./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.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_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/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_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/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_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:02:44,596 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:02:44,719 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:02:44,730 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:02:44,731 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:02:44,768 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:02:44,769 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:02:44,770 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:02:44,771 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:02:44,776 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:02:44,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:02:44,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:02:44,779 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:02:44,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:02:44,781 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:02:44,781 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:02:44,782 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:02:44,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:02:44,783 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:02:44,783 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:02:44,784 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:02:44,784 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:02:44,785 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:02:44,787 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:02:44,787 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:02:44,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:02:44,788 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:02:44,789 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:02:44,789 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:02:44,790 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:02:44,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:44,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:02:44,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:02:44,792 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:02:44,793 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:02:44,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:02:44,793 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:02:44,793 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:02:44,793 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:02:44,794 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:02:44,794 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:02:44,794 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_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2023-11-06 22:02:45,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:02:45,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:02:45,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:02:45,187 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:02:45,188 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:02:45,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2023-11-06 22:02:48,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:02:48,537 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:02:48,538 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2023-11-06 22:02:48,546 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/data/98bdfc09c/ac39a6f8f75a46038d1cfd99f7511ce2/FLAGf73120619 [2023-11-06 22:02:48,562 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/data/98bdfc09c/ac39a6f8f75a46038d1cfd99f7511ce2 [2023-11-06 22:02:48,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:02:48,567 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:02:48,568 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:48,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:02:48,574 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:02:48,575 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,576 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@426d19b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48, skipping insertion in model container [2023-11-06 22:02:48,576 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,605 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:02:48,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:48,846 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:02:48,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:48,887 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:02:48,887 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:02:48,894 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:02:48,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48 WrapperNode [2023-11-06 22:02:48,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:48,896 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:02:48,896 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:02:48,896 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:02:48,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,914 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,951 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 276 [2023-11-06 22:02:48,951 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:02:48,952 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:02:48,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:02:48,952 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:02:48,964 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,973 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,973 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,985 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,996 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:49,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:49,005 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:02:49,006 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:02:49,007 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:02:49,007 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:02:49,018 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:49,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:49,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:49,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:02:49,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:02:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:02:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:02:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:02:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:02:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:02:49,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:02:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:02:49,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:02:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:02:49,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:02:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:02:49,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:02:49,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:02:49,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:02:49,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:02:49,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:02:49,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:02:49,093 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:02:49,235 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:02:49,237 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:02:49,770 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:02:49,992 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:02:49,993 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 22:02:49,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:49 BoogieIcfgContainer [2023-11-06 22:02:49,997 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:02:50,000 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:02:50,000 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:02:50,003 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:02:50,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:02:48" (1/3) ... [2023-11-06 22:02:50,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5226da13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:50, skipping insertion in model container [2023-11-06 22:02:50,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (2/3) ... [2023-11-06 22:02:50,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5226da13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:50, skipping insertion in model container [2023-11-06 22:02:50,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:49" (3/3) ... [2023-11-06 22:02:50,010 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-11-06 22:02:50,019 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:02:50,030 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:02:50,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-06 22:02:50,030 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:02:50,151 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:02:50,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 249 transitions, 519 flow [2023-11-06 22:02:50,354 INFO L124 PetriNetUnfolderBase]: 18/246 cut-off events. [2023-11-06 22:02:50,354 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:02:50,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 246 events. 18/246 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 226 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 200. Up to 3 conditions per place. [2023-11-06 22:02:50,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 249 transitions, 519 flow [2023-11-06 22:02:50,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 222 transitions, 459 flow [2023-11-06 22:02:50,381 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:02:50,395 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 222 transitions, 459 flow [2023-11-06 22:02:50,398 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 222 transitions, 459 flow [2023-11-06 22:02:50,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 222 transitions, 459 flow [2023-11-06 22:02:50,471 INFO L124 PetriNetUnfolderBase]: 17/222 cut-off events. [2023-11-06 22:02:50,472 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:02:50,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 222 events. 17/222 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 200. Up to 3 conditions per place. [2023-11-06 22:02:50,491 INFO L119 LiptonReduction]: Number of co-enabled transitions 3352 [2023-11-06 22:03:00,450 INFO L134 LiptonReduction]: Checked pairs total: 6344 [2023-11-06 22:03:00,451 INFO L136 LiptonReduction]: Total number of compositions: 240 [2023-11-06 22:03:00,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:03:00,474 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;@1e4bbf4b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:03:00,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-06 22:03:00,477 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:03:00,477 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:03:00,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:03:00,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:00,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:03:00,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:00,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash 36514, now seen corresponding path program 1 times [2023-11-06 22:03:00,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:00,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794593749] [2023-11-06 22:03:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:00,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:00,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:00,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794593749] [2023-11-06 22:03:00,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794593749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:00,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:00,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:03:00,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093743270] [2023-11-06 22:03:00,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:00,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:00,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:00,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:00,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:00,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 489 [2023-11-06 22:03:00,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:00,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:00,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 489 [2023-11-06 22:03:00,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:01,791 INFO L124 PetriNetUnfolderBase]: 3113/4028 cut-off events. [2023-11-06 22:03:01,791 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-06 22:03:01,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8215 conditions, 4028 events. 3113/4028 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 17826 event pairs, 1668 based on Foata normal form. 0/1317 useless extension candidates. Maximal degree in co-relation 7334. Up to 3998 conditions per place. [2023-11-06 22:03:01,832 INFO L140 encePairwiseOnDemand]: 474/489 looper letters, 36 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-11-06 22:03:01,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 185 flow [2023-11-06 22:03:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 663 transitions. [2023-11-06 22:03:01,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45194274028629855 [2023-11-06 22:03:01,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 663 transitions. [2023-11-06 22:03:01,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 663 transitions. [2023-11-06 22:03:01,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:01,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 663 transitions. [2023-11-06 22:03:01,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:01,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:01,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:01,880 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 107 flow. Second operand 3 states and 663 transitions. [2023-11-06 22:03:01,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 185 flow [2023-11-06 22:03:01,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-06 22:03:01,892 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 130 flow [2023-11-06 22:03:01,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-11-06 22:03:01,899 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-11-06 22:03:01,899 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 130 flow [2023-11-06 22:03:01,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:01,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:01,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:03:01,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:03:01,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:01,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:01,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1133046, now seen corresponding path program 1 times [2023-11-06 22:03:01,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:01,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136197334] [2023-11-06 22:03:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:01,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:02,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:02,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136197334] [2023-11-06 22:03:02,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136197334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:02,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640975723] [2023-11-06 22:03:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:02,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:02,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:02,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:02,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:03:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:02,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:03:02,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:02,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:02,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640975723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:02,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:02,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-06 22:03:02,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987990748] [2023-11-06 22:03:02,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:02,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:03:02,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:03:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:03:02,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 489 [2023-11-06 22:03:02,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 130 flow. Second operand has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:02,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:02,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 489 [2023-11-06 22:03:02,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:03,218 INFO L124 PetriNetUnfolderBase]: 3125/4046 cut-off events. [2023-11-06 22:03:03,218 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-06 22:03:03,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8227 conditions, 4046 events. 3125/4046 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 17934 event pairs, 1668 based on Foata normal form. 0/1328 useless extension candidates. Maximal degree in co-relation 8122. Up to 3999 conditions per place. [2023-11-06 22:03:03,257 INFO L140 encePairwiseOnDemand]: 480/489 looper letters, 34 selfloop transitions, 25 changer transitions 0/62 dead transitions. [2023-11-06 22:03:03,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 326 flow [2023-11-06 22:03:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:03:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:03:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1289 transitions. [2023-11-06 22:03:03,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393319700068166 [2023-11-06 22:03:03,271 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1289 transitions. [2023-11-06 22:03:03,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1289 transitions. [2023-11-06 22:03:03,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:03,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1289 transitions. [2023-11-06 22:03:03,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.83333333333334) internal successors, (1289), 6 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:03,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:03,287 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:03,287 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 130 flow. Second operand 6 states and 1289 transitions. [2023-11-06 22:03:03,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 326 flow [2023-11-06 22:03:03,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:03,291 INFO L231 Difference]: Finished difference. Result has 50 places, 62 transitions, 284 flow [2023-11-06 22:03:03,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=50, PETRI_TRANSITIONS=62} [2023-11-06 22:03:03,292 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-06 22:03:03,292 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 62 transitions, 284 flow [2023-11-06 22:03:03,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:03,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:03,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-06 22:03:03,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:03,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:03,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:03,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash 35125540, now seen corresponding path program 1 times [2023-11-06 22:03:03,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:03,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763022485] [2023-11-06 22:03:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:03,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:03,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763022485] [2023-11-06 22:03:03,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763022485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:03,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930348836] [2023-11-06 22:03:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:03,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:03,649 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:03,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:03:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:03,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:03:03,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:03,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:03,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930348836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:03,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:03,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-06 22:03:03,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205135189] [2023-11-06 22:03:03,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:03,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:03:03,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:03,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:03:03,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:03:03,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 489 [2023-11-06 22:03:03,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 204.8) internal successors, (1024), 5 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:03,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:03,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 489 [2023-11-06 22:03:03,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:04,449 INFO L124 PetriNetUnfolderBase]: 3119/4038 cut-off events. [2023-11-06 22:03:04,450 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-06 22:03:04,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8236 conditions, 4038 events. 