25,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:25,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:25,947 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 21:14:25,987 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 21:14:25,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:25,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844025110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:25,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:25,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-06 21:14:25,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290565393] [2023-11-06 21:14:25,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:25,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:14:25,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:25,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:14:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:14:26,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 320 [2023-11-06 21:14:26,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 70 transitions, 558 flow. Second operand has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:26,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:26,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 320 [2023-11-06 21:14:26,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:26,789 INFO L124 PetriNetUnfolderBase]: 1872/2943 cut-off events. [2023-11-06 21:14:26,789 INFO L125 PetriNetUnfolderBase]: For 7172/7172 co-relation queries the response was YES. [2023-11-06 21:14:26,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10243 conditions, 2943 events. 1872/2943 cut-off events. For 7172/7172 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15168 event pairs, 530 based on Foata normal form. 44/2640 useless extension candidates. Maximal degree in co-relation 10221. Up to 2074 conditions per place. [2023-11-06 21:14:26,820 INFO L140 encePairwiseOnDemand]: 313/320 looper letters, 72 selfloop transitions, 18 changer transitions 3/95 dead transitions. [2023-11-06 21:14:26,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 95 transitions, 858 flow [2023-11-06 21:14:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:14:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:14:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 720 transitions. [2023-11-06 21:14:26,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-06 21:14:26,824 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 720 transitions. [2023-11-06 21:14:26,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 720 transitions. [2023-11-06 21:14:26,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:26,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 720 transitions. [2023-11-06 21:14:26,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 21:14:26,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 21:14:26,831 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 21:14:26,832 INFO L175 Difference]: Start difference. First operand has 61 places, 70 transitions, 558 flow. Second operand 5 states and 720 transitions. [2023-11-06 21:14:26,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 95 transitions, 858 flow [2023-11-06 21:14:26,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 95 transitions, 811 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-06 21:14:26,858 INFO L231 Difference]: Finished difference. Result has 62 places, 75 transitions, 618 flow [2023-11-06 21:14:26,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=618, PETRI_PLACES=62, PETRI_TRANSITIONS=75} [2023-11-06 21:14:26,859 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2023-11-06 21:14:26,859 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 75 transitions, 618 flow [2023-11-06 21:14:26,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:26,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:26,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:26,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:27,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:27,066 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:27,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1818070407, now seen corresponding path program 1 times [2023-11-06 21:14:27,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:27,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55227801] [2023-11-06 21:14:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:27,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:27,870 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 21:14:27,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:27,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55227801] [2023-11-06 21:14:27,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55227801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:27,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404252853] [2023-11-06 21:14:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:27,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:27,873 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:27,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:14:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:28,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 21:14:28,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:28,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:28,016 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 26 treesize of output 24 [2023-11-06 21:14:28,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:28,170 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 21:14:28,224 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 21:14:28,250 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 21:14:28,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:28,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404252853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:28,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:28,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-06 21:14:28,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679290692] [2023-11-06 21:14:28,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:28,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:14:28,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:28,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:14:28,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:14:28,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 320 [2023-11-06 21:14:28,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 75 transitions, 618 flow. Second operand has 7 states, 7 states have (on average 134.57142857142858) internal successors, (942), 7 states have internal predecessors, (942), 0 states have call successors, (0), 0 states 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 21:14:28,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:28,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 320 [2023-11-06 21:14:28,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:29,050 INFO L124 PetriNetUnfolderBase]: 1766/2780 cut-off events. [2023-11-06 21:14:29,050 INFO L125 PetriNetUnfolderBase]: For 8249/8249 co-relation queries the response was YES. [2023-11-06 21:14:29,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9981 conditions, 2780 events. 1766/2780 cut-off events. For 8249/8249 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14368 event pairs, 532 based on Foata normal form. 38/2529 useless extension candidates. Maximal degree in co-relation 9957. Up to 1284 conditions per place. [2023-11-06 21:14:29,073 INFO L140 encePairwiseOnDemand]: 314/320 looper letters, 64 selfloop transitions, 26 changer transitions 3/95 dead transitions. [2023-11-06 21:14:29,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 885 flow [2023-11-06 21:14:29,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:14:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:14:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 709 transitions. [2023-11-06 21:14:29,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.443125 [2023-11-06 21:14:29,077 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 709 transitions. [2023-11-06 21:14:29,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 709 transitions. [2023-11-06 21:14:29,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:29,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 709 transitions. [2023-11-06 21:14:29,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states 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 21:14:29,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 21:14:29,085 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 21:14:29,085 INFO L175 Difference]: Start difference. First operand has 62 places, 75 transitions, 618 flow. Second operand 5 states and 709 transitions. [2023-11-06 21:14:29,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 885 flow [2023-11-06 21:14:29,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 863 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 21:14:29,124 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 666 flow [2023-11-06 21:14:29,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=666, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2023-11-06 21:14:29,125 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-11-06 21:14:29,125 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 666 flow [2023-11-06 21:14:29,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 134.57142857142858) internal successors, (942), 7 states have internal predecessors, (942), 0 states have call successors, (0), 0 states 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 21:14:29,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:29,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:29,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:14:29,337 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:29,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1194650350, now seen corresponding path program 2 times [2023-11-06 21:14:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:29,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106530216] [2023-11-06 21:14:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:29,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:30,116 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 21:14:30,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:30,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106530216] [2023-11-06 21:14:30,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106530216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:30,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953291464] [2023-11-06 21:14:30,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:14:30,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:30,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:30,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:30,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:14:30,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 21:14:30,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:14:30,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:14:30,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:30,262 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 105 treesize of output 101 [2023-11-06 21:14:30,417 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 21:14:30,466 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 21:14:30,499 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 21:14:30,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:30,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953291464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:30,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:14:30,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-11-06 21:14:30,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247038100] [2023-11-06 21:14:30,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:30,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:14:30,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:14:30,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:14:30,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 320 [2023-11-06 21:14:30,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 666 flow. Second operand has 7 states, 7 states have (on average 134.57142857142858) internal successors, (942), 7 states have internal predecessors, (942), 0 states have call successors, (0), 0 states 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 21:14:30,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:30,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 320 [2023-11-06 21:14:30,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:31,200 INFO L124 PetriNetUnfolderBase]: 1619/2557 cut-off events. [2023-11-06 21:14:31,200 INFO L125 PetriNetUnfolderBase]: For 9767/9767 co-relation queries the response was YES. [2023-11-06 21:14:31,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9442 conditions, 2557 events. 