./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b 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_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro --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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:20:35,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:20:35,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:20:35,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:20:35,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:20:35,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:20:35,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:20:35,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:20:35,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:20:35,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:20:35,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:20:35,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:20:35,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:20:35,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:20:35,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:20:35,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:20:35,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:20:35,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:20:35,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:20:35,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:20:35,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:20:35,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:20:35,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:20:35,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:20:35,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:20:35,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:20:35,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:20:35,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:20:35,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:20:35,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:20:35,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:20:35,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:20:35,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:20:35,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:20:35,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:20:35,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:20:35,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:20:35,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:20:35,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:20:35,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:20:35,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:20:35,336 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 20:20:35,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:20:35,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:20:35,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:20:35,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:20:35,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:20:35,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:20:35,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:20:35,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:20:35,360 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:20:35,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:20:35,361 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:20:35,361 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:20:35,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:20:35,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:20:35,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:20:35,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:20:35,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:20:35,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:20:35,364 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 20:20:35,364 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:20:35,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:20:35,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:20:35,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:20:35,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:20:35,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:20:35,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:20:35,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:20:35,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:20:35,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:20:35,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:20:35,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:20:35,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:20:35,368 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:20:35,368 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:20:35,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:20:35,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-11-18 20:20:35,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:20:35,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:20:35,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:20:35,694 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:20:35,694 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:20:35,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-18 20:20:35,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/data/87b1595ee/f4e99720e64644ea8512df0eef0aa12a/FLAG32983c225 [2022-11-18 20:20:36,277 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:20:36,278 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-18 20:20:36,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/data/87b1595ee/f4e99720e64644ea8512df0eef0aa12a/FLAG32983c225 [2022-11-18 20:20:36,624 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/data/87b1595ee/f4e99720e64644ea8512df0eef0aa12a [2022-11-18 20:20:36,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:20:36,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:20:36,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:20:36,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:20:36,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:20:36,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:36,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff1988c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36, skipping insertion in model container [2022-11-18 20:20:36,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:36,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:20:36,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:20:36,897 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-18 20:20:36,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:20:36,910 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:20:36,934 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-18 20:20:36,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:20:36,951 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:20:36,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36 WrapperNode [2022-11-18 20:20:36,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:20:36,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:20:36,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:20:36,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:20:36,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:36,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:37,016 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 152 [2022-11-18 20:20:37,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:20:37,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:20:37,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:20:37,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:20:37,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:37,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:37,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:37,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:37,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:37,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:37,047 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:37,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:37,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:20:37,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:20:37,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:20:37,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:20:37,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (1/1) ... [2022-11-18 20:20:37,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:20:37,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:37,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:20:37,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:20:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:20:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:20:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:20:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:20:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:20:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:20:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:20:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:20:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:20:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:20:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:20:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:20:37,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:20:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:20:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:20:37,149 