3119/4038 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 17930 event pairs, 1668 based on Foata normal form. 0/1331 useless extension candidates. Maximal degree in co-relation 8171. Up to 3993 conditions per place. [2023-11-06 22:03:04,493 INFO L140 encePairwiseOnDemand]: 482/489 looper letters, 37 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-11-06 22:03:04,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 54 transitions, 332 flow [2023-11-06 22:03:04,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:03:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:03:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1067 transitions. [2023-11-06 22:03:04,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43640081799591 [2023-11-06 22:03:04,498 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1067 transitions. [2023-11-06 22:03:04,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1067 transitions. [2023-11-06 22:03:04,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:04,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1067 transitions. [2023-11-06 22:03:04,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.4) internal successors, (1067), 5 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:04,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 489.0) internal successors, (2934), 6 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:04,512 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 489.0) internal successors, (2934), 6 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:04,512 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 284 flow. Second operand 5 states and 1067 transitions. [2023-11-06 22:03:04,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 54 transitions, 332 flow [2023-11-06 22:03:04,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 306 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 22:03:04,521 INFO L231 Difference]: Finished difference. Result has 51 places, 54 transitions, 232 flow [2023-11-06 22:03:04,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=51, PETRI_TRANSITIONS=54} [2023-11-06 22:03:04,523 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-11-06 22:03:04,524 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 54 transitions, 232 flow [2023-11-06 22:03:04,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 204.8) internal successors, (1024), 5 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:04,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:04,525 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:03:04,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:04,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:04,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:04,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash -604060766, now seen corresponding path program 2 times [2023-11-06 22:03:04,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:04,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813963804] [2023-11-06 22:03:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:04,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:04,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:04,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813963804] [2023-11-06 22:03:04,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813963804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:04,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513373202] [2023-11-06 22:03:04,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:03:04,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:04,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:04,840 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:04,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:03:04,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:03:04,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:04,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:03:04,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:03:04,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:04,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513373202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:04,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:04,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-06 22:03:04,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300242613] [2023-11-06 22:03:04,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:04,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:04,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:04,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:03:04,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 489 [2023-11-06 22:03:04,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 54 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:04,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:04,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 489 [2023-11-06 22:03:04,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:05,565 INFO L124 PetriNetUnfolderBase]: 3119/4037 cut-off events. [2023-11-06 22:03:05,565 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-06 22:03:05,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8231 conditions, 4037 events. 3119/4037 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 17899 event pairs, 1668 based on Foata normal form. 1/1335 useless extension candidates. Maximal degree in co-relation 8174. Up to 4004 conditions per place. [2023-11-06 22:03:05,597 INFO L140 encePairwiseOnDemand]: 486/489 looper letters, 44 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2023-11-06 22:03:05,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 322 flow [2023-11-06 22:03:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-11-06 22:03:05,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492160872528971 [2023-11-06 22:03:05,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-11-06 22:03:05,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-11-06 22:03:05,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:05,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-11-06 22:03:05,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:05,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:05,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:05,609 INFO L175 Difference]: Start difference. First operand has 51 places, 54 transitions, 232 flow. Second operand 3 states and 659 transitions. [2023-11-06 22:03:05,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 322 flow [2023-11-06 22:03:05,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 302 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:03:05,612 INFO L231 Difference]: Finished difference. Result has 49 places, 53 transitions, 214 flow [2023-11-06 22:03:05,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=49, PETRI_TRANSITIONS=53} [2023-11-06 22:03:05,613 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-11-06 22:03:05,614 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 53 transitions, 214 flow [2023-11-06 22:03:05,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:05,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:05,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:03:05,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:05,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:05,821 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:05,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:05,821 INFO L85 PathProgramCache]: Analyzing trace with hash -577853202, now seen corresponding path program 1 times [2023-11-06 22:03:05,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:05,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134340042] [2023-11-06 22:03:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:05,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:05,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134340042] [2023-11-06 22:03:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134340042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:05,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:05,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202813130] [2023-11-06 22:03:05,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:05,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:05,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:05,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 489 [2023-11-06 22:03:05,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 53 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:05,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:05,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 489 [2023-11-06 22:03:05,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:06,625 INFO L124 PetriNetUnfolderBase]: 3505/4651 cut-off events. [2023-11-06 22:03:06,625 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-11-06 22:03:06,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9490 conditions, 4651 events. 3505/4651 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 21997 event pairs, 980 based on Foata normal form. 0/1733 useless extension candidates. Maximal degree in co-relation 9435. Up to 3699 conditions per place. [2023-11-06 22:03:06,656 INFO L140 encePairwiseOnDemand]: 483/489 looper letters, 68 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-11-06 22:03:06,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 74 transitions, 403 flow [2023-11-06 22:03:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2023-11-06 22:03:06,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4710293115201091 [2023-11-06 22:03:06,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2023-11-06 22:03:06,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2023-11-06 22:03:06,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:06,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2023-11-06 22:03:06,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:06,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:06,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:06,668 INFO L175 Difference]: Start difference. First operand has 49 places, 53 transitions, 214 flow. Second operand 3 states and 691 transitions. [2023-11-06 22:03:06,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 74 transitions, 403 flow [2023-11-06 22:03:06,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:06,672 INFO L231 Difference]: Finished difference. Result has 50 places, 56 transitions, 230 flow [2023-11-06 22:03:06,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=50, PETRI_TRANSITIONS=56} [2023-11-06 22:03:06,675 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-06 22:03:06,675 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 56 transitions, 230 flow [2023-11-06 22:03:06,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:06,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:06,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:03:06,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:03:06,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:06,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:06,677 INFO L85 PathProgramCache]: Analyzing trace with hash -577853197, now seen corresponding path program 1 times [2023-11-06 22:03:06,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:06,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822285848] [2023-11-06 22:03:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:06,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:06,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:06,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822285848] [2023-11-06 22:03:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822285848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:06,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:06,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:06,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199432274] [2023-11-06 22:03:06,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:06,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:03:06,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:06,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:03:06,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:03:06,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 489 [2023-11-06 22:03:06,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 56 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:06,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:06,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 489 [2023-11-06 22:03:06,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:07,531 INFO L124 PetriNetUnfolderBase]: 3129/4187 cut-off events. [2023-11-06 22:03:07,531 INFO L125 PetriNetUnfolderBase]: For 252/375 co-relation queries the response was YES. [2023-11-06 22:03:07,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9772 conditions, 4187 events. 3129/4187 cut-off events. For 252/375 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 19896 event pairs, 1903 based on Foata normal form. 165/1909 useless extension candidates. Maximal degree in co-relation 9692. Up to 4116 conditions per place. [2023-11-06 22:03:07,561 INFO L140 encePairwiseOnDemand]: 480/489 looper letters, 71 selfloop transitions, 3 changer transitions 1/78 dead transitions. [2023-11-06 22:03:07,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 78 transitions, 475 flow [2023-11-06 22:03:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:03:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:03:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 856 transitions. [2023-11-06 22:03:07,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376278118609407 [2023-11-06 22:03:07,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 856 transitions. [2023-11-06 22:03:07,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 856 transitions. [2023-11-06 22:03:07,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:07,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 856 transitions. [2023-11-06 22:03:07,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:07,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:07,574 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:07,574 INFO L175 Difference]: Start difference. First operand has 50 places, 56 transitions, 230 flow. Second operand 4 states and 856 transitions. [2023-11-06 22:03:07,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 78 transitions, 475 flow [2023-11-06 22:03:07,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 78 transitions, 471 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:03:07,580 INFO L231 Difference]: Finished difference. Result has 53 places, 56 transitions, 245 flow [2023-11-06 22:03:07,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=56} [2023-11-06 22:03:07,584 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-06 22:03:07,584 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 56 transitions, 245 flow [2023-11-06 22:03:07,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:07,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:07,585 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:03:07,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:03:07,585 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:07,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash -746305833, now seen corresponding path program 1 times [2023-11-06 22:03:07,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:07,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925033989] [2023-11-06 22:03:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:07,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:07,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925033989] [2023-11-06 22:03:07,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925033989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:07,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52414824] [2023-11-06 22:03:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:07,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:07,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:07,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:07,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:03:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:07,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:03:07,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:07,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:07,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52414824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:07,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:07,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:03:07,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534156135] [2023-11-06 22:03:07,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:07,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:03:07,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:07,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:03:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:03:08,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 489 [2023-11-06 22:03:08,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 245 flow. Second operand has 13 states, 13 states have (on average 205.15384615384616) internal successors, (2667), 13 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:08,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:08,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 489 [2023-11-06 22:03:08,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:08,723 INFO L124 PetriNetUnfolderBase]: 3193/4269 cut-off events. [2023-11-06 22:03:08,723 INFO L125 PetriNetUnfolderBase]: For 861/984 co-relation queries the response was YES. [2023-11-06 22:03:08,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10707 conditions, 4269 events. 3193/4269 cut-off events. For 861/984 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 20464 event pairs, 1924 based on Foata normal form. 135/1897 useless extension candidates. Maximal degree in co-relation 10531. Up to 4204 conditions per place. [2023-11-06 22:03:08,751 INFO L140 encePairwiseOnDemand]: 483/489 looper letters, 36 selfloop transitions, 41 changer transitions 0/80 dead transitions. [2023-11-06 22:03:08,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 549 flow [2023-11-06 22:03:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:03:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:03:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2528 transitions. [2023-11-06 22:03:08,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43081117927743695 [2023-11-06 22:03:08,763 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2528 transitions. [2023-11-06 22:03:08,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2528 transitions. [2023-11-06 22:03:08,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:08,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2528 transitions. [2023-11-06 22:03:08,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 210.66666666666666) internal successors, (2528), 12 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:08,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:08,788 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:08,788 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 245 flow. Second operand 12 states and 2528 transitions. [2023-11-06 22:03:08,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 549 flow [2023-11-06 22:03:08,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 543 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:03:08,792 INFO L231 Difference]: Finished difference. Result has 69 places, 80 transitions, 525 flow [2023-11-06 22:03:08,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=525, PETRI_PLACES=69, PETRI_TRANSITIONS=80} [2023-11-06 22:03:08,793 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2023-11-06 22:03:08,793 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 80 transitions, 525 flow [2023-11-06 22:03:08,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 205.15384615384616) internal successors, (2667), 13 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:08,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:08,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:08,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:09,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:09,001 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:09,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:09,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1519805998, now seen corresponding path program 1 times [2023-11-06 22:03:09,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:09,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229793964] [2023-11-06 22:03:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:09,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229793964] [2023-11-06 22:03:09,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229793964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949760665] [2023-11-06 22:03:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:09,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:09,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:09,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:09,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:03:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:09,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:03:09,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:09,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:09,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949760665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:09,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:09,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-06 22:03:09,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893754169] [2023-11-06 22:03:09,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:09,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:09,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:09,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:09,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:03:09,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 489 [2023-11-06 22:03:09,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 80 transitions, 525 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:09,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:09,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 489 [2023-11-06 22:03:09,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:09,686 INFO L124 PetriNetUnfolderBase]: 1798/2450 cut-off events. [2023-11-06 22:03:09,686 INFO L125 PetriNetUnfolderBase]: For 768/878 co-relation queries the response was YES. [2023-11-06 22:03:09,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6169 conditions, 2450 events. 1798/2450 cut-off events. For 768/878 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 10996 event pairs, 1078 based on Foata normal form. 304/1360 useless extension candidates. Maximal degree in co-relation 6047. Up to 2437 conditions per place. [2023-11-06 22:03:09,704 INFO L140 encePairwiseOnDemand]: 485/489 looper letters, 72 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-11-06 22:03:09,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 653 flow [2023-11-06 22:03:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 670 transitions. [2023-11-06 22:03:09,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567143830947512 [2023-11-06 22:03:09,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 670 transitions. [2023-11-06 22:03:09,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 670 transitions. [2023-11-06 22:03:09,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:09,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 670 transitions. [2023-11-06 22:03:09,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:09,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:09,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:09,716 INFO L175 Difference]: Start difference. First operand has 69 places, 80 transitions, 525 flow. Second operand 3 states and 670 transitions. [2023-11-06 22:03:09,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 653 flow [2023-11-06 22:03:09,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 76 transitions, 527 flow, removed 40 selfloop flow, removed 5 redundant places. [2023-11-06 22:03:09,725 INFO L231 Difference]: Finished difference. Result has 63 places, 76 transitions, 383 flow [2023-11-06 22:03:09,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=383, PETRI_PLACES=63, PETRI_TRANSITIONS=76} [2023-11-06 22:03:09,728 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2023-11-06 22:03:09,728 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 76 transitions, 383 flow [2023-11-06 22:03:09,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:09,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:09,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:09,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:09,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:09,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:09,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:09,935 INFO L85 PathProgramCache]: Analyzing trace with hash 130659872, now seen corresponding path program 1 times [2023-11-06 22:03:09,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:09,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219327919] [2023-11-06 22:03:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:09,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:09,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:09,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219327919] [2023-11-06 22:03:09,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219327919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:09,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:09,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:09,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271177570] [2023-11-06 22:03:10,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:10,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:10,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:10,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:10,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:10,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 489 [2023-11-06 22:03:10,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 76 transitions, 383 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:10,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:10,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 489 [2023-11-06 22:03:10,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:10,426 INFO L124 PetriNetUnfolderBase]: 1859/2525 cut-off events. [2023-11-06 22:03:10,426 INFO L125 PetriNetUnfolderBase]: For 766/766 co-relation queries the response was YES. [2023-11-06 22:03:10,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6168 conditions, 2525 events. 