1619/2557 cut-off events. For 9767/9767 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13090 event pairs, 532 based on Foata normal form. 60/2367 useless extension candidates. Maximal degree in co-relation 9418. Up to 1284 conditions per place. [2023-11-06 21:14:31,225 INFO L140 encePairwiseOnDemand]: 315/320 looper letters, 64 selfloop transitions, 22 changer transitions 3/91 dead transitions. [2023-11-06 21:14:31,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 872 flow [2023-11-06 21:14:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:14:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:14:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 708 transitions. [2023-11-06 21:14:31,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425 [2023-11-06 21:14:31,229 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 708 transitions. [2023-11-06 21:14:31,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 708 transitions. [2023-11-06 21:14:31,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:31,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 708 transitions. [2023-11-06 21:14:31,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 21:14:31,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 21:14:31,237 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 21:14:31,237 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 666 flow. Second operand 5 states and 708 transitions. [2023-11-06 21:14:31,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 872 flow [2023-11-06 21:14:31,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 841 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-06 21:14:31,261 INFO L231 Difference]: Finished difference. Result has 64 places, 70 transitions, 617 flow [2023-11-06 21:14:31,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=617, PETRI_PLACES=64, PETRI_TRANSITIONS=70} [2023-11-06 21:14:31,262 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-11-06 21:14:31,262 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 70 transitions, 617 flow [2023-11-06 21:14:31,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 134.57142857142858) internal successors, (942), 7 states have internal predecessors, (942), 0 states have call successors, (0), 0 states 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 21:14:31,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:31,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:31,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:31,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:14:31,486 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:31,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1272783684, now seen corresponding path program 1 times [2023-11-06 21:14:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:31,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143256218] [2023-11-06 21:14:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:31,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:31,636 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 21:14:31,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:31,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143256218] [2023-11-06 21:14:31,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143256218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:31,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639922889] [2023-11-06 21:14:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:31,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:31,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:31,641 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:31,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:14:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:31,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:14:31,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:31,857 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 21:14:31,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:31,972 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 21:14:31,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639922889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:31,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:14:31,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-11-06 21:14:31,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211353818] [2023-11-06 21:14:31,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:31,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:14:31,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:31,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:14:31,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:14:32,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 320 [2023-11-06 21:14:32,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 70 transitions, 617 flow. Second operand has 13 states, 13 states have (on average 139.92307692307693) internal successors, (1819), 13 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states 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 21:14:32,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:32,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 320 [2023-11-06 21:14:32,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:32,797 INFO L124 PetriNetUnfolderBase]: 1491/2406 cut-off events. [2023-11-06 21:14:32,798 INFO L125 PetriNetUnfolderBase]: For 10623/10623 co-relation queries the response was YES. [2023-11-06 21:14:32,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8712 conditions, 2406 events. 1491/2406 cut-off events. For 10623/10623 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12606 event pairs, 581 based on Foata normal form. 94/2263 useless extension candidates. Maximal degree in co-relation 8689. Up to 838 conditions per place. [2023-11-06 21:14:32,811 INFO L140 encePairwiseOnDemand]: 313/320 looper letters, 38 selfloop transitions, 5 changer transitions 59/104 dead transitions. [2023-11-06 21:14:32,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 104 transitions, 909 flow [2023-11-06 21:14:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:14:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 21:14:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1178 transitions. [2023-11-06 21:14:32,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46015625 [2023-11-06 21:14:32,817 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1178 transitions. [2023-11-06 21:14:32,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1178 transitions. [2023-11-06 21:14:32,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:32,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1178 transitions. [2023-11-06 21:14:32,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 147.25) internal successors, (1178), 8 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states 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 21:14:32,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 320.0) internal successors, (2880), 9 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states 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 21:14:32,828 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 320.0) internal successors, (2880), 9 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states 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 21:14:32,828 INFO L175 Difference]: Start difference. First operand has 64 places, 70 transitions, 617 flow. Second operand 8 states and 1178 transitions. [2023-11-06 21:14:32,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 104 transitions, 909 flow [2023-11-06 21:14:32,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 865 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 21:14:32,851 INFO L231 Difference]: Finished difference. Result has 68 places, 37 transitions, 262 flow [2023-11-06 21:14:32,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=262, PETRI_PLACES=68, PETRI_TRANSITIONS=37} [2023-11-06 21:14:32,853 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-11-06 21:14:32,853 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 37 transitions, 262 flow [2023-11-06 21:14:32,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 139.92307692307693) internal successors, (1819), 13 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states 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 21:14:32,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:32,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:32,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:33,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:14:33,061 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:33,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:33,061 INFO L85 PathProgramCache]: Analyzing trace with hash 917445647, now seen corresponding path program 2 times [2023-11-06 21:14:33,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:33,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104199487] [2023-11-06 21:14:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:33,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:14:33,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:33,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104199487] [2023-11-06 21:14:33,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104199487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:33,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:33,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:33,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865768684] [2023-11-06 21:14:33,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:33,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:14:33,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:14:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:14:33,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 320 [2023-11-06 21:14:33,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 37 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states 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 21:14:33,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:33,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 320 [2023-11-06 21:14:33,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:33,547 INFO L124 PetriNetUnfolderBase]: 1226/1989 cut-off events. [2023-11-06 21:14:33,548 INFO L125 PetriNetUnfolderBase]: For 10514/10610 co-relation queries the response was YES. [2023-11-06 21:14:33,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7408 conditions, 1989 events. 1226/1989 cut-off events. For 10514/10610 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9957 event pairs, 355 based on Foata normal form. 60/1851 useless extension candidates. Maximal degree in co-relation 7389. Up to 829 conditions per place. [2023-11-06 21:14:33,561 INFO L140 encePairwiseOnDemand]: 315/320 looper letters, 59 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-11-06 21:14:33,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 635 flow [2023-11-06 21:14:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:14:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:14:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 644 transitions. [2023-11-06 21:14:33,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503125 [2023-11-06 21:14:33,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 644 transitions. [2023-11-06 21:14:33,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 644 transitions. [2023-11-06 21:14:33,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:33,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 644 transitions. [2023-11-06 21:14:33,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 21:14:33,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 21:14:33,572 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 21:14:33,572 INFO L175 Difference]: Start difference. First operand has 68 places, 37 transitions, 262 flow. Second operand 4 states and 644 transitions. [2023-11-06 21:14:33,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 635 flow [2023-11-06 21:14:33,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 541 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-11-06 21:14:33,587 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 367 flow [2023-11-06 21:14:33,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=367, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-11-06 21:14:33,588 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-11-06 21:14:33,588 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 367 flow [2023-11-06 21:14:33,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states 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 21:14:33,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:33,589 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:33,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 21:14:33,589 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:33,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:33,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1282739918, now seen corresponding path program 3 times [2023-11-06 21:14:33,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:33,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602364524] [2023-11-06 21:14:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:33,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:34,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:34,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602364524] [2023-11-06 21:14:34,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602364524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:34,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108563173] [2023-11-06 21:14:34,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:14:34,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:34,215 