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:20:37,287 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:20:37,289 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:20:37,668 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:20:37,865 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:20:37,865 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:20:37,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:20:37 BoogieIcfgContainer [2022-11-18 20:20:37,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:20:37,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:20:37,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:20:37,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:20:37,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:20:36" (1/3) ... [2022-11-18 20:20:37,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441ef75b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:20:37, skipping insertion in model container [2022-11-18 20:20:37,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:20:36" (2/3) ... [2022-11-18 20:20:37,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441ef75b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:20:37, skipping insertion in model container [2022-11-18 20:20:37,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:20:37" (3/3) ... [2022-11-18 20:20:37,877 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-11-18 20:20:37,886 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:20:37,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:20:37,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-18 20:20:37,897 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:20:37,966 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:20:38,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2022-11-18 20:20:38,092 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2022-11-18 20:20:38,093 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:20:38,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 128 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-11-18 20:20:38,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2022-11-18 20:20:38,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 123 transitions, 255 flow [2022-11-18 20:20:38,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:20:38,129 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;@458cf3c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:20:38,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-18 20:20:38,165 INFO L130 PetriNetUnfolder]: 3/64 cut-off events. [2022-11-18 20:20:38,165 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:20:38,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:38,167 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:38,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:38,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:38,179 INFO L85 PathProgramCache]: Analyzing trace with hash -91479810, now seen corresponding path program 1 times [2022-11-18 20:20:38,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:38,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249571542] [2022-11-18 20:20:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:38,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:38,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249571542] [2022-11-18 20:20:38,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249571542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:38,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:20:38,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:20:38,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311040188] [2022-11-18 20:20:38,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:38,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:20:38,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:38,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:20:38,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:20:38,671 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-11-18 20:20:38,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:38,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:38,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-11-18 20:20:38,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:38,914 INFO L130 PetriNetUnfolder]: 73/312 cut-off events. [2022-11-18 20:20:38,914 INFO L131 PetriNetUnfolder]: For 52/58 co-relation queries the response was YES. [2022-11-18 20:20:38,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 312 events. 73/312 cut-off events. For 52/58 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1152 event pairs, 46 based on Foata normal form. 28/222 useless extension candidates. Maximal degree in co-relation 164. Up to 82 conditions per place. [2022-11-18 20:20:38,922 INFO L137 encePairwiseOnDemand]: 131/144 looper letters, 42 selfloop transitions, 4 changer transitions 2/137 dead transitions. [2022-11-18 20:20:38,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 137 transitions, 384 flow [2022-11-18 20:20:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:20:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:20:38,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2022-11-18 20:20:38,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8402777777777778 [2022-11-18 20:20:38,950 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2022-11-18 20:20:38,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2022-11-18 20:20:38,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:38,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2022-11-18 20:20:38,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:38,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:38,973 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:38,975 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 255 flow. Second operand 5 states and 605 transitions. [2022-11-18 20:20:38,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 137 transitions, 384 flow [2022-11-18 20:20:38,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 137 transitions, 374 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 20:20:38,985 INFO L231 Difference]: Finished difference. Result has 123 places, 117 transitions, 262 flow [2022-11-18 20:20:38,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=123, PETRI_TRANSITIONS=117} [2022-11-18 20:20:38,993 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 3 predicate places. [2022-11-18 20:20:38,994 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 117 transitions, 262 flow [2022-11-18 20:20:38,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:38,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:38,995 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:38,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:20:38,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1957084932, now seen corresponding path program 1 times [2022-11-18 20:20:39,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:39,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598402718] [2022-11-18 20:20:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:39,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:39,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:39,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598402718] [2022-11-18 20:20:39,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598402718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:39,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:20:39,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:20:39,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553098352] [2022-11-18 20:20:39,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:39,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:20:39,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:20:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:20:39,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 144 [2022-11-18 20:20:39,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 117 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:39,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:39,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 144 [2022-11-18 20:20:39,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:39,605 INFO L130 PetriNetUnfolder]: 77/382 cut-off events. [2022-11-18 20:20:39,606 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-18 20:20:39,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 382 events. 