1859/2525 cut-off events. For 766/766 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 10950 event pairs, 586 based on Foata normal form. 0/1298 useless extension candidates. Maximal degree in co-relation 6147. Up to 1330 conditions per place. [2023-11-06 22:03:10,440 INFO L140 encePairwiseOnDemand]: 486/489 looper letters, 86 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-11-06 22:03:10,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 594 flow [2023-11-06 22:03:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 681 transitions. [2023-11-06 22:03:10,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46421267893660534 [2023-11-06 22:03:10,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 681 transitions. [2023-11-06 22:03:10,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 681 transitions. [2023-11-06 22:03:10,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:10,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 681 transitions. [2023-11-06 22:03:10,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:10,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:10,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:10,450 INFO L175 Difference]: Start difference. First operand has 63 places, 76 transitions, 383 flow. Second operand 3 states and 681 transitions. [2023-11-06 22:03:10,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 594 flow [2023-11-06 22:03:10,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 593 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:03:10,455 INFO L231 Difference]: Finished difference. Result has 63 places, 75 transitions, 384 flow [2023-11-06 22:03:10,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=63, PETRI_TRANSITIONS=75} [2023-11-06 22:03:10,456 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2023-11-06 22:03:10,456 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 75 transitions, 384 flow [2023-11-06 22:03:10,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:10,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:10,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:10,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:03:10,457 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:10,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash 130659907, now seen corresponding path program 1 times [2023-11-06 22:03:10,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:10,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754045621] [2023-11-06 22:03:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:10,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:10,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:10,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754045621] [2023-11-06 22:03:10,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754045621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:10,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896026144] [2023-11-06 22:03:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:10,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:10,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:10,533 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:10,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:03:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:10,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:03:10,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:10,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:10,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896026144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:10,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:10,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-11-06 22:03:10,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517683389] [2023-11-06 22:03:10,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:10,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:03:10,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:03:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:03:11,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 489 [2023-11-06 22:03:11,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 75 transitions, 384 flow. Second operand has 11 states, 11 states have (on average 192.9090909090909) internal successors, (2122), 11 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:11,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:11,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 489 [2023-11-06 22:03:11,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:12,133 INFO L124 PetriNetUnfolderBase]: 3377/4653 cut-off events. [2023-11-06 22:03:12,133 INFO L125 PetriNetUnfolderBase]: For 2433/2433 co-relation queries the response was YES. [2023-11-06 22:03:12,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11570 conditions, 4653 events. 3377/4653 cut-off events. For 2433/2433 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 23644 event pairs, 942 based on Foata normal form. 368/2915 useless extension candidates. Maximal degree in co-relation 11549. Up to 2080 conditions per place. [2023-11-06 22:03:12,164 INFO L140 encePairwiseOnDemand]: 478/489 looper letters, 228 selfloop transitions, 22 changer transitions 2/254 dead transitions. [2023-11-06 22:03:12,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 254 transitions, 1530 flow [2023-11-06 22:03:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:03:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:03:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3242 transitions. [2023-11-06 22:03:12,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143660531697341 [2023-11-06 22:03:12,178 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3242 transitions. [2023-11-06 22:03:12,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3242 transitions. [2023-11-06 22:03:12,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:12,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3242 transitions. [2023-11-06 22:03:12,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 202.625) internal successors, (3242), 16 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:12,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:12,223 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:12,224 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 384 flow. Second operand 16 states and 3242 transitions. [2023-11-06 22:03:12,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 254 transitions, 1530 flow [2023-11-06 22:03:12,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 254 transitions, 1514 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:12,235 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 555 flow [2023-11-06 22:03:12,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=555, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2023-11-06 22:03:12,237 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2023-11-06 22:03:12,237 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 555 flow [2023-11-06 22:03:12,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.9090909090909) internal successors, (2122), 11 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:12,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:12,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:12,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:12,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:03:12,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:12,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1770076319, now seen corresponding path program 1 times [2023-11-06 22:03:12,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:12,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622053743] [2023-11-06 22:03:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:12,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:12,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:12,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622053743] [2023-11-06 22:03:12,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622053743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:12,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:12,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:03:12,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986962031] [2023-11-06 22:03:12,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:12,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:12,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:12,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:12,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:12,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 489 [2023-11-06 22:03:12,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 555 flow. Second operand has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:12,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:12,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 489 [2023-11-06 22:03:12,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:13,157 INFO L124 PetriNetUnfolderBase]: 2893/4029 cut-off events. [2023-11-06 22:03:13,157 INFO L125 PetriNetUnfolderBase]: For 4143/4251 co-relation queries the response was YES. [2023-11-06 22:03:13,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11047 conditions, 4029 events. 2893/4029 cut-off events. For 4143/4251 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 18563 event pairs, 364 based on Foata normal form. 159/2035 useless extension candidates. Maximal degree in co-relation 11018. Up to 3609 conditions per place. [2023-11-06 22:03:13,188 INFO L140 encePairwiseOnDemand]: 479/489 looper letters, 94 selfloop transitions, 5 changer transitions 3/107 dead transitions. [2023-11-06 22:03:13,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 107 transitions, 844 flow [2023-11-06 22:03:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 679 transitions. [2023-11-06 22:03:13,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46284935241990455 [2023-11-06 22:03:13,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 679 transitions. [2023-11-06 22:03:13,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 679 transitions. [2023-11-06 22:03:13,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:13,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 679 transitions. [2023-11-06 22:03:13,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:13,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:13,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:13,197 INFO L175 Difference]: Start difference. First operand has 83 places, 89 transitions, 555 flow. Second operand 3 states and 679 transitions. [2023-11-06 22:03:13,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 107 transitions, 844 flow [2023-11-06 22:03:13,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 107 transitions, 805 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:13,209 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 544 flow [2023-11-06 22:03:13,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=544, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2023-11-06 22:03:13,210 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2023-11-06 22:03:13,210 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 544 flow [2023-11-06 22:03:13,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:13,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:13,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:13,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:03:13,211 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:13,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1359393873, now seen corresponding path program 2 times [2023-11-06 22:03:13,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:13,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818713258] [2023-11-06 22:03:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:13,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:13,304 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 22:03:13,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:13,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818713258] [2023-11-06 22:03:13,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818713258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:13,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914722865] [2023-11-06 22:03:13,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:03:13,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:13,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:13,306 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:13,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:03:13,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:03:13,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:13,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:03:13,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:03:13,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:13,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914722865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:13,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:13,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-06 22:03:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267863855] [2023-11-06 22:03:13,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:13,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:13,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:13,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:13,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:03:13,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 489 [2023-11-06 22:03:13,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 544 flow. Second operand has 3 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:13,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:13,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 489 [2023-11-06 22:03:13,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:14,006 INFO L124 PetriNetUnfolderBase]: 2604/3643 cut-off events. [2023-11-06 22:03:14,006 INFO L125 PetriNetUnfolderBase]: For 3287/3392 co-relation queries the response was YES. [2023-11-06 22:03:14,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11651 conditions, 3643 events. 2604/3643 cut-off events. For 3287/3392 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 16798 event pairs, 1105 based on Foata normal form. 104/2132 useless extension candidates. Maximal degree in co-relation 11620. Up to 3617 conditions per place. [2023-11-06 22:03:14,032 INFO L140 encePairwiseOnDemand]: 487/489 looper letters, 83 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-11-06 22:03:14,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 704 flow [2023-11-06 22:03:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2023-11-06 22:03:14,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539877300613497 [2023-11-06 22:03:14,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2023-11-06 22:03:14,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2023-11-06 22:03:14,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:14,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2023-11-06 22:03:14,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,043 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 544 flow. Second operand 3 states and 666 transitions. [2023-11-06 22:03:14,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 704 flow [2023-11-06 22:03:14,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 89 transitions, 699 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:03:14,053 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 533 flow [2023-11-06 22:03:14,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=533, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2023-11-06 22:03:14,055 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2023-11-06 22:03:14,055 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 533 flow [2023-11-06 22:03:14,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:14,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:14,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:14,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:03:14,261 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:14,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1245154689, now seen corresponding path program 1 times [2023-11-06 22:03:14,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:14,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320917201] [2023-11-06 22:03:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:14,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:14,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:14,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320917201] [2023-11-06 22:03:14,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320917201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:14,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:14,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:14,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401569666] [2023-11-06 22:03:14,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:14,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:14,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:14,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:14,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:14,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 489 [2023-11-06 22:03:14,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 533 flow. Second operand has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:14,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 489 [2023-11-06 22:03:14,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:14,753 INFO L124 PetriNetUnfolderBase]: 1849/2595 cut-off events. [2023-11-06 22:03:14,753 INFO L125 PetriNetUnfolderBase]: For 1973/1986 co-relation queries the response was YES. [2023-11-06 22:03:14,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8191 conditions, 2595 events. 1849/2595 cut-off events. For 1973/1986 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 10951 event pairs, 404 based on Foata normal form. 21/1458 useless extension candidates. Maximal degree in co-relation 8159. Up to 2480 conditions per place. [2023-11-06 22:03:14,768 INFO L140 encePairwiseOnDemand]: 485/489 looper letters, 82 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-11-06 22:03:14,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 91 transitions, 705 flow [2023-11-06 22:03:14,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2023-11-06 22:03:14,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546693933197001 [2023-11-06 22:03:14,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2023-11-06 22:03:14,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2023-11-06 22:03:14,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:14,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2023-11-06 22:03:14,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,778 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,779 INFO L175 Difference]: Start difference. First operand has 83 places, 89 transitions, 533 flow. Second operand 3 states and 667 transitions. [2023-11-06 22:03:14,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 91 transitions, 705 flow [2023-11-06 22:03:14,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 91 transitions, 700 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:03:14,787 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 530 flow [2023-11-06 22:03:14,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=530, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-11-06 22:03:14,788 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2023-11-06 22:03:14,789 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 530 flow [2023-11-06 22:03:14,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:14,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:14,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:03:14,790 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:14,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1718165296, now seen corresponding path program 1 times [2023-11-06 22:03:14,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:14,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656789538] [2023-11-06 22:03:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:14,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:14,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:14,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656789538] [2023-11-06 22:03:14,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656789538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:14,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:14,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:03:14,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083574168] [2023-11-06 22:03:14,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:14,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:03:14,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:03:14,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:03:14,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 489 [2023-11-06 22:03:14,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 530 flow. Second operand has 4 states, 4 states have (on average 202.5) internal successors, (810), 4 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:14,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:14,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 489 [2023-11-06 22:03:14,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:15,386 INFO L124 PetriNetUnfolderBase]: 1925/2777 cut-off events. [2023-11-06 22:03:15,386 INFO L125 PetriNetUnfolderBase]: For 2923/2942 co-relation queries the response was YES. [2023-11-06 22:03:15,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8996 conditions, 2777 events. 