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:34,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:14:34,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:14:34,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:14:34,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 21:14:34,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:34,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:34,919 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:14:34,920 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 27 treesize of output 19 [2023-11-06 21:14:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:35,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108563173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:35,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:14:35,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-06 21:14:35,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215641001] [2023-11-06 21:14:35,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:35,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:14:35,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:35,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:14:35,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:14:36,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 320 [2023-11-06 21:14:36,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 367 flow. Second operand has 26 states, 26 states have (on average 131.73076923076923) internal successors, (3425), 26 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states 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 21:14:36,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:36,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 320 [2023-11-06 21:14:36,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:38,109 INFO L124 PetriNetUnfolderBase]: 3341/5638 cut-off events. [2023-11-06 21:14:38,109 INFO L125 PetriNetUnfolderBase]: For 19595/19595 co-relation queries the response was YES. [2023-11-06 21:14:38,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19041 conditions, 5638 events. 3341/5638 cut-off events. For 19595/19595 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 35319 event pairs, 1262 based on Foata normal form. 164/5145 useless extension candidates. Maximal degree in co-relation 19026. Up to 1945 conditions per place. [2023-11-06 21:14:38,151 INFO L140 encePairwiseOnDemand]: 311/320 looper letters, 144 selfloop transitions, 46 changer transitions 9/201 dead transitions. [2023-11-06 21:14:38,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 201 transitions, 1610 flow [2023-11-06 21:14:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:14:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 21:14:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2515 transitions. [2023-11-06 21:14:38,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366319444444444 [2023-11-06 21:14:38,162 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2515 transitions. [2023-11-06 21:14:38,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2515 transitions. [2023-11-06 21:14:38,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:38,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2515 transitions. [2023-11-06 21:14:38,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.72222222222223) internal successors, (2515), 18 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states 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 21:14:38,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 320.0) internal successors, (6080), 19 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states 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 21:14:38,183 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 320.0) internal successors, (6080), 19 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states 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 21:14:38,184 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 367 flow. Second operand 18 states and 2515 transitions. [2023-11-06 21:14:38,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 201 transitions, 1610 flow [2023-11-06 21:14:38,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 201 transitions, 1568 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-11-06 21:14:38,198 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 1026 flow [2023-11-06 21:14:38,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1026, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2023-11-06 21:14:38,199 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2023-11-06 21:14:38,199 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 1026 flow [2023-11-06 21:14:38,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 131.73076923076923) internal successors, (3425), 26 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states 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 21:14:38,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:38,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:38,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:38,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:14:38,418 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:38,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:38,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1577069108, now seen corresponding path program 4 times [2023-11-06 21:14:38,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:38,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307308852] [2023-11-06 21:14:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:39,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:39,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307308852] [2023-11-06 21:14:39,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307308852] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:39,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703401867] [2023-11-06 21:14:39,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:14:39,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:39,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:39,049 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:39,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:14:39,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:14:39,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:14:39,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:14:39,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:39,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:40,086 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 21:14:40,086 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 49 treesize of output 52 [2023-11-06 21:14:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:40,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703401867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:40,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:14:40,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-06 21:14:40,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681886474] [2023-11-06 21:14:40,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:40,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:14:40,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:40,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:14:40,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:14:42,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 320 [2023-11-06 21:14:42,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 1026 flow. Second operand has 26 states, 26 states have (on average 129.73076923076923) internal successors, (3373), 26 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states 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 21:14:42,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:42,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 320 [2023-11-06 21:14:42,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:14:49,544 INFO L124 PetriNetUnfolderBase]: 7141/11907 cut-off events. [2023-11-06 21:14:49,544 INFO L125 PetriNetUnfolderBase]: For 88040/88040 co-relation queries the response was YES. [2023-11-06 21:14:49,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50659 conditions, 11907 events. 7141/11907 cut-off events. For 88040/88040 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 83386 event pairs, 1516 based on Foata normal form. 134/10675 useless extension candidates. Maximal degree in co-relation 50631. Up to 2244 conditions per place. [2023-11-06 21:14:49,650 INFO L140 encePairwiseOnDemand]: 310/320 looper letters, 296 selfloop transitions, 216 changer transitions 33/547 dead transitions. [2023-11-06 21:14:49,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 547 transitions, 5581 flow [2023-11-06 21:14:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 21:14:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 21:14:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5670 transitions. [2023-11-06 21:14:49,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4321646341463415 [2023-11-06 21:14:49,665 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5670 transitions. [2023-11-06 21:14:49,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5670 transitions. [2023-11-06 21:14:49,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:14:49,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5670 transitions. [2023-11-06 21:14:49,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 138.29268292682926) internal successors, (5670), 41 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states 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 21:14:49,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 320.0) internal successors, (13440), 42 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states 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 21:14:49,836 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 320.0) internal successors, (13440), 42 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states 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 21:14:49,836 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 1026 flow. Second operand 41 states and 5670 transitions. [2023-11-06 21:14:49,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 547 transitions, 5581 flow [2023-11-06 21:14:50,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 547 transitions, 4671 flow, removed 450 selfloop flow, removed 4 redundant places. [2023-11-06 21:14:50,153 INFO L231 Difference]: Finished difference. Result has 118 places, 278 transitions, 3360 flow [2023-11-06 21:14:50,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=3360, PETRI_PLACES=118, PETRI_TRANSITIONS=278} [2023-11-06 21:14:50,154 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-11-06 21:14:50,154 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 278 transitions, 3360 flow [2023-11-06 21:14:50,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 129.73076923076923) internal successors, (3373), 26 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states 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 21:14:50,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:14:50,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:50,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 21:14:50,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:14:50,362 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:14:50,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:50,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1164692716, now seen corresponding path program 1 times [2023-11-06 21:14:50,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:50,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284201167] [2023-11-06 21:14:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:50,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:51,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:51,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284201167] [2023-11-06 21:14:51,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284201167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:14:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800996056] [2023-11-06 21:14:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:51,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:51,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:51,438 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:51,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:14:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:51,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 21:14:51,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:14:51,936 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 21:14:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:52,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:52,682 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-06 21:14:52,683 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 98 treesize of output 90 [2023-11-06 21:14:52,711 INFO L322 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-11-06 21:14:52,712 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 49 treesize of output 37 [2023-11-06 21:14:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:53,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800996056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:53,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:14:53,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-06 21:14:53,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451740623] [2023-11-06 21:14:53,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:14:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:14:53,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=680, Unknown=1, NotChecked=0, Total=812 [2023-11-06 21:14:54,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 320 [2023-11-06 21:14:54,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 278 transitions, 3360 flow. Second operand has 29 states, 29 states have (on average 112.55172413793103) internal successors, (3264), 29 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states 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 21:14:54,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:14:54,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 320 [2023-11-06 21:14:54,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:02,387 INFO L124 PetriNetUnfolderBase]: 11901/19979 cut-off events. [2023-11-06 21:15:02,387 INFO L125 PetriNetUnfolderBase]: For 114640/114640 co-relation queries the response was YES. [2023-11-06 21:15:02,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81190 conditions, 19979 events. 11901/19979 cut-off events. For 114640/114640 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 151200 event pairs, 1976 based on Foata normal form. 243/17706 useless extension candidates. Maximal degree in co-relation 81160. Up to 8852 conditions per place. [2023-11-06 21:15:02,550 INFO L140 encePairwiseOnDemand]: 310/320 looper letters, 504 selfloop transitions, 238 changer transitions 131/875 dead transitions. [2023-11-06 21:15:02,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 875 transitions, 10339 flow [2023-11-06 21:15:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-06 21:15:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-06 21:15:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 5418 transitions. [2023-11-06 21:15:02,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37625 [2023-11-06 21:15:02,567 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 5418 transitions. [2023-11-06 21:15:02,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 5418 transitions. [2023-11-06 21:15:02,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:02,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 5418 transitions. [2023-11-06 21:15:02,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 120.4) internal successors, (5418), 45 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states 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 21:15:02,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 320.0) internal successors, (14720), 46 states have internal predecessors, (14720), 0 states have call successors, (0), 0 states 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 21:15:02,616 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 320.0) internal successors, (14720), 46 states have internal predecessors, (14720), 0 states have call successors, (0), 0 states 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 21:15:02,616 INFO L175 Difference]: Start difference. First operand has 118 places, 278 transitions, 3360 flow. Second operand 45 states and 5418 transitions. [2023-11-06 21:15:02,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 875 transitions, 10339 flow [2023-11-06 21:15:04,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 875 transitions, 7803 flow, removed 1263 selfloop flow, removed 4 redundant places. [2023-11-06 21:15:04,175 INFO L231 Difference]: Finished difference. Result has 186 places, 468 transitions, 5523 flow [2023-11-06 21:15:04,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5523, PETRI_PLACES=186, PETRI_TRANSITIONS=468} [2023-11-06 21:15:04,176 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 148 predicate places. [2023-11-06 21:15:04,177 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 468 transitions, 5523 flow [2023-11-06 21:15:04,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 112.55172413793103) internal successors, (3264), 29 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states 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 21:15:04,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:04,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:04,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:04,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:04,384 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:15:04,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:04,385 INFO L85 PathProgramCache]: Analyzing trace with hash 254098413, now seen corresponding path program 1 times [2023-11-06 21:15:04,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:04,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92989770] [2023-11-06 21:15:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:04,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:05,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:05,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92989770] [2023-11-06 21:15:05,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92989770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:05,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607104352] [2023-11-06 21:15:05,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:05,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:05,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:05,355 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:05,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:15:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:05,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 21:15:05,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:05,653 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 21:15:05,653 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 25 treesize of output 10 [2023-11-06 21:15:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:15:05,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:05,792 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:05,793 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 26 treesize of output 18 [2023-11-06 21:15:05,930 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:05,930 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 30 treesize of output 22 [2023-11-06 21:15:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:15:06,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607104352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:06,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:06,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-11-06 21:15:06,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000854394] [2023-11-06 21:15:06,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:06,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:15:06,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:06,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:15:06,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:15:06,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 320 [2023-11-06 21:15:06,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 468 transitions, 5523 flow. Second operand has 21 states, 21 states have (on average 132.23809523809524) internal successors, (2777), 21 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states 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 21:15:06,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:06,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 320 [2023-11-06 21:15:06,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:12,960 INFO L124 PetriNetUnfolderBase]: 12075/20535 cut-off events. [2023-11-06 21:15:12,960 INFO L125 PetriNetUnfolderBase]: For 109604/109604 co-relation queries the response was YES. [2023-11-06 21:15:13,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81269 conditions, 20535 events. 12075/20535 cut-off events. For 109604/109604 co-relation queries the response was YES. Maximal size of possible extension queue 967. Compared 160956 event pairs, 5077 based on Foata normal form. 319/18365 useless extension candidates. Maximal degree in co-relation 81209. Up to 13646 conditions per place. [2023-11-06 21:15:13,195 INFO L140 encePairwiseOnDemand]: 308/320 looper letters, 499 selfloop transitions, 153 changer transitions 49/703 dead transitions. [2023-11-06 21:15:13,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 703 transitions, 8370 flow [2023-11-06 21:15:13,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 21:15:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 21:15:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3508 transitions. [2023-11-06 21:15:13,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385 [2023-11-06 21:15:13,203 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3508 transitions. [2023-11-06 21:15:13,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3508 transitions. [2023-11-06 21:15:13,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:13,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3508 transitions. [2023-11-06 21:15:13,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 140.32) internal successors, (3508), 25 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states 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 21:15:13,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 320.0) internal successors, (8320), 26 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states 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 21:15:13,224 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 320.0) internal successors, (8320), 26 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states 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 21:15:13,224 INFO L175 Difference]: Start difference. First operand has 186 places, 468 transitions, 5523 flow. Second operand 25 states and 3508 transitions. [2023-11-06 21:15:13,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 703 transitions, 8370 flow [2023-11-06 21:15:15,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 703 transitions, 7891 flow, removed 230 selfloop flow, removed 10 redundant places. [2023-11-06 21:15:15,576 INFO L231 Difference]: Finished difference. Result has 211 places, 508 transitions, 6354 flow [2023-11-06 21:15:15,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=4402, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6354, PETRI_PLACES=211, PETRI_TRANSITIONS=508} [2023-11-06 21:15:15,577 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 173 predicate places. [2023-11-06 21:15:15,577 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 508 transitions, 6354 flow [2023-11-06 21:15:15,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 132.23809523809524) internal successors, (2777), 21 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states 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 21:15:15,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:15,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:15,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:15,785 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:15:15,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1749551011, now seen corresponding path program 2 times [2023-11-06 21:15:15,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:15,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749367823] [2023-11-06 21:15:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:15,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:16,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:16,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749367823] [2023-11-06 21:15:16,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749367823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:16,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207890838] [2023-11-06 21:15:16,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:15:16,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:16,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:16,889 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:16,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:15:17,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:15:17,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:17,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 21:15:17,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:17,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:17,409 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 21:15:17,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-06 21:15:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:17,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:17,816 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:17,817 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 26 treesize of output 18 [2023-11-06 21:15:18,398 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:18,399 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 67 treesize of output 59 [2023-11-06 21:15:18,407 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 46 treesize of output 40 [2023-11-06 21:15:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:19,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207890838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:19,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:19,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-06 21:15:19,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757272702] [2023-11-06 21:15:19,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:19,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:15:19,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:15:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=688, Unknown=1, NotChecked=0, Total=812 [2023-11-06 21:15:20,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 320 [2023-11-06 21:15:20,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 508 transitions, 6354 flow. Second operand has 29 states, 29 states have (on average 112.65517241379311) internal successors, (3267), 29 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states 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 21:15:20,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:20,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 320 [2023-11-06 21:15:20,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:26,584 INFO L124 PetriNetUnfolderBase]: 7283/12449 cut-off events. [2023-11-06 21:15:26,585 INFO L125 PetriNetUnfolderBase]: For 82846/82846 co-relation queries the response was YES. [2023-11-06 21:15:26,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53007 conditions, 12449 events. 