1925/2777 cut-off events. For 2923/2942 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 12305 event pairs, 747 based on Foata normal form. 67/1672 useless extension candidates. Maximal degree in co-relation 8962. Up to 2575 conditions per place. [2023-11-06 22:03:15,402 INFO L140 encePairwiseOnDemand]: 481/489 looper letters, 68 selfloop transitions, 13 changer transitions 18/103 dead transitions. [2023-11-06 22:03:15,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 103 transitions, 818 flow [2023-11-06 22:03:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:03:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:03:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 847 transitions. [2023-11-06 22:03:15,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330265848670757 [2023-11-06 22:03:15,406 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 847 transitions. [2023-11-06 22:03:15,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 847 transitions. [2023-11-06 22:03:15,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:15,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 847 transitions. [2023-11-06 22:03:15,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.75) internal successors, (847), 4 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:15,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:15,415 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:15,415 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 530 flow. Second operand 4 states and 847 transitions. [2023-11-06 22:03:15,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 103 transitions, 818 flow [2023-11-06 22:03:15,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 103 transitions, 780 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-06 22:03:15,428 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 537 flow [2023-11-06 22:03:15,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=537, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2023-11-06 22:03:15,429 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2023-11-06 22:03:15,429 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 537 flow [2023-11-06 22:03:15,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.5) internal successors, (810), 4 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:15,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:15,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:15,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:03:15,430 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:15,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:15,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1354496610, now seen corresponding path program 1 times [2023-11-06 22:03:15,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:15,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482714483] [2023-11-06 22:03:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:15,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:15,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:15,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482714483] [2023-11-06 22:03:15,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482714483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:15,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826132542] [2023-11-06 22:03:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:15,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:15,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:15,597 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:15,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:03:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:15,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:03:15,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:03:15,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:15,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826132542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:15,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:15,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-06 22:03:15,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259019977] [2023-11-06 22:03:15,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:15,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:15,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:15,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:03:15,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 489 [2023-11-06 22:03:15,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 537 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:15,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:15,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 489 [2023-11-06 22:03:15,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:16,078 INFO L124 PetriNetUnfolderBase]: 1319/1885 cut-off events. [2023-11-06 22:03:16,078 INFO L125 PetriNetUnfolderBase]: For 1223/1231 co-relation queries the response was YES. [2023-11-06 22:03:16,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5995 conditions, 1885 events. 1319/1885 cut-off events. For 1223/1231 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 7632 event pairs, 455 based on Foata normal form. 112/1163 useless extension candidates. Maximal degree in co-relation 5964. Up to 1865 conditions per place. [2023-11-06 22:03:16,087 INFO L140 encePairwiseOnDemand]: 486/489 looper letters, 78 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2023-11-06 22:03:16,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 687 flow [2023-11-06 22:03:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2023-11-06 22:03:16,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45330606680299934 [2023-11-06 22:03:16,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2023-11-06 22:03:16,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2023-11-06 22:03:16,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:16,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2023-11-06 22:03:16,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:16,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:16,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:16,097 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 537 flow. Second operand 3 states and 665 transitions. [2023-11-06 22:03:16,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 687 flow [2023-11-06 22:03:16,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 83 transitions, 650 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-06 22:03:16,106 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 494 flow [2023-11-06 22:03:16,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=494, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2023-11-06 22:03:16,107 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2023-11-06 22:03:16,107 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 494 flow [2023-11-06 22:03:16,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:16,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:16,108 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-06 22:03:16,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:16,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:03:16,313 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:16,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1547719959, now seen corresponding path program 2 times [2023-11-06 22:03:16,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:16,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670296873] [2023-11-06 22:03:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:16,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:16,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:16,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670296873] [2023-11-06 22:03:16,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670296873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:16,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343026915] [2023-11-06 22:03:16,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:03:16,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:16,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:16,579 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:16,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:03:16,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:03:16,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:16,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:03:16,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:03:16,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:16,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343026915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:16,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:16,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-11-06 22:03:16,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700497316] [2023-11-06 22:03:16,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:16,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:03:16,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:16,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:03:16,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:03:16,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 489 [2023-11-06 22:03:16,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 494 flow. Second operand has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:16,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:16,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 489 [2023-11-06 22:03:16,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:17,059 INFO L124 PetriNetUnfolderBase]: 1319/1884 cut-off events. [2023-11-06 22:03:17,059 INFO L125 PetriNetUnfolderBase]: For 1092/1101 co-relation queries the response was YES. [2023-11-06 22:03:17,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5845 conditions, 1884 events. 1319/1884 cut-off events. For 1092/1101 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 7602 event pairs, 455 based on Foata normal form. 12/1064 useless extension candidates. Maximal degree in co-relation 5815. Up to 1806 conditions per place. [2023-11-06 22:03:17,067 INFO L140 encePairwiseOnDemand]: 486/489 looper letters, 63 selfloop transitions, 11 changer transitions 3/81 dead transitions. [2023-11-06 22:03:17,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 599 flow [2023-11-06 22:03:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:03:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:03:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 851 transitions. [2023-11-06 22:03:17,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4350715746421268 [2023-11-06 22:03:17,072 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 851 transitions. [2023-11-06 22:03:17,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 851 transitions. [2023-11-06 22:03:17,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:17,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 851 transitions. [2023-11-06 22:03:17,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.75) internal successors, (851), 4 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:17,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:17,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:17,081 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 494 flow. Second operand 4 states and 851 transitions. [2023-11-06 22:03:17,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 599 flow [2023-11-06 22:03:17,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 515 flow, removed 3 selfloop flow, removed 12 redundant places. [2023-11-06 22:03:17,088 INFO L231 Difference]: Finished difference. Result has 68 places, 78 transitions, 364 flow [2023-11-06 22:03:17,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=68, PETRI_TRANSITIONS=78} [2023-11-06 22:03:17,089 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2023-11-06 22:03:17,089 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 78 transitions, 364 flow [2023-11-06 22:03:17,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:17,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:17,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:17,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:17,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:03:17,302 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:17,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1354496426, now seen corresponding path program 1 times [2023-11-06 22:03:17,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:17,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663808561] [2023-11-06 22:03:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:17,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:18,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663808561] [2023-11-06 22:03:18,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663808561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565797957] [2023-11-06 22:03:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:18,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:18,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:18,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:18,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:03:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:18,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:03:18,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:18,299 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 22:03:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:18,387 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:03:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:18,506 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:03:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:18,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:18,882 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:18,883 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 31 treesize of output 32 [2023-11-06 22:03:18,897 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:18,897 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 173 treesize of output 157 [2023-11-06 22:03:18,917 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 31 treesize of output 25 [2023-11-06 22:03:18,927 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 36 treesize of output 24 [2023-11-06 22:03:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:19,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565797957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:19,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:19,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-11-06 22:03:19,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224060768] [2023-11-06 22:03:19,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:19,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:03:19,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:03:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=254, Unknown=3, NotChecked=0, Total=306 [2023-11-06 22:03:22,154 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 22:03:22,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 489 [2023-11-06 22:03:22,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 78 transitions, 364 flow. Second operand has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:22,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:22,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 489 [2023-11-06 22:03:22,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:23,789 INFO L124 PetriNetUnfolderBase]: 1934/2886 cut-off events. [2023-11-06 22:03:23,789 INFO L125 PetriNetUnfolderBase]: For 1226/1254 co-relation queries the response was YES. [2023-11-06 22:03:23,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8811 conditions, 2886 events. 1934/2886 cut-off events. For 1226/1254 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 13983 event pairs, 423 based on Foata normal form. 28/1742 useless extension candidates. Maximal degree in co-relation 8791. Up to 1582 conditions per place. [2023-11-06 22:03:23,802 INFO L140 encePairwiseOnDemand]: 480/489 looper letters, 113 selfloop transitions, 26 changer transitions 0/142 dead transitions. [2023-11-06 22:03:23,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 142 transitions, 920 flow [2023-11-06 22:03:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:03:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:03:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1585 transitions. [2023-11-06 22:03:23,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32413087934560325 [2023-11-06 22:03:23,809 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1585 transitions. [2023-11-06 22:03:23,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1585 transitions. [2023-11-06 22:03:23,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:23,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1585 transitions. [2023-11-06 22:03:23,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:23,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:23,824 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:23,825 INFO L175 Difference]: Start difference. First operand has 68 places, 78 transitions, 364 flow. Second operand 10 states and 1585 transitions. [2023-11-06 22:03:23,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 142 transitions, 920 flow [2023-11-06 22:03:23,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 142 transitions, 902 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-06 22:03:23,831 INFO L231 Difference]: Finished difference. Result has 72 places, 88 transitions, 455 flow [2023-11-06 22:03:23,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=455, PETRI_PLACES=72, PETRI_TRANSITIONS=88} [2023-11-06 22:03:23,832 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2023-11-06 22:03:23,832 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 88 transitions, 455 flow [2023-11-06 22:03:23,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:23,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:23,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:23,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:24,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:03:24,041 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:24,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:24,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1354496524, now seen corresponding path program 1 times [2023-11-06 22:03:24,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:24,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981171468] [2023-11-06 22:03:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:24,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:24,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981171468] [2023-11-06 22:03:24,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981171468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:24,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416084214] [2023-11-06 22:03:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:24,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:24,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:24,669 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:24,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:03:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:24,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:03:24,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:24,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,828 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:03:24,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:03:24,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,873 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:03:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:03:24,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,905 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:03:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:03:24,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:24,948 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:25,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:03:25,108 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:03:25,109 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 11 treesize of output 11 [2023-11-06 22:03:25,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:25,211 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:25,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:25,325 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 22:03:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:25,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:25,913 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:25,914 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 66 treesize of output 54 [2023-11-06 22:03:25,929 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:25,930 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 240 treesize of output 232 [2023-11-06 22:03:25,952 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 160 treesize of output 136 [2023-11-06 22:03:25,975 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:25,976 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 135 treesize of output 131 [2023-11-06 22:03:25,997 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:25,998 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 188 treesize of output 172 [2023-11-06 22:03:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:26,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416084214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:26,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:26,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-06 22:03:26,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382047442] [2023-11-06 22:03:26,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:26,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:03:26,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:03:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=470, Unknown=9, NotChecked=0, Total=552 [2023-11-06 22:03:27,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 489 [2023-11-06 22:03:27,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 88 transitions, 455 flow. Second operand has 24 states, 24 states have (on average 138.5) internal successors, (3324), 24 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:27,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:27,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 489 [2023-11-06 22:03:27,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:32,836 INFO L124 PetriNetUnfolderBase]: 2301/3485 cut-off events. [2023-11-06 22:03:32,836 INFO L125 PetriNetUnfolderBase]: For 1871/1901 co-relation queries the response was YES. [2023-11-06 22:03:32,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11272 conditions, 3485 events. 