7283/12449 cut-off events. For 82846/82846 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 91539 event pairs, 1252 based on Foata normal form. 248/11054 useless extension candidates. Maximal degree in co-relation 52937. Up to 5930 conditions per place. [2023-11-06 21:15:26,754 INFO L140 encePairwiseOnDemand]: 310/320 looper letters, 333 selfloop transitions, 103 changer transitions 57/495 dead transitions. [2023-11-06 21:15:26,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 495 transitions, 5432 flow [2023-11-06 21:15:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:15:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 21:15:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3611 transitions. [2023-11-06 21:15:26,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37614583333333335 [2023-11-06 21:15:26,762 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3611 transitions. [2023-11-06 21:15:26,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3611 transitions. [2023-11-06 21:15:26,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:26,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3611 transitions. [2023-11-06 21:15:26,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 120.36666666666666) internal successors, (3611), 30 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states 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 21:15:26,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 320.0) internal successors, (9920), 31 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states 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 21:15:26,780 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 320.0) internal successors, (9920), 31 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states 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 21:15:26,781 INFO L175 Difference]: Start difference. First operand has 211 places, 508 transitions, 6354 flow. Second operand 30 states and 3611 transitions. [2023-11-06 21:15:26,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 495 transitions, 5432 flow [2023-11-06 21:15:27,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 495 transitions, 4980 flow, removed 196 selfloop flow, removed 22 redundant places. [2023-11-06 21:15:27,724 INFO L231 Difference]: Finished difference. Result has 212 places, 285 transitions, 3504 flow [2023-11-06 21:15:27,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3504, PETRI_PLACES=212, PETRI_TRANSITIONS=285} [2023-11-06 21:15:27,725 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 174 predicate places. [2023-11-06 21:15:27,725 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 285 transitions, 3504 flow [2023-11-06 21:15:27,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 112.65517241379311) internal successors, (3267), 29 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states 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 21:15:27,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:27,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:27,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:27,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 21:15:27,926 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:15:27,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:27,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1644626975, now seen corresponding path program 1 times [2023-11-06 21:15:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:27,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382236202] [2023-11-06 21:15:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:27,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:28,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:28,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382236202] [2023-11-06 21:15:28,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382236202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:28,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998149023] [2023-11-06 21:15:28,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:28,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:28,631 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:28,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:15:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:28,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 21:15:28,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:29,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:29,318 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 18 treesize of output 13 [2023-11-06 21:15:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:29,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:29,416 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_597 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_597) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2023-11-06 21:15:29,535 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:29,535 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 48 treesize of output 41 [2023-11-06 21:15:29,540 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 3 [2023-11-06 21:15:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998149023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:30,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:30,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-06 21:15:30,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103564435] [2023-11-06 21:15:30,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:30,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:15:30,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:30,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:15:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=666, Unknown=1, NotChecked=52, Total=812 [2023-11-06 21:15:30,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 320 [2023-11-06 21:15:30,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 285 transitions, 3504 flow. Second operand has 29 states, 29 states have (on average 113.65517241379311) internal successors, (3296), 29 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 21:15:30,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:30,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 320 [2023-11-06 21:15:30,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:36,158 INFO L124 PetriNetUnfolderBase]: 6829/11621 cut-off events. [2023-11-06 21:15:36,158 INFO L125 PetriNetUnfolderBase]: For 70704/70704 co-relation queries the response was YES. [2023-11-06 21:15:36,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49300 conditions, 11621 events. 6829/11621 cut-off events. For 70704/70704 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 80939 event pairs, 2140 based on Foata normal form. 50/10111 useless extension candidates. Maximal degree in co-relation 49232. Up to 3546 conditions per place. [2023-11-06 21:15:36,300 INFO L140 encePairwiseOnDemand]: 304/320 looper letters, 320 selfloop transitions, 146 changer transitions 15/483 dead transitions. [2023-11-06 21:15:36,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 483 transitions, 5142 flow [2023-11-06 21:15:36,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:15:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 21:15:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3648 transitions. [2023-11-06 21:15:36,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2023-11-06 21:15:36,307 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3648 transitions. [2023-11-06 21:15:36,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3648 transitions. [2023-11-06 21:15:36,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:36,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3648 transitions. [2023-11-06 21:15:36,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 121.6) internal successors, (3648), 30 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states 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 21:15:36,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 320.0) internal successors, (9920), 31 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states 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 21:15:36,327 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 320.0) internal successors, (9920), 31 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states 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 21:15:36,327 INFO L175 Difference]: Start difference. First operand has 212 places, 285 transitions, 3504 flow. Second operand 30 states and 3648 transitions. [2023-11-06 21:15:36,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 483 transitions, 5142 flow [2023-11-06 21:15:37,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 483 transitions, 4942 flow, removed 42 selfloop flow, removed 22 redundant places. [2023-11-06 21:15:37,238 INFO L231 Difference]: Finished difference. Result has 217 places, 294 transitions, 3792 flow [2023-11-06 21:15:37,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3792, PETRI_PLACES=217, PETRI_TRANSITIONS=294} [2023-11-06 21:15:37,239 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 179 predicate places. [2023-11-06 21:15:37,239 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 294 transitions, 3792 flow [2023-11-06 21:15:37,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 113.65517241379311) internal successors, (3296), 29 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 21:15:37,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:37,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:37,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:37,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 21:15:37,440 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:15:37,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1644626973, now seen corresponding path program 3 times [2023-11-06 21:15:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:37,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583842118] [2023-11-06 21:15:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:37,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:38,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583842118] [2023-11-06 21:15:38,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583842118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:38,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355587653] [2023-11-06 21:15:38,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:15:38,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:38,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:38,305 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:38,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:15:38,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:15:38,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:38,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:15:38,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:38,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:38,889 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 32 treesize of output 25 [2023-11-06 21:15:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:15:38,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:39,006 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_634 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_634) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0) 2147483648)) is different from false [2023-11-06 21:15:39,091 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_634 (Array Int Int))) (< (let ((.cse0 (* c_~front~0 4))) (+ c_~d~0 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_634) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)))) 2147483648)) is different from false [2023-11-06 21:15:39,202 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:39,203 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 79 treesize of output 73 [2023-11-06 21:15:39,213 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 17 treesize of output 10 [2023-11-06 21:15:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-06 21:15:39,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355587653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:39,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:39,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2023-11-06 21:15:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566308183] [2023-11-06 21:15:39,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:39,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:15:39,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:15:39,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=479, Unknown=6, NotChecked=90, Total=650 [2023-11-06 21:15:39,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 320 [2023-11-06 21:15:39,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 294 transitions, 3792 flow. Second operand has 26 states, 26 states have (on average 112.8076923076923) internal successors, (2933), 26 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states 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 21:15:39,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:39,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 320 [2023-11-06 21:15:39,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:43,657 INFO L124 PetriNetUnfolderBase]: 7526/12844 cut-off events. [2023-11-06 21:15:43,657 INFO L125 PetriNetUnfolderBase]: For 87320/87356 co-relation queries the response was YES. [2023-11-06 21:15:43,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63094 conditions, 12844 events. 