2301/3485 cut-off events. For 1871/1901 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 18312 event pairs, 289 based on Foata normal form. 30/2215 useless extension candidates. Maximal degree in co-relation 11251. Up to 1702 conditions per place. [2023-11-06 22:03:32,852 INFO L140 encePairwiseOnDemand]: 475/489 looper letters, 257 selfloop transitions, 114 changer transitions 0/374 dead transitions. [2023-11-06 22:03:32,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 374 transitions, 2383 flow [2023-11-06 22:03:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 22:03:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-06 22:03:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 6738 transitions. [2023-11-06 22:03:32,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2931732149849889 [2023-11-06 22:03:32,869 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 6738 transitions. [2023-11-06 22:03:32,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 6738 transitions. [2023-11-06 22:03:32,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:32,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 6738 transitions. [2023-11-06 22:03:32,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 143.36170212765958) internal successors, (6738), 47 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:32,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 489.0) internal successors, (23472), 48 states have internal predecessors, (23472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:32,917 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 489.0) internal successors, (23472), 48 states have internal predecessors, (23472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:32,917 INFO L175 Difference]: Start difference. First operand has 72 places, 88 transitions, 455 flow. Second operand 47 states and 6738 transitions. [2023-11-06 22:03:32,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 374 transitions, 2383 flow [2023-11-06 22:03:32,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 374 transitions, 2330 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:32,942 INFO L231 Difference]: Finished difference. Result has 134 places, 187 transitions, 1325 flow [2023-11-06 22:03:32,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1325, PETRI_PLACES=134, PETRI_TRANSITIONS=187} [2023-11-06 22:03:32,943 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 84 predicate places. [2023-11-06 22:03:32,943 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 187 transitions, 1325 flow [2023-11-06 22:03:32,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 138.5) internal successors, (3324), 24 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:32,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:32,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:32,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:33,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:03:33,150 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:03:33,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1288846218, now seen corresponding path program 1 times [2023-11-06 22:03:33,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:33,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759375543] [2023-11-06 22:03:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:33,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:33,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:33,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759375543] [2023-11-06 22:03:33,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759375543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:33,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632545330] [2023-11-06 22:03:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:33,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:33,829 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:33,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:03:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:33,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:03:33,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:34,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:03:34,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:03:34,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:03:34,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,063 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:03:34,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:03:34,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:03:34,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-06 22:03:34,179 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 22:03:34,262 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:03:34,262 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 11 treesize of output 11 [2023-11-06 22:03:34,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:34,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:34,429 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:34,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:03:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:34,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:39,248 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:39,254 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 74 treesize of output 62 [2023-11-06 22:03:39,300 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:39,301 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 5260 treesize of output 5140 [2023-11-06 22:03:39,382 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:39,383 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 467 treesize of output 463 [2023-11-06 22:03:39,413 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:39,414 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 612 treesize of output 596 [2023-11-06 22:03:39,445 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:39,445 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 588 treesize of output 548 [2023-11-06 22:03:39,478 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:03:39,479 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 540 treesize of output 452 [2023-11-06 22:03:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:41,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632545330] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:41,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:41,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-11-06 22:03:41,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472967530] [2023-11-06 22:03:41,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:41,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:03:41,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:41,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:03:41,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=564, Unknown=16, NotChecked=0, Total=702 [2023-11-06 22:03:44,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:03:45,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 489 [2023-11-06 22:03:45,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 187 transitions, 1325 flow. Second operand has 27 states, 27 states have (on average 137.44444444444446) internal successors, (3711), 27 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:03:45,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:45,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 489 [2023-11-06 22:03:45,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:48,138 WARN L539 Checker$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 22:03:49,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:03:53,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:03:59,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:04:03,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:04:06,028 INFO L124 PetriNetUnfolderBase]: 2550/3895 cut-off events. [2023-11-06 22:04:06,028 INFO L125 PetriNetUnfolderBase]: For 6978/7032 co-relation queries the response was YES. [2023-11-06 22:04:06,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14293 conditions, 3895 events. 2550/3895 cut-off events. For 6978/7032 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 20772 event pairs, 319 based on Foata normal form. 117/2843 useless extension candidates. Maximal degree in co-relation 14252. Up to 1766 conditions per place. [2023-11-06 22:04:06,048 INFO L140 encePairwiseOnDemand]: 475/489 looper letters, 284 selfloop transitions, 146 changer transitions 0/433 dead transitions. [2023-11-06 22:04:06,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 433 transitions, 3359 flow [2023-11-06 22:04:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:04:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-06 22:04:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6289 transitions. [2023-11-06 22:04:06,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29229410671128464 [2023-11-06 22:04:06,060 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6289 transitions. [2023-11-06 22:04:06,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6289 transitions. [2023-11-06 22:04:06,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:06,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6289 transitions. [2023-11-06 22:04:06,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 142.9318181818182) internal successors, (6289), 44 states have internal predecessors, (6289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:06,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 489.0) internal successors, (22005), 45 states have internal predecessors, (22005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:06,097 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 489.0) internal successors, (22005), 45 states have internal predecessors, (22005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:06,097 INFO L175 Difference]: Start difference. First operand has 134 places, 187 transitions, 1325 flow. Second operand 44 states and 6289 transitions. [2023-11-06 22:04:06,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 433 transitions, 3359 flow [2023-11-06 22:04:06,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 433 transitions, 3238 flow, removed 27 selfloop flow, removed 6 redundant places. [2023-11-06 22:04:06,162 INFO L231 Difference]: Finished difference. Result has 182 places, 228 transitions, 1992 flow [2023-11-06 22:04:06,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1992, PETRI_PLACES=182, PETRI_TRANSITIONS=228} [2023-11-06 22:04:06,163 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 132 predicate places. [2023-11-06 22:04:06,163 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 228 transitions, 1992 flow [2023-11-06 22:04:06,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 137.44444444444446) internal successors, (3711), 27 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:06,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:06,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:06,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:06,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:06,370 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:04:06,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:06,371 INFO L85 PathProgramCache]: Analyzing trace with hash 547104738, now seen corresponding path program 1 times [2023-11-06 22:04:06,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:06,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403969944] [2023-11-06 22:04:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:06,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:04:07,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:07,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403969944] [2023-11-06 22:04:07,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403969944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:07,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381849658] [2023-11-06 22:04:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:07,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:07,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:04:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:07,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:04:07,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:04:07,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:07,596 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:04:07,596 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 22:04:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:04:07,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381849658] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:07,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:07,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 4] total 14 [2023-11-06 22:04:07,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977902913] [2023-11-06 22:04:07,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:07,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:04:07,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:07,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:04:07,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:04:07,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 489 [2023-11-06 22:04:07,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 228 transitions, 1992 flow. Second operand has 5 states, 5 states have (on average 199.6) internal successors, (998), 5 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:07,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:07,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 489 [2023-11-06 22:04:07,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:08,564 INFO L124 PetriNetUnfolderBase]: 2785/4232 cut-off events. [2023-11-06 22:04:08,564 INFO L125 PetriNetUnfolderBase]: For 11755/11806 co-relation queries the response was YES. [2023-11-06 22:04:08,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16575 conditions, 4232 events. 2785/4232 cut-off events. For 11755/11806 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 22424 event pairs, 456 based on Foata normal form. 84/3282 useless extension candidates. Maximal degree in co-relation 16523. Up to 1949 conditions per place. [2023-11-06 22:04:08,593 INFO L140 encePairwiseOnDemand]: 479/489 looper letters, 195 selfloop transitions, 80 changer transitions 0/278 dead transitions. [2023-11-06 22:04:08,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 278 transitions, 2851 flow [2023-11-06 22:04:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:04:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:04:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1045 transitions. [2023-11-06 22:04:08,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274028629856851 [2023-11-06 22:04:08,596 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1045 transitions. [2023-11-06 22:04:08,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1045 transitions. [2023-11-06 22:04:08,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:08,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1045 transitions. [2023-11-06 22:04:08,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:08,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 489.0) internal successors, (2934), 6 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:08,601 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 489.0) internal successors, (2934), 6 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:08,601 INFO L175 Difference]: Start difference. First operand has 182 places, 228 transitions, 1992 flow. Second operand 5 states and 1045 transitions. [2023-11-06 22:04:08,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 278 transitions, 2851 flow [2023-11-06 22:04:08,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 278 transitions, 2715 flow, removed 39 selfloop flow, removed 15 redundant places. [2023-11-06 22:04:08,688 INFO L231 Difference]: Finished difference. Result has 174 places, 242 transitions, 2308 flow [2023-11-06 22:04:08,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2308, PETRI_PLACES=174, PETRI_TRANSITIONS=242} [2023-11-06 22:04:08,689 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 124 predicate places. [2023-11-06 22:04:08,689 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 242 transitions, 2308 flow [2023-11-06 22:04:08,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.6) internal successors, (998), 5 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:08,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:08,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:08,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:08,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:08,895 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:04:08,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1132899662, now seen corresponding path program 1 times [2023-11-06 22:04:08,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:08,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596718245] [2023-11-06 22:04:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:08,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:04:09,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:09,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596718245] [2023-11-06 22:04:09,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596718245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:09,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694962046] [2023-11-06 22:04:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:09,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:09,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:09,509 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:09,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:04:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:09,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:04:09,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:09,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,703 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:04:09,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,736 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-06 22:04:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:04:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:04:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:04:09,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:09,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:04:09,927 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 22:04:10,065 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:04:10,066 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 11 treesize of output 11 [2023-11-06 22:04:10,149 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 22 treesize of output 17 [2023-11-06 22:04:10,199 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 22 treesize of output 17 [2023-11-06 22:04:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:10,292 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 22 treesize of output 17 [2023-11-06 22:04:10,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:10,411 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 22 treesize of output 17 [2023-11-06 22:04:10,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:10,645 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 22 treesize of output 17 [2023-11-06 22:04:10,726 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 17 treesize of output 9 [2023-11-06 22:04:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:04:10,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:11,496 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:04:11,496 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 38 treesize of output 39 [2023-11-06 22:04:11,530 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:04:11,531 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 22659 treesize of output 22147 [2023-11-06 22:04:11,587 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 165 treesize of output 153 [2023-11-06 22:04:11,604 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 153 treesize of output 147 [2023-11-06 22:04:11,631 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 147 treesize of output 123 [2023-11-06 22:04:11,651 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 170 treesize of output 122 [2023-11-06 22:04:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:04:11,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694962046] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:11,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:11,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-11-06 22:04:11,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761337119] [2023-11-06 22:04:11,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:11,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:04:11,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:04:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=551, Unknown=6, NotChecked=0, Total=650 [2023-11-06 22:04:12,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 489 [2023-11-06 22:04:12,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 242 transitions, 2308 flow. Second operand has 26 states, 26 states have (on average 145.57692307692307) internal successors, (3785), 26 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:12,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:12,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 489 [2023-11-06 22:04:12,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:17,700 INFO L124 PetriNetUnfolderBase]: 3052/4682 cut-off events. [2023-11-06 22:04:17,700 INFO L125 PetriNetUnfolderBase]: For 16175/16254 co-relation queries the response was YES. [2023-11-06 22:04:17,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19867 conditions, 4682 events. 3052/4682 cut-off events. For 16175/16254 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25604 event pairs, 515 based on Foata normal form. 170/3867 useless extension candidates. Maximal degree in co-relation 19811. Up to 2021 conditions per place. [2023-11-06 22:04:17,727 INFO L140 encePairwiseOnDemand]: 475/489 looper letters, 268 selfloop transitions, 115 changer transitions 0/386 dead transitions. [2023-11-06 22:04:17,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 386 transitions, 4038 flow [2023-11-06 22:04:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:04:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:04:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2878 transitions. [2023-11-06 22:04:17,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3097621353998493 [2023-11-06 22:04:17,734 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2878 transitions. [2023-11-06 22:04:17,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2878 transitions. [2023-11-06 22:04:17,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:17,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2878 transitions. [2023-11-06 22:04:17,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 151.47368421052633) internal successors, (2878), 19 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:17,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:17,749 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:17,749 INFO L175 Difference]: Start difference. First operand has 174 places, 242 transitions, 2308 flow. Second operand 19 states and 2878 transitions. [2023-11-06 22:04:17,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 386 transitions, 4038 flow [2023-11-06 22:04:17,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 386 transitions, 3843 flow, removed 48 selfloop flow, removed 11 redundant places. [2023-11-06 22:04:17,890 INFO L231 Difference]: Finished difference. Result has 190 places, 282 transitions, 3065 flow [2023-11-06 22:04:17,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3065, PETRI_PLACES=190, PETRI_TRANSITIONS=282} [2023-11-06 22:04:17,891 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 140 predicate places. [2023-11-06 22:04:17,891 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 282 transitions, 3065 flow [2023-11-06 22:04:17,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 145.57692307692307) internal successors, (3785), 26 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:17,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:17,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:17,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:18,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:04:18,092 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:04:18,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash -913408610, now seen corresponding path program 2 times [2023-11-06 22:04:18,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:18,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425088656] [2023-11-06 22:04:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:04:18,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425088656] [2023-11-06 22:04:18,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425088656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103491208] [2023-11-06 22:04:18,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:04:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:18,685 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:18,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:04:18,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:04:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:18,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:04:18,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:19,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:04:19,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:19,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103491208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:19,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:04:19,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-11-06 22:04:19,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699421967] [2023-11-06 22:04:19,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:19,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:04:19,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:19,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:04:19,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:04:19,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 489 [2023-11-06 22:04:19,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 282 transitions, 3065 flow. Second operand has 7 states, 7 states have (on average 190.85714285714286) internal successors, (1336), 7 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:19,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:19,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 489 [2023-11-06 22:04:19,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:20,407 INFO L124 PetriNetUnfolderBase]: 3398/5256 cut-off events. [2023-11-06 22:04:20,407 INFO L125 PetriNetUnfolderBase]: For 21633/21705 co-relation queries the response was YES. [2023-11-06 22:04:20,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23335 conditions, 5256 events. 3398/5256 cut-off events. For 21633/21705 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29762 event pairs, 1030 based on Foata normal form. 96/4201 useless extension candidates. Maximal degree in co-relation 23279. Up to 3969 conditions per place. [2023-11-06 22:04:20,445 INFO L140 encePairwiseOnDemand]: 482/489 looper letters, 281 selfloop transitions, 65 changer transitions 0/349 dead transitions. [2023-11-06 22:04:20,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 349 transitions, 4434 flow [2023-11-06 22:04:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:04:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:04:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1194 transitions. [2023-11-06 22:04:20,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069529652351738 [2023-11-06 22:04:20,448 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1194 transitions. [2023-11-06 22:04:20,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1194 transitions. [2023-11-06 22:04:20,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:20,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1194 transitions. [2023-11-06 22:04:20,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:20,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:20,452 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:20,452 INFO L175 Difference]: Start difference. First operand has 190 places, 282 transitions, 3065 flow. Second operand 6 states and 1194 transitions. [2023-11-06 22:04:20,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 349 transitions, 4434 flow [2023-11-06 22:04:20,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 349 transitions, 4325 flow, removed 29 selfloop flow, removed 7 redundant places. [2023-11-06 22:04:20,625 INFO L231 Difference]: Finished difference. Result has 190 places, 294 transitions, 3304 flow [2023-11-06 22:04:20,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3304, PETRI_PLACES=190, PETRI_TRANSITIONS=294} [2023-11-06 22:04:20,626 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 140 predicate places. [2023-11-06 22:04:20,626 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 294 transitions, 3304 flow [2023-11-06 22:04:20,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.85714285714286) internal successors, (1336), 7 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:20,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:20,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:20,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:20,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:20,827 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:04:20,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1888032626, now seen corresponding path program 1 times [2023-11-06 22:04:20,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:20,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448782067] [2023-11-06 22:04:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:04:21,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:21,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448782067] [2023-11-06 22:04:21,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448782067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:21,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414090835] [2023-11-06 22:04:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:21,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:21,542 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:21,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:04:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:21,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:04:21,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:21,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,769 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:04:21,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:04:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,841 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-06 22:04:21,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:04:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:04:21,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:21,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:04:22,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:04:22,141 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:04:22,141 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 11 treesize of output 11 [2023-11-06 22:04:22,251 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:22,304 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:22,409 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 22:04:22,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:22,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:22,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:22,750 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:22,822 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 15 treesize of output 7 [2023-11-06 22:04:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:04:22,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:23,641 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:04:23,641 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 37 treesize of output 38 [2023-11-06 22:04:23,661 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:04:23,662 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 5409 treesize of output 5281 [2023-11-06 22:04:23,691 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 320 treesize of output 308 [2023-11-06 22:04:23,706 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 156 treesize of output 150 [2023-11-06 22:04:23,720 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 302 treesize of output 278 [2023-11-06 22:04:23,732 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 278 treesize of output 230 [2023-11-06 22:04:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:04:24,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414090835] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:24,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:24,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-11-06 22:04:24,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312366674] [2023-11-06 22:04:24,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:24,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:04:24,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:24,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:04:24,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=552, Unknown=6, NotChecked=0, Total=650 [2023-11-06 22:04:26,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:04:28,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:04:31,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:04:33,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 489 [2023-11-06 22:04:33,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 294 transitions, 3304 flow. Second operand has 26 states, 26 states have (on average 145.57692307692307) internal successors, (3785), 26 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:33,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:33,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 489 [2023-11-06 22:04:33,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:38,165 INFO L124 PetriNetUnfolderBase]: 3369/5235 cut-off events. [2023-11-06 22:04:38,165 INFO L125 PetriNetUnfolderBase]: For 25975/26047 co-relation queries the response was YES. [2023-11-06 22:04:38,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24032 conditions, 5235 events. 3369/5235 cut-off events. For 25975/26047 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 29992 event pairs, 692 based on Foata normal form. 109/4251 useless extension candidates. Maximal degree in co-relation 23973. Up to 2491 conditions per place. [2023-11-06 22:04:38,209 INFO L140 encePairwiseOnDemand]: 475/489 looper letters, 266 selfloop transitions, 137 changer transitions 1/407 dead transitions. [2023-11-06 22:04:38,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 407 transitions, 4768 flow [2023-11-06 22:04:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:04:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:04:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3311 transitions. [2023-11-06 22:04:38,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30777096114519426 [2023-11-06 22:04:38,216 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3311 transitions. [2023-11-06 22:04:38,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3311 transitions. [2023-11-06 22:04:38,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:38,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3311 transitions. [2023-11-06 22:04:38,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 150.5) internal successors, (3311), 22 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:38,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:38,235 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:38,236 INFO L175 Difference]: Start difference. First operand has 190 places, 294 transitions, 3304 flow. Second operand 22 states and 3311 transitions. [2023-11-06 22:04:38,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 407 transitions, 4768 flow [2023-11-06 22:04:38,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 407 transitions, 4607 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-11-06 22:04:38,467 INFO L231 Difference]: Finished difference. Result has 210 places, 305 transitions, 3746 flow [2023-11-06 22:04:38,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3136, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3746, PETRI_PLACES=210, PETRI_TRANSITIONS=305} [2023-11-06 22:04:38,468 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2023-11-06 22:04:38,468 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 305 transitions, 3746 flow [2023-11-06 22:04:38,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 145.57692307692307) internal successors, (3785), 26 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:38,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:38,469 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:38,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:38,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:38,670 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:04:38,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:38,670 INFO L85 PathProgramCache]: Analyzing trace with hash -457881879, now seen corresponding path program 1 times [2023-11-06 22:04:38,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:38,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359302587] [2023-11-06 22:04:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:38,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:04:38,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:38,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359302587] [2023-11-06 22:04:38,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359302587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:38,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:38,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:04:38,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189953618] [2023-11-06 22:04:38,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:38,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:38,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:38,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 489 [2023-11-06 22:04:38,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 305 transitions, 3746 flow. Second operand has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:38,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:38,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 489 [2023-11-06 22:04:38,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:40,119 INFO L124 PetriNetUnfolderBase]: 4241/6454 cut-off events. [2023-11-06 22:04:40,119 INFO L125 PetriNetUnfolderBase]: For 44300/44360 co-relation queries the response was YES. [2023-11-06 22:04:40,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31469 conditions, 6454 events. 4241/6454 cut-off events. For 44300/44360 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 38682 event pairs, 706 based on Foata normal form. 184/4856 useless extension candidates. Maximal degree in co-relation 31408. Up to 3109 conditions per place. [2023-11-06 22:04:40,165 INFO L140 encePairwiseOnDemand]: 485/489 looper letters, 360 selfloop transitions, 72 changer transitions 0/436 dead transitions. [2023-11-06 22:04:40,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 436 transitions, 6365 flow [2023-11-06 22:04:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:04:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:04:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 906 transitions. [2023-11-06 22:04:40,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46319018404907975 [2023-11-06 22:04:40,168 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 906 transitions. [2023-11-06 22:04:40,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 906 transitions. [2023-11-06 22:04:40,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:40,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 906 transitions. [2023-11-06 22:04:40,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.5) internal successors, (906), 4 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:40,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:40,173 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:40,173 INFO L175 Difference]: Start difference. First operand has 210 places, 305 transitions, 3746 flow. Second operand 4 states and 906 transitions. [2023-11-06 22:04:40,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 436 transitions, 6365 flow [2023-11-06 22:04:40,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 436 transitions, 6189 flow, removed 14 selfloop flow, removed 15 redundant places. [2023-11-06 22:04:40,417 INFO L231 Difference]: Finished difference. Result has 198 places, 311 transitions, 3922 flow [2023-11-06 22:04:40,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3457, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3922, PETRI_PLACES=198, PETRI_TRANSITIONS=311} [2023-11-06 22:04:40,418 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 148 predicate places. [2023-11-06 22:04:40,418 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 311 transitions, 3922 flow [2023-11-06 22:04:40,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:40,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:40,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:40,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-06 22:04:40,419 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:04:40,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:40,419 INFO L85 PathProgramCache]: Analyzing trace with hash 355895260, now seen corresponding path program 2 times [2023-11-06 22:04:40,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75259046] [2023-11-06 22:04:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:40,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:04:41,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:41,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75259046] [2023-11-06 22:04:41,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75259046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:41,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670794008] [2023-11-06 22:04:41,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:04:41,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:41,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:41,169 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:41,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:04:41,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:04:41,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:41,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:04:41,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:41,359 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 22:04:41,565 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:41,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:04:41,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:41,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670794008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:41,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:04:41,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-11-06 22:04:41,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671244524] [2023-11-06 22:04:41,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:41,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:04:41,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:04:41,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:04:41,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 489 [2023-11-06 22:04:41,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 311 transitions, 3922 flow. Second operand has 8 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:42,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:42,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 489 [2023-11-06 22:04:42,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:43,373 INFO L124 PetriNetUnfolderBase]: 4012/6270 cut-off events. [2023-11-06 22:04:43,373 INFO L125 PetriNetUnfolderBase]: For 49463/49554 co-relation queries the response was YES. [2023-11-06 22:04:43,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31946 conditions, 6270 events. 4012/6270 cut-off events. For 49463/49554 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 37276 event pairs, 722 based on Foata normal form. 362/5094 useless extension candidates. Maximal degree in co-relation 31885. Up to 3706 conditions per place. [2023-11-06 22:04:43,418 INFO L140 encePairwiseOnDemand]: 482/489 looper letters, 301 selfloop transitions, 64 changer transitions 0/368 dead transitions. [2023-11-06 22:04:43,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 368 transitions, 5280 flow [2023-11-06 22:04:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:04:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:04:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1184 transitions. [2023-11-06 22:04:43,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40354464894342196 [2023-11-06 22:04:43,421 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1184 transitions. [2023-11-06 22:04:43,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1184 transitions. [2023-11-06 22:04:43,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:43,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1184 transitions. [2023-11-06 22:04:43,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.33333333333334) internal successors, (1184), 6 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:43,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:43,426 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:43,426 INFO L175 Difference]: Start difference. First operand has 198 places, 311 transitions, 3922 flow. Second operand 6 states and 1184 transitions. [2023-11-06 22:04:43,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 368 transitions, 5280 flow [2023-11-06 22:04:43,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 368 transitions, 5230 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-11-06 22:04:43,658 INFO L231 Difference]: Finished difference. Result has 205 places, 314 transitions, 4166 flow [2023-11-06 22:04:43,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3885, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4166, PETRI_PLACES=205, PETRI_TRANSITIONS=314} [2023-11-06 22:04:43,659 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 155 predicate places. [2023-11-06 22:04:43,660 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 314 transitions, 4166 flow [2023-11-06 22:04:43,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:43,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:43,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:43,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:43,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:43,861 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:04:43,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:43,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2104693496, now seen corresponding path program 2 times [2023-11-06 22:04:43,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:43,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689732448] [2023-11-06 22:04:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:43,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:44,944 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 22:04:44,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:44,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689732448] [2023-11-06 22:04:44,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689732448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:44,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152949689] [2023-11-06 22:04:44,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:04:44,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:44,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:44,947 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:44,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:04:45,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:04:45,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:45,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:04:45,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,362 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:45,434 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:04:45,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:45,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152949689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:45,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:04:45,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-11-06 22:04:45,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639341598] [2023-11-06 22:04:45,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:45,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:04:45,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:45,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:04:45,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:04:45,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 489 [2023-11-06 22:04:45,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 314 transitions, 4166 flow. Second operand has 8 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:45,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:45,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 489 [2023-11-06 22:04:45,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:47,577 INFO L124 PetriNetUnfolderBase]: 3963/6192 cut-off events. [2023-11-06 22:04:47,577 INFO L125 PetriNetUnfolderBase]: For 45315/45406 co-relation queries the response was YES. [2023-11-06 22:04:47,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30808 conditions, 6192 events. 