7526/12844 cut-off events. For 87320/87356 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 90957 event pairs, 2449 based on Foata normal form. 120/11263 useless extension candidates. Maximal degree in co-relation 63027. Up to 8324 conditions per place. [2023-11-06 21:15:43,819 INFO L140 encePairwiseOnDemand]: 311/320 looper letters, 317 selfloop transitions, 70 changer transitions 26/415 dead transitions. [2023-11-06 21:15:43,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 415 transitions, 5602 flow [2023-11-06 21:15:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:15:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 21:15:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1925 transitions. [2023-11-06 21:15:43,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3759765625 [2023-11-06 21:15:43,823 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1925 transitions. [2023-11-06 21:15:43,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1925 transitions. [2023-11-06 21:15:43,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:43,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1925 transitions. [2023-11-06 21:15:43,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 120.3125) internal successors, (1925), 16 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states 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 21:15:43,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 320.0) internal successors, (5440), 17 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states 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 21:15:43,833 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 320.0) internal successors, (5440), 17 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states 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 21:15:43,833 INFO L175 Difference]: Start difference. First operand has 217 places, 294 transitions, 3792 flow. Second operand 16 states and 1925 transitions. [2023-11-06 21:15:43,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 415 transitions, 5602 flow [2023-11-06 21:15:44,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 415 transitions, 5458 flow, removed 53 selfloop flow, removed 7 redundant places. [2023-11-06 21:15:44,675 INFO L231 Difference]: Finished difference. Result has 233 places, 303 transitions, 4066 flow [2023-11-06 21:15:44,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4066, PETRI_PLACES=233, PETRI_TRANSITIONS=303} [2023-11-06 21:15:44,676 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 195 predicate places. [2023-11-06 21:15:44,676 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 303 transitions, 4066 flow [2023-11-06 21:15:44,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 112.8076923076923) internal successors, (2933), 26 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states 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 21:15:44,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:44,677 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:44,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:44,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 21:15:44,878 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:15:44,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:44,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1139783807, now seen corresponding path program 5 times [2023-11-06 21:15:44,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:44,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109060130] [2023-11-06 21:15:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:44,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:45,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:45,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109060130] [2023-11-06 21:15:45,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109060130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564257982] [2023-11-06 21:15:45,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:15:45,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:45,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:45,651 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:45,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:15:45,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 21:15:45,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:45,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 21:15:45,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:15:45,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:46,021 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:46,022 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 27 treesize of output 19 [2023-11-06 21:15:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:15:46,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564257982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:46,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:46,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 17 [2023-11-06 21:15:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988226977] [2023-11-06 21:15:46,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:46,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:15:46,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:15:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:15:46,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 320 [2023-11-06 21:15:46,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 303 transitions, 4066 flow. Second operand has 19 states, 19 states have (on average 133.89473684210526) internal successors, (2544), 19 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states 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 21:15:46,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:46,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 320 [2023-11-06 21:15:46,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:51,060 INFO L124 PetriNetUnfolderBase]: 8951/15036 cut-off events. [2023-11-06 21:15:51,060 INFO L125 PetriNetUnfolderBase]: For 121426/121426 co-relation queries the response was YES. [2023-11-06 21:15:51,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76608 conditions, 15036 events. 8951/15036 cut-off events. For 121426/121426 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 106838 event pairs, 1803 based on Foata normal form. 352/13354 useless extension candidates. Maximal degree in co-relation 76532. Up to 8265 conditions per place. [2023-11-06 21:15:51,256 INFO L140 encePairwiseOnDemand]: 310/320 looper letters, 314 selfloop transitions, 190 changer transitions 12/518 dead transitions. [2023-11-06 21:15:51,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 518 transitions, 7174 flow [2023-11-06 21:15:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:15:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 21:15:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2558 transitions. [2023-11-06 21:15:51,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440972222222222 [2023-11-06 21:15:51,260 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2558 transitions. [2023-11-06 21:15:51,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2558 transitions. [2023-11-06 21:15:51,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:51,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2558 transitions. [2023-11-06 21:15:51,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 142.11111111111111) internal successors, (2558), 18 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states 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 21:15:51,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 320.0) internal successors, (6080), 19 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states 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 21:15:51,270 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 320.0) internal successors, (6080), 19 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states 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 21:15:51,270 INFO L175 Difference]: Start difference. First operand has 233 places, 303 transitions, 4066 flow. Second operand 18 states and 2558 transitions. [2023-11-06 21:15:51,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 518 transitions, 7174 flow [2023-11-06 21:15:52,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 518 transitions, 7048 flow, removed 48 selfloop flow, removed 6 redundant places. [2023-11-06 21:15:52,132 INFO L231 Difference]: Finished difference. Result has 247 places, 375 transitions, 5634 flow [2023-11-06 21:15:52,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5634, PETRI_PLACES=247, PETRI_TRANSITIONS=375} [2023-11-06 21:15:52,134 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 209 predicate places. [2023-11-06 21:15:52,134 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 375 transitions, 5634 flow [2023-11-06 21:15:52,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 133.89473684210526) internal successors, (2544), 19 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states 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 21:15:52,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:52,135 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:52,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:52,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 21:15:52,464 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:15:52,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:52,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1184643287, now seen corresponding path program 6 times [2023-11-06 21:15:52,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:52,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505379389] [2023-11-06 21:15:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:52,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:53,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:53,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505379389] [2023-11-06 21:15:53,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505379389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:53,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830159798] [2023-11-06 21:15:53,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:15:53,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:53,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:53,321 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:53,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 21:15:53,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:15:53,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:53,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 21:15:53,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:15:53,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:53,776 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 21:15:53,777 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 27 treesize of output 15 [2023-11-06 21:15:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:15:53,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830159798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:53,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:53,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-11-06 21:15:53,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16674225] [2023-11-06 21:15:53,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:53,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:15:53,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:53,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:15:53,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:15:54,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 320 [2023-11-06 21:15:54,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 375 transitions, 5634 flow. Second operand has 19 states, 19 states have (on average 133.78947368421052) internal successors, (2542), 19 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states 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 21:15:54,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:54,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 320 [2023-11-06 21:15:54,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:01,024 INFO L124 PetriNetUnfolderBase]: 10708/18033 cut-off events. [2023-11-06 21:16:01,024 INFO L125 PetriNetUnfolderBase]: For 190227/190227 co-relation queries the response was YES. [2023-11-06 21:16:01,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96587 conditions, 18033 events. 10708/18033 cut-off events. For 190227/190227 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 133371 event pairs, 1649 based on Foata normal form. 179/15902 useless extension candidates. Maximal degree in co-relation 96506. Up to 9670 conditions per place. [2023-11-06 21:16:01,243 INFO L140 encePairwiseOnDemand]: 310/320 looper letters, 292 selfloop transitions, 290 changer transitions 12/596 dead transitions. [2023-11-06 21:16:01,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 596 transitions, 9080 flow [2023-11-06 21:16:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:16:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 21:16:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3134 transitions. [2023-11-06 21:16:01,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44517045454545456 [2023-11-06 21:16:01,247 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3134 transitions. [2023-11-06 21:16:01,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3134 transitions. [2023-11-06 21:16:01,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:01,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3134 transitions. [2023-11-06 21:16:01,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 142.45454545454547) internal successors, (3134), 22 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states 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 21:16:01,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 320.0) internal successors, (7360), 23 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states 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 21:16:01,259 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 320.0) internal successors, (7360), 23 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states 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 21:16:01,259 INFO L175 Difference]: Start difference. First operand has 247 places, 375 transitions, 5634 flow. Second operand 22 states and 3134 transitions. [2023-11-06 21:16:01,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 596 transitions, 9080 flow [2023-11-06 21:16:03,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 596 transitions, 8488 flow, removed 179 selfloop flow, removed 9 redundant places. [2023-11-06 21:16:03,155 INFO L231 Difference]: Finished difference. Result has 267 places, 432 transitions, 7229 flow [2023-11-06 21:16:03,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=5042, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7229, PETRI_PLACES=267, PETRI_TRANSITIONS=432} [2023-11-06 21:16:03,156 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 229 predicate places. [2023-11-06 21:16:03,156 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 432 transitions, 7229 flow [2023-11-06 21:16:03,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 133.78947368421052) internal successors, (2542), 19 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states 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 21:16:03,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:03,157 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:03,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:03,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:03,359 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:16:03,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1205804296, now seen corresponding path program 2 times [2023-11-06 21:16:03,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:03,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739771943] [2023-11-06 21:16:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:03,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:04,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:04,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739771943] [2023-11-06 21:16:04,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739771943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:04,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188409581] [2023-11-06 21:16:04,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:16:04,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:04,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:04,328 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:04,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 21:16:04,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:16:04,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:04,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 21:16:04,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:04,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:16:04,845 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 21:16:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:05,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:05,710 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:05,710 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 98 treesize of output 100 [2023-11-06 21:16:05,735 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:05,736 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 49 treesize of output 47 [2023-11-06 21:16:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:06,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188409581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:06,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:06,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-06 21:16:06,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415708907] [2023-11-06 21:16:06,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:06,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:16:06,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:06,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:16:06,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=682, Unknown=1, NotChecked=0, Total=812 [2023-11-06 21:16:07,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 320 [2023-11-06 21:16:07,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 432 transitions, 7229 flow. Second operand has 29 states, 29 states have (on average 112.55172413793103) internal successors, (3264), 29 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states 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 21:16:07,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:07,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 320 [2023-11-06 21:16:07,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:10,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:16:17,799 INFO L124 PetriNetUnfolderBase]: 11025/18470 cut-off events. [2023-11-06 21:16:17,799 INFO L125 PetriNetUnfolderBase]: For 190569/190569 co-relation queries the response was YES. [2023-11-06 21:16:18,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104257 conditions, 18470 events. 11025/18470 cut-off events. For 190569/190569 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 136420 event pairs, 5788 based on Foata normal form. 9/16149 useless extension candidates. Maximal degree in co-relation 104169. Up to 15903 conditions per place. [2023-11-06 21:16:18,093 INFO L140 encePairwiseOnDemand]: 310/320 looper letters, 451 selfloop transitions, 85 changer transitions 11/549 dead transitions. [2023-11-06 21:16:18,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 549 transitions, 9254 flow [2023-11-06 21:16:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:16:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 21:16:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3052 transitions. [2023-11-06 21:16:18,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36682692307692305 [2023-11-06 21:16:18,099 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3052 transitions. [2023-11-06 21:16:18,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3052 transitions. [2023-11-06 21:16:18,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:18,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3052 transitions. [2023-11-06 21:16:18,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 117.38461538461539) internal successors, (3052), 26 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states 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 21:16:18,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 320.0) internal successors, (8640), 27 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states 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 21:16:18,117 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 320.0) internal successors, (8640), 27 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states 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 21:16:18,118 INFO L175 Difference]: Start difference. First operand has 267 places, 432 transitions, 7229 flow. Second operand 26 states and 3052 transitions. [2023-11-06 21:16:18,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 549 transitions, 9254 flow [2023-11-06 21:16:22,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 549 transitions, 8416 flow, removed 388 selfloop flow, removed 10 redundant places. [2023-11-06 21:16:22,551 INFO L231 Difference]: Finished difference. Result has 284 places, 454 transitions, 7130 flow [2023-11-06 21:16:22,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=6526, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7130, PETRI_PLACES=284, PETRI_TRANSITIONS=454} [2023-11-06 21:16:22,552 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 246 predicate places. [2023-11-06 21:16:22,553 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 454 transitions, 7130 flow [2023-11-06 21:16:22,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 112.55172413793103) internal successors, (3264), 29 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states 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 21:16:22,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:22,553 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:22,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:22,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 21:16:22,754 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:16:22,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:22,755 INFO L85 PathProgramCache]: Analyzing trace with hash -599224174, now seen corresponding path program 7 times [2023-11-06 21:16:22,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:22,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10716557] [2023-11-06 21:16:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:22,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:23,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:23,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10716557] [2023-11-06 21:16:23,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10716557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:23,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553230076] [2023-11-06 21:16:23,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:16:23,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:23,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:23,477 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:23,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 21:16:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:23,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 21:16:23,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:24,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:16:24,012 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 29 treesize of output 22 [2023-11-06 21:16:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:24,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:24,653 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:24,658 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 79 treesize of output 81 [2023-11-06 21:16:24,718 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:16:24,718 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 20 treesize of output 7 [2023-11-06 21:16:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:25,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553230076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:25,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:25,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-06 21:16:25,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262535136] [2023-11-06 21:16:25,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:25,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:16:25,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:16:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=703, Unknown=1, NotChecked=0, Total=812 [2023-11-06 21:16:27,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:16:30,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:16:32,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:16:34,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:16:37,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:16:39,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:16:39,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 320 [2023-11-06 21:16:39,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 454 transitions, 7130 flow. Second operand has 29 states, 29 states have (on average 112.55172413793103) internal successors, (3264), 29 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states 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 21:16:39,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:39,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 320 [2023-11-06 21:16:39,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:42,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:16:44,719 WARN L539 Checker$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 21:16:50,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:16:55,000 INFO L124 PetriNetUnfolderBase]: 11222/18720 cut-off events. [2023-11-06 21:16:55,000 INFO L125 PetriNetUnfolderBase]: For 158837/158837 co-relation queries the response was YES. [2023-11-06 21:16:55,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102817 conditions, 18720 events. 