3963/6192 cut-off events. For 45315/45406 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 36532 event pairs, 1268 based on Foata normal form. 101/4779 useless extension candidates. Maximal degree in co-relation 30743. Up to 4385 conditions per place. [2023-11-06 22:04:47,629 INFO L140 encePairwiseOnDemand]: 483/489 looper letters, 298 selfloop transitions, 58 changer transitions 0/359 dead transitions. [2023-11-06 22:04:47,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 359 transitions, 5331 flow [2023-11-06 22:04:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:04:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:04:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1181 transitions. [2023-11-06 22:04:47,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40252215405589636 [2023-11-06 22:04:47,633 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1181 transitions. [2023-11-06 22:04:47,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1181 transitions. [2023-11-06 22:04:47,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:47,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1181 transitions. [2023-11-06 22:04:47,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.83333333333334) internal successors, (1181), 6 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:47,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:47,639 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:47,639 INFO L175 Difference]: Start difference. First operand has 205 places, 314 transitions, 4166 flow. Second operand 6 states and 1181 transitions. [2023-11-06 22:04:47,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 359 transitions, 5331 flow [2023-11-06 22:04:47,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 359 transitions, 5208 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-06 22:04:47,938 INFO L231 Difference]: Finished difference. Result has 203 places, 312 transitions, 4125 flow [2023-11-06 22:04:47,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4009, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4125, PETRI_PLACES=203, PETRI_TRANSITIONS=312} [2023-11-06 22:04:47,939 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 153 predicate places. [2023-11-06 22:04:47,939 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 312 transitions, 4125 flow [2023-11-06 22:04:47,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:47,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:47,940 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:47,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:48,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:48,140 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:04:48,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:48,141 INFO L85 PathProgramCache]: Analyzing trace with hash -44583818, now seen corresponding path program 2 times [2023-11-06 22:04:48,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:48,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246974522] [2023-11-06 22:04:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:48,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:49,375 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 22:04:49,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:49,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246974522] [2023-11-06 22:04:49,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246974522] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:49,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797222750] [2023-11-06 22:04:49,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:04:49,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:49,378 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:49,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:04:49,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:04:49,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:49,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:04:49,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:49,635 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 42 treesize of output 38 [2023-11-06 22:04:49,852 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:49,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:49,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:04:49,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:49,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797222750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:49,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:04:49,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-11-06 22:04:49,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628303901] [2023-11-06 22:04:49,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:49,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:04:49,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:49,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:04:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:04:50,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 489 [2023-11-06 22:04:50,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 312 transitions, 4125 flow. Second operand has 8 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:50,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:50,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 489 [2023-11-06 22:04:50,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:51,859 INFO L124 PetriNetUnfolderBase]: 3733/5882 cut-off events. [2023-11-06 22:04:51,859 INFO L125 PetriNetUnfolderBase]: For 43335/43407 co-relation queries the response was YES. [2023-11-06 22:04:51,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29096 conditions, 5882 events. 3733/5882 cut-off events. For 43335/43407 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34730 event pairs, 1042 based on Foata normal form. 139/4618 useless extension candidates. Maximal degree in co-relation 29035. Up to 4190 conditions per place. [2023-11-06 22:04:51,913 INFO L140 encePairwiseOnDemand]: 482/489 looper letters, 265 selfloop transitions, 91 changer transitions 0/359 dead transitions. [2023-11-06 22:04:51,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 359 transitions, 5325 flow [2023-11-06 22:04:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:04:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:04:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1177 transitions. [2023-11-06 22:04:51,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40115882753919563 [2023-11-06 22:04:51,916 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1177 transitions. [2023-11-06 22:04:51,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1177 transitions. [2023-11-06 22:04:51,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:51,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1177 transitions. [2023-11-06 22:04:51,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.16666666666666) internal successors, (1177), 6 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:51,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:51,920 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:51,920 INFO L175 Difference]: Start difference. First operand has 203 places, 312 transitions, 4125 flow. Second operand 6 states and 1177 transitions. [2023-11-06 22:04:51,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 359 transitions, 5325 flow [2023-11-06 22:04:52,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 359 transitions, 5214 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-06 22:04:52,229 INFO L231 Difference]: Finished difference. Result has 205 places, 325 transitions, 4523 flow [2023-11-06 22:04:52,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3978, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4523, PETRI_PLACES=205, PETRI_TRANSITIONS=325} [2023-11-06 22:04:52,230 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 155 predicate places. [2023-11-06 22:04:52,230 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 325 transitions, 4523 flow [2023-11-06 22:04:52,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:52,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:52,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:52,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:52,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:04:52,436 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:04:52,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:52,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2104693398, now seen corresponding path program 3 times [2023-11-06 22:04:52,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:52,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455508361] [2023-11-06 22:04:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:52,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:54,433 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 22:04:54,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:54,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455508361] [2023-11-06 22:04:54,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455508361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:54,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118662400] [2023-11-06 22:04:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:04:54,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:54,435 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:54,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:04:54,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:04:54,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:54,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:04:54,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:54,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:54,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:54,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:04:54,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:04:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:04:55,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:55,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118662400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:55,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:04:55,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-11-06 22:04:55,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505199460] [2023-11-06 22:04:55,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:55,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:04:55,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:04:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:04:55,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 489 [2023-11-06 22:04:55,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 325 transitions, 4523 flow. Second operand has 8 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:55,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:55,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 489 [2023-11-06 22:04:55,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:56,750 INFO L124 PetriNetUnfolderBase]: 3701/5829 cut-off events. [2023-11-06 22:04:56,750 INFO L125 PetriNetUnfolderBase]: For 44600/44672 co-relation queries the response was YES. [2023-11-06 22:04:56,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29427 conditions, 5829 events. 3701/5829 cut-off events. For 44600/44672 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34478 event pairs, 1221 based on Foata normal form. 77/4527 useless extension candidates. Maximal degree in co-relation 29366. Up to 4074 conditions per place. [2023-11-06 22:04:56,808 INFO L140 encePairwiseOnDemand]: 483/489 looper letters, 293 selfloop transitions, 58 changer transitions 1/355 dead transitions. [2023-11-06 22:04:56,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 355 transitions, 5395 flow [2023-11-06 22:04:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:04:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:04:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1180 transitions. [2023-11-06 22:04:56,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021813224267212 [2023-11-06 22:04:56,811 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1180 transitions. [2023-11-06 22:04:56,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1180 transitions. [2023-11-06 22:04:56,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:56,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1180 transitions. [2023-11-06 22:04:56,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.66666666666666) internal successors, (1180), 6 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:56,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:56,817 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:56,818 INFO L175 Difference]: Start difference. First operand has 205 places, 325 transitions, 4523 flow. Second operand 6 states and 1180 transitions. [2023-11-06 22:04:56,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 355 transitions, 5395 flow [2023-11-06 22:04:57,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 355 transitions, 5190 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 22:04:57,133 INFO L231 Difference]: Finished difference. Result has 203 places, 324 transitions, 4414 flow [2023-11-06 22:04:57,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4298, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4414, PETRI_PLACES=203, PETRI_TRANSITIONS=324} [2023-11-06 22:04:57,134 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 153 predicate places. [2023-11-06 22:04:57,134 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 324 transitions, 4414 flow [2023-11-06 22:04:57,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:57,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:57,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:57,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:57,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:04:57,341 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:04:57,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2100369859, now seen corresponding path program 1 times [2023-11-06 22:04:57,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:57,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927680111] [2023-11-06 22:04:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:57,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:04:57,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:57,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927680111] [2023-11-06 22:04:57,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927680111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:57,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093256659] [2023-11-06 22:04:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:57,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:57,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:57,909 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:57,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:04:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:58,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:04:58,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:04:58,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:58,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093256659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:58,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:04:58,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-11-06 22:04:58,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31725264] [2023-11-06 22:04:58,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:58,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:58,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:04:58,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 489 [2023-11-06 22:04:58,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 324 transitions, 4414 flow. Second operand has 4 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:58,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:58,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 489 [2023-11-06 22:04:58,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:04:59,633 INFO L124 PetriNetUnfolderBase]: 3817/5885 cut-off events. [2023-11-06 22:04:59,633 INFO L125 PetriNetUnfolderBase]: For 43574/43615 co-relation queries the response was YES. [2023-11-06 22:04:59,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29025 conditions, 5885 events. 3817/5885 cut-off events. For 43574/43615 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33423 event pairs, 579 based on Foata normal form. 41/4302 useless extension candidates. Maximal degree in co-relation 28967. Up to 3264 conditions per place. [2023-11-06 22:04:59,681 INFO L140 encePairwiseOnDemand]: 481/489 looper letters, 260 selfloop transitions, 97 changer transitions 0/361 dead transitions. [2023-11-06 22:04:59,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 361 transitions, 5399 flow [2023-11-06 22:04:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:04:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:04:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 861 transitions. [2023-11-06 22:04:59,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4401840490797546 [2023-11-06 22:04:59,684 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 861 transitions. [2023-11-06 22:04:59,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 861 transitions. [2023-11-06 22:04:59,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:04:59,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 861 transitions. [2023-11-06 22:04:59,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,688 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,688 INFO L175 Difference]: Start difference. First operand has 203 places, 324 transitions, 4414 flow. Second operand 4 states and 861 transitions. [2023-11-06 22:04:59,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 361 transitions, 5399 flow [2023-11-06 22:04:59,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 361 transitions, 5304 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:04:59,920 INFO L231 Difference]: Finished difference. Result has 203 places, 329 transitions, 4661 flow [2023-11-06 22:04:59,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4661, PETRI_PLACES=203, PETRI_TRANSITIONS=329} [2023-11-06 22:04:59,921 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 153 predicate places. [2023-11-06 22:04:59,921 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 329 transitions, 4661 flow [2023-11-06 22:04:59,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:59,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:59,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:00,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:05:00,124 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:05:00,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1245316684, now seen corresponding path program 1 times [2023-11-06 22:05:00,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:00,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921889142] [2023-11-06 22:05:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:05:01,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:01,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921889142] [2023-11-06 22:05:01,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921889142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:01,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622287878] [2023-11-06 22:05:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:01,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:01,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:01,017 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:01,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:05:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:01,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:05:01,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:01,356 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 22:05:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:01,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:05:01,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:01,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:05:01,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:01,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:05:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:05:01,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:02,465 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:02,465 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 34 treesize of output 35 [2023-11-06 22:05:02,489 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:02,490 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 341 treesize of output 325 [2023-11-06 22:05:02,511 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 73 treesize of output 61 [2023-11-06 22:05:02,523 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 61 treesize of output 55 [2023-11-06 22:05:02,612 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 74 treesize of output 50 [2023-11-06 22:05:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:05:02,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622287878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:02,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:02,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-06 22:05:02,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975408900] [2023-11-06 22:05:02,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:02,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:05:02,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:02,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:05:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=428, Unknown=2, NotChecked=0, Total=506 [2023-11-06 22:05:05,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:08,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:09,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 489 [2023-11-06 22:05:09,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 329 transitions, 4661 flow. Second operand has 23 states, 23 states have (on average 149.82608695652175) internal successors, (3446), 23 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:09,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:09,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 489 [2023-11-06 22:05:09,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:14,453 INFO L124 PetriNetUnfolderBase]: 7591/11560 cut-off events. [2023-11-06 22:05:14,454 INFO L125 PetriNetUnfolderBase]: For 78930/78971 co-relation queries the response was YES. [2023-11-06 22:05:14,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58380 conditions, 11560 events. 