11222/18720 cut-off events. For 158837/158837 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 137504 event pairs, 3113 based on Foata normal form. 6/16255 useless extension candidates. Maximal degree in co-relation 102725. Up to 13363 conditions per place. [2023-11-06 21:16:55,506 INFO L140 encePairwiseOnDemand]: 310/320 looper letters, 485 selfloop transitions, 117 changer transitions 12/616 dead transitions. [2023-11-06 21:16:55,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 616 transitions, 9403 flow [2023-11-06 21:16:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 21:16:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 21:16:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3907 transitions. [2023-11-06 21:16:55,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699810606060606 [2023-11-06 21:16:55,513 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3907 transitions. [2023-11-06 21:16:55,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3907 transitions. [2023-11-06 21:16:55,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:55,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3907 transitions. [2023-11-06 21:16:55,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 118.39393939393939) internal successors, (3907), 33 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states 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 21:16:55,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 320.0) internal successors, (10880), 34 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states 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 21:16:55,535 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 320.0) internal successors, (10880), 34 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states 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 21:16:55,536 INFO L175 Difference]: Start difference. First operand has 284 places, 454 transitions, 7130 flow. Second operand 33 states and 3907 transitions. [2023-11-06 21:16:55,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 616 transitions, 9403 flow [2023-11-06 21:16:58,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 616 transitions, 9173 flow, removed 67 selfloop flow, removed 17 redundant places. [2023-11-06 21:16:58,252 INFO L231 Difference]: Finished difference. Result has 301 places, 466 transitions, 7475 flow [2023-11-06 21:16:58,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=6875, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7475, PETRI_PLACES=301, PETRI_TRANSITIONS=466} [2023-11-06 21:16:58,253 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 263 predicate places. [2023-11-06 21:16:58,253 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 466 transitions, 7475 flow [2023-11-06 21:16:58,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 112.55172413793103) internal successors, (3264), 29 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states 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 21:16:58,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:58,254 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:58,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-06 21:16:58,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:58,455 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:16:58,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:58,455 INFO L85 PathProgramCache]: Analyzing trace with hash -405821248, now seen corresponding path program 4 times [2023-11-06 21:16:58,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:58,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946566311] [2023-11-06 21:16:58,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:58,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:00,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:00,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946566311] [2023-11-06 21:17:00,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946566311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:00,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485573141] [2023-11-06 21:17:00,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:17:00,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:00,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:00,043 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:00,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 21:17:00,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:17:00,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:00,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:17:00,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:00,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:17:00,676 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 32 treesize of output 25 [2023-11-06 21:17:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:17:00,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:01,107 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:17:01,107 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 79 treesize of output 73 [2023-11-06 21:17:01,116 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 17 treesize of output 10 [2023-11-06 21:17:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:17:01,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485573141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:01,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:01,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2023-11-06 21:17:01,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861002243] [2023-11-06 21:17:01,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:01,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 21:17:01,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 21:17:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=665, Unknown=2, NotChecked=0, Total=756 [2023-11-06 21:17:02,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 320 [2023-11-06 21:17:02,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 466 transitions, 7475 flow. Second operand has 28 states, 28 states have (on average 112.75) internal successors, (3157), 28 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states 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 21:17:02,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:17:02,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 320 [2023-11-06 21:17:02,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:17:06,591 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 21:17:10,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:17:12,859 WARN L539 Checker$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 21:17:15,252 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 21:17:22,338 INFO L124 PetriNetUnfolderBase]: 16087/26330 cut-off events. [2023-11-06 21:17:22,339 INFO L125 PetriNetUnfolderBase]: For 304570/304570 co-relation queries the response was YES. [2023-11-06 21:17:22,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151047 conditions, 26330 events. 16087/26330 cut-off events. For 304570/304570 co-relation queries the response was YES. Maximal size of possible extension queue 1171. Compared 199855 event pairs, 4328 based on Foata normal form. 470/23523 useless extension candidates. Maximal degree in co-relation 150950. Up to 14350 conditions per place. [2023-11-06 21:17:23,028 INFO L140 encePairwiseOnDemand]: 307/320 looper letters, 538 selfloop transitions, 337 changer transitions 24/901 dead transitions. [2023-11-06 21:17:23,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 901 transitions, 14635 flow [2023-11-06 21:17:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 21:17:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 21:17:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3492 transitions. [2023-11-06 21:17:23,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3762931034482759 [2023-11-06 21:17:23,033 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3492 transitions. [2023-11-06 21:17:23,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3492 transitions. [2023-11-06 21:17:23,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:17:23,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3492 transitions. [2023-11-06 21:17:23,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 120.41379310344827) internal successors, (3492), 29 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states 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 21:17:23,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 320.0) internal successors, (9600), 30 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states 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 21:17:23,050 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 320.0) internal successors, (9600), 30 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states 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 21:17:23,050 INFO L175 Difference]: Start difference. First operand has 301 places, 466 transitions, 7475 flow. Second operand 29 states and 3492 transitions. [2023-11-06 21:17:23,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 901 transitions, 14635 flow [2023-11-06 21:17:28,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 901 transitions, 14345 flow, removed 63 selfloop flow, removed 22 redundant places. [2023-11-06 21:17:28,725 INFO L231 Difference]: Finished difference. Result has 317 places, 693 transitions, 12452 flow [2023-11-06 21:17:28,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=7205, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12452, PETRI_PLACES=317, PETRI_TRANSITIONS=693} [2023-11-06 21:17:28,726 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 279 predicate places. [2023-11-06 21:17:28,727 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 693 transitions, 12452 flow [2023-11-06 21:17:28,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 112.75) internal successors, (3157), 28 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states 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 21:17:28,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:17:28,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:28,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:28,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 21:17:28,935 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-06 21:17:28,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1156386885, now seen corresponding path program 5 times [2023-11-06 21:17:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:28,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927002352] [2023-11-06 21:17:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:30,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:30,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927002352] [2023-11-06 21:17:30,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927002352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:30,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668469346] [2023-11-06 21:17:30,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:17:30,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:30,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:30,115 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:30,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6ee289-c8ed-4e6d-a8ee-585a66d21f31/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 21:17:30,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:17:30,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:30,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 21:17:30,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:30,289 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 54 treesize of output 50 [2023-11-06 21:17:30,716 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 21:17:30,848 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 21:17:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:31,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:31,922 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-06 21:17:31,922 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 404 treesize of output 370 [2023-11-06 21:17:31,948 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:17:31,958 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:17:31,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 96 [2023-11-06 21:17:31,991 INFO L322 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-11-06 21:17:31,991 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 81