7591/11560 cut-off events. For 78930/78971 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 72171 event pairs, 1232 based on Foata normal form. 41/8250 useless extension candidates. Maximal degree in co-relation 58321. Up to 5648 conditions per place. [2023-11-06 22:05:14,570 INFO L140 encePairwiseOnDemand]: 475/489 looper letters, 429 selfloop transitions, 135 changer transitions 0/568 dead transitions. [2023-11-06 22:05:14,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 568 transitions, 8214 flow [2023-11-06 22:05:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:05:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:05:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2526 transitions. [2023-11-06 22:05:14,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32285276073619634 [2023-11-06 22:05:14,574 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2526 transitions. [2023-11-06 22:05:14,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2526 transitions. [2023-11-06 22:05:14,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:14,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2526 transitions. [2023-11-06 22:05:14,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 157.875) internal successors, (2526), 16 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:14,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:14,586 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:14,586 INFO L175 Difference]: Start difference. First operand has 203 places, 329 transitions, 4661 flow. Second operand 16 states and 2526 transitions. [2023-11-06 22:05:14,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 568 transitions, 8214 flow [2023-11-06 22:05:15,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 568 transitions, 8090 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-06 22:05:15,021 INFO L231 Difference]: Finished difference. Result has 224 places, 368 transitions, 5422 flow [2023-11-06 22:05:15,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4547, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5422, PETRI_PLACES=224, PETRI_TRANSITIONS=368} [2023-11-06 22:05:15,022 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 174 predicate places. [2023-11-06 22:05:15,022 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 368 transitions, 5422 flow [2023-11-06 22:05:15,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 149.82608695652175) internal successors, (3446), 23 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:15,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:15,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:15,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:15,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:15,224 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:05:15,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:15,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1049623325, now seen corresponding path program 1 times [2023-11-06 22:05:15,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:15,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820503629] [2023-11-06 22:05:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:15,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:05:15,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820503629] [2023-11-06 22:05:15,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820503629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652052198] [2023-11-06 22:05:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:15,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:15,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:15,409 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:15,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:05:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:15,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:05:15,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:05:15,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:05:15,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652052198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:15,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:15,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:05:15,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925979041] [2023-11-06 22:05:15,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:15,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:05:15,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:15,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:05:15,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:05:16,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 489 [2023-11-06 22:05:16,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 368 transitions, 5422 flow. Second operand has 12 states, 12 states have (on average 196.08333333333334) internal successors, (2353), 12 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:16,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:16,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 489 [2023-11-06 22:05:16,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:18,407 INFO L124 PetriNetUnfolderBase]: 5981/9466 cut-off events. [2023-11-06 22:05:18,407 INFO L125 PetriNetUnfolderBase]: For 104509/104550 co-relation queries the response was YES. [2023-11-06 22:05:18,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53792 conditions, 9466 events. 5981/9466 cut-off events. For 104509/104550 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 60974 event pairs, 2560 based on Foata normal form. 755/8121 useless extension candidates. Maximal degree in co-relation 53725. Up to 6429 conditions per place. [2023-11-06 22:05:18,503 INFO L140 encePairwiseOnDemand]: 482/489 looper letters, 322 selfloop transitions, 70 changer transitions 4/400 dead transitions. [2023-11-06 22:05:18,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 400 transitions, 6482 flow [2023-11-06 22:05:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:05:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:05:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1224 transitions. [2023-11-06 22:05:18,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171779141104294 [2023-11-06 22:05:18,506 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1224 transitions. [2023-11-06 22:05:18,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1224 transitions. [2023-11-06 22:05:18,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:18,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1224 transitions. [2023-11-06 22:05:18,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:18,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:18,509 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:18,510 INFO L175 Difference]: Start difference. First operand has 224 places, 368 transitions, 5422 flow. Second operand 6 states and 1224 transitions. [2023-11-06 22:05:18,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 400 transitions, 6482 flow [2023-11-06 22:05:19,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 400 transitions, 6358 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-11-06 22:05:19,302 INFO L231 Difference]: Finished difference. Result has 222 places, 350 transitions, 5261 flow [2023-11-06 22:05:19,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5086, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5261, PETRI_PLACES=222, PETRI_TRANSITIONS=350} [2023-11-06 22:05:19,303 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 172 predicate places. [2023-11-06 22:05:19,303 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 350 transitions, 5261 flow [2023-11-06 22:05:19,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 196.08333333333334) internal successors, (2353), 12 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:19,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:19,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:19,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:19,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 22:05:19,504 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:05:19,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:19,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1030699609, now seen corresponding path program 2 times [2023-11-06 22:05:19,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:19,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577751600] [2023-11-06 22:05:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:19,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:05:20,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:20,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577751600] [2023-11-06 22:05:20,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577751600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:20,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928356931] [2023-11-06 22:05:20,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:05:20,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:20,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:20,249 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:20,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:05:20,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:05:20,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:20,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:05:20,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:20,785 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 22 treesize of output 17 [2023-11-06 22:05:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:05:20,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:05:20,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928356931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:20,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:05:20,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-06 22:05:20,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317685819] [2023-11-06 22:05:20,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:20,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:05:20,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:05:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:05:21,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 489 [2023-11-06 22:05:21,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 350 transitions, 5261 flow. Second operand has 7 states, 7 states have (on average 194.0) internal successors, (1358), 7 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:21,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:21,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 489 [2023-11-06 22:05:21,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:23,111 INFO L124 PetriNetUnfolderBase]: 5251/8446 cut-off events. [2023-11-06 22:05:23,111 INFO L125 PetriNetUnfolderBase]: For 84958/84999 co-relation queries the response was YES. [2023-11-06 22:05:23,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48185 conditions, 8446 events. 5251/8446 cut-off events. For 84958/84999 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 53216 event pairs, 626 based on Foata normal form. 99/7013 useless extension candidates. Maximal degree in co-relation 48118. Up to 4689 conditions per place. [2023-11-06 22:05:23,193 INFO L140 encePairwiseOnDemand]: 481/489 looper letters, 244 selfloop transitions, 131 changer transitions 0/379 dead transitions. [2023-11-06 22:05:23,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 379 transitions, 6251 flow [2023-11-06 22:05:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:05:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:05:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1012 transitions. [2023-11-06 22:05:23,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139059304703476 [2023-11-06 22:05:23,196 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1012 transitions. [2023-11-06 22:05:23,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1012 transitions. [2023-11-06 22:05:23,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:23,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1012 transitions. [2023-11-06 22:05:23,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.4) internal successors, (1012), 5 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:23,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 489.0) internal successors, (2934), 6 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:23,201 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 489.0) internal successors, (2934), 6 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:23,201 INFO L175 Difference]: Start difference. First operand has 222 places, 350 transitions, 5261 flow. Second operand 5 states and 1012 transitions. [2023-11-06 22:05:23,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 379 transitions, 6251 flow [2023-11-06 22:05:23,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 379 transitions, 6114 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-11-06 22:05:23,945 INFO L231 Difference]: Finished difference. Result has 220 places, 348 transitions, 5492 flow [2023-11-06 22:05:23,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5492, PETRI_PLACES=220, PETRI_TRANSITIONS=348} [2023-11-06 22:05:23,946 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 170 predicate places. [2023-11-06 22:05:23,946 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 348 transitions, 5492 flow [2023-11-06 22:05:23,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 194.0) internal successors, (1358), 7 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:23,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:23,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:23,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:24,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 22:05:24,148 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:05:24,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1911405962, now seen corresponding path program 1 times [2023-11-06 22:05:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:24,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596665424] [2023-11-06 22:05:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:24,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:26,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:26,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596665424] [2023-11-06 22:05:26,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596665424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:26,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479131192] [2023-11-06 22:05:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:26,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:26,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:26,792 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:26,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:05:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:26,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:05:26,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:05:27,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:27,283 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:27,283 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 22:05:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:05:27,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479131192] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:27,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:05:27,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [11, 3] total 16 [2023-11-06 22:05:27,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68634424] [2023-11-06 22:05:27,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:27,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:05:27,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:05:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:05:27,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 489 [2023-11-06 22:05:27,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 348 transitions, 5492 flow. Second operand has 4 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:27,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:27,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 489 [2023-11-06 22:05:27,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:29,543 INFO L124 PetriNetUnfolderBase]: 5098/8337 cut-off events. [2023-11-06 22:05:29,543 INFO L125 PetriNetUnfolderBase]: For 87230/87271 co-relation queries the response was YES. [2023-11-06 22:05:29,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48934 conditions, 8337 events. 5098/8337 cut-off events. For 87230/87271 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 54549 event pairs, 440 based on Foata normal form. 41/7004 useless extension candidates. Maximal degree in co-relation 48867. Up to 5467 conditions per place. [2023-11-06 22:05:29,631 INFO L140 encePairwiseOnDemand]: 482/489 looper letters, 272 selfloop transitions, 103 changer transitions 0/379 dead transitions. [2023-11-06 22:05:29,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 379 transitions, 6470 flow [2023-11-06 22:05:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:05:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:05:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 852 transitions. [2023-11-06 22:05:29,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43558282208588955 [2023-11-06 22:05:29,634 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 852 transitions. [2023-11-06 22:05:29,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 852 transitions. [2023-11-06 22:05:29,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:29,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 852 transitions. [2023-11-06 22:05:29,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:29,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:29,637 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:29,637 INFO L175 Difference]: Start difference. First operand has 220 places, 348 transitions, 5492 flow. Second operand 4 states and 852 transitions. [2023-11-06 22:05:29,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 379 transitions, 6470 flow [2023-11-06 22:05:30,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 379 transitions, 6334 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 22:05:30,264 INFO L231 Difference]: Finished difference. Result has 220 places, 347 transitions, 5551 flow [2023-11-06 22:05:30,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5345, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5551, PETRI_PLACES=220, PETRI_TRANSITIONS=347} [2023-11-06 22:05:30,265 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 170 predicate places. [2023-11-06 22:05:30,265 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 347 transitions, 5551 flow [2023-11-06 22:05:30,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:30,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:30,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:30,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:30,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:30,466 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-11-06 22:05:30,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:30,467 INFO L85 PathProgramCache]: Analyzing trace with hash 158379045, now seen corresponding path program 1 times [2023-11-06 22:05:30,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:30,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59001814] [2023-11-06 22:05:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:30,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:05:31,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:31,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59001814] [2023-11-06 22:05:31,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59001814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:31,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235503964] [2023-11-06 22:05:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:31,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:31,376 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:31,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac3dc74d-8c85-430a-b2ca-d743d89d33a8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:05:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:31,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:05:31,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,590 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:05:31,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:05:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:31,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,661 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:05:31,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:05:31,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,697 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:05:31,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:05:31,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:05:31,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:05:31,890 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 22:05:31,995 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:05:31,995 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 11 treesize of output 11 [2023-11-06 22:05:32,072 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:05:32,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:05:32,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:05:32,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:05:32,753 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-06 22:05:32,753 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 46 treesize of output 19 [2023-11-06 22:05:32,806 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 22:05:32,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:34,422 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:05:34,423 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 132 treesize of output 96 [2023-11-06 22:05:34,529 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:05:34,530 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 1090 treesize of output 1060 [2023-11-06 22:05:34,684 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:05:34,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 497 treesize of output 483 [2023-11-06 22:05:34,810 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:05:34,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 447 treesize of output 383 [2023-11-06 22:05:34,943 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:05:34,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 288 treesize of output 299 [2023-11-06 22:05:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:05:43,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235503964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:43,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:43,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-11-06 22:05:43,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250643565] [2023-11-06 22:05:43,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:43,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:05:43,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:43,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:05:43,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1027, Unknown=14, NotChecked=0, Total=1190 [2023-11-06 22:05:50,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:53,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:05:53,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 489 [2023-11-06 22:05:53,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 347 transitions, 5551 flow. Second operand has 35 states, 35 states have (on average 146.42857142857142) internal successors, (5125), 35 states have internal predecessors, (5125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:53,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:53,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 489 [2023-11-06 22:05:53,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:06:24,908 INFO L124 PetriNetUnfolderBase]: 24789/37257 cut-off events. [2023-11-06 22:06:24,908 INFO L125 PetriNetUnfolderBase]: For 349163/349235 co-relation queries the response was YES. [2023-11-06 22:06:25,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191969 conditions, 37257 events. 24789/37257 cut-off events. For 349163/349235 co-relation queries the response was YES. Maximal size of possible extension queue 1753. Compared 268820 event pairs, 2327 based on Foata normal form. 1845/32190 useless extension candidates. Maximal degree in co-relation 191903. Up to 15151 conditions per place. [2023-11-06 22:06:25,275 INFO L140 encePairwiseOnDemand]: 476/489 looper letters, 1595 selfloop transitions, 662 changer transitions 28/2288 dead transitions. [2023-11-06 22:06:25,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 2288 transitions, 28803 flow [2023-11-06 22:06:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-11-06 22:06:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2023-11-06 22:06:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 16637 transitions. [2023-11-06 22:06:25,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3179672419394912 [2023-11-06 22:06:25,299 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 16637 transitions. [2023-11-06 22:06:25,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 16637 transitions. [2023-11-06 22:06:25,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:06:25,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 16637 transitions. [2023-11-06 22:06:25,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 155.48598130841123) internal successors, (16637), 107 states have internal predecessors, (16637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:25,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 489.0) internal successors, (52812), 108 states have internal predecessors, (52812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:25,379 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 489.0) internal successors, (52812), 108 states have internal predecessors, (52812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:25,379 INFO L175 Difference]: Start difference. First operand has 220 places, 347 transitions, 5551 flow. Second operand 107 states and 16637 transitions. [2023-11-06 22:06:25,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 2288 transitions, 28803 flow