77/382 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1576 event pairs, 28 based on Foata normal form. 14/276 useless extension candidates. Maximal degree in co-relation 302. Up to 102 conditions per place. [2022-11-18 20:20:39,611 INFO L137 encePairwiseOnDemand]: 131/144 looper letters, 20 selfloop transitions, 9 changer transitions 0/125 dead transitions. [2022-11-18 20:20:39,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 125 transitions, 337 flow [2022-11-18 20:20:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:20:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:20:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2022-11-18 20:20:39,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2022-11-18 20:20:39,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2022-11-18 20:20:39,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2022-11-18 20:20:39,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:39,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2022-11-18 20:20:39,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:39,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:39,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:39,619 INFO L175 Difference]: Start difference. First operand has 123 places, 117 transitions, 262 flow. Second operand 3 states and 372 transitions. [2022-11-18 20:20:39,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 125 transitions, 337 flow [2022-11-18 20:20:39,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 125 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:20:39,625 INFO L231 Difference]: Finished difference. Result has 124 places, 121 transitions, 320 flow [2022-11-18 20:20:39,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2022-11-18 20:20:39,627 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 4 predicate places. [2022-11-18 20:20:39,627 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 320 flow [2022-11-18 20:20:39,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:39,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:39,628 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:39,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:20:39,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:39,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1418594356, now seen corresponding path program 1 times [2022-11-18 20:20:39,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:39,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670892693] [2022-11-18 20:20:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:39,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:39,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:39,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670892693] [2022-11-18 20:20:39,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670892693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:39,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016421544] [2022-11-18 20:20:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:39,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:39,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:39,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:39,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:20:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:39,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:20:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:40,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:40,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016421544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:40,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:40,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 20:20:40,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102533792] [2022-11-18 20:20:40,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:40,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:20:40,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:20:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:20:40,113 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-11-18 20:20:40,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 320 flow. Second operand has 12 states, 12 states have (on average 111.66666666666667) internal successors, (1340), 12 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:40,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:40,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-11-18 20:20:40,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:40,551 INFO L130 PetriNetUnfolder]: 161/772 cut-off events. [2022-11-18 20:20:40,552 INFO L131 PetriNetUnfolder]: For 344/644 co-relation queries the response was YES. [2022-11-18 20:20:40,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 772 events. 161/772 cut-off events. For 344/644 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4120 event pairs, 65 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 568. Up to 133 conditions per place. [2022-11-18 20:20:40,558 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 113 selfloop transitions, 18 changer transitions 0/220 dead transitions. [2022-11-18 20:20:40,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 220 transitions, 946 flow [2022-11-18 20:20:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:20:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:20:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2076 transitions. [2022-11-18 20:20:40,564 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8009259259259259 [2022-11-18 20:20:40,564 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2076 transitions. [2022-11-18 20:20:40,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2076 transitions. [2022-11-18 20:20:40,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:40,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2076 transitions. [2022-11-18 20:20:40,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 115.33333333333333) internal successors, (2076), 18 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:40,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 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) [2022-11-18 20:20:40,579 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 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) [2022-11-18 20:20:40,580 INFO L175 Difference]: Start difference. First operand has 124 places, 121 transitions, 320 flow. Second operand 18 states and 2076 transitions. [2022-11-18 20:20:40,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 220 transitions, 946 flow [2022-11-18 20:20:40,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 220 transitions, 896 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 20:20:40,587 INFO L231 Difference]: Finished difference. Result has 143 places, 133 transitions, 408 flow [2022-11-18 20:20:40,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=408, PETRI_PLACES=143, PETRI_TRANSITIONS=133} [2022-11-18 20:20:40,588 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 23 predicate places. [2022-11-18 20:20:40,588 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 133 transitions, 408 flow [2022-11-18 20:20:40,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.66666666666667) internal successors, (1340), 12 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:40,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:40,589 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:40,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:40,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-18 20:20:40,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1026751657, now seen corresponding path program 1 times [2022-11-18 20:20:40,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:40,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458142578] [2022-11-18 20:20:40,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:40,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:40,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:40,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458142578] [2022-11-18 20:20:40,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458142578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:40,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821859420] [2022-11-18 20:20:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:40,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:40,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:40,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:40,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:20:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:41,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:20:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:41,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:20:41,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821859420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:41,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:20:41,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 20:20:41,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055295477] [2022-11-18 20:20:41,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:41,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:20:41,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:41,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:20:41,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:20:41,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-11-18 20:20:41,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 133 transitions, 408 flow. Second operand has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:41,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:41,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-11-18 20:20:41,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:41,325 INFO L130 PetriNetUnfolder]: 161/768 cut-off events. [2022-11-18 20:20:41,325 INFO L131 PetriNetUnfolder]: For 167/317 co-relation queries the response was YES. [2022-11-18 20:20:41,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1406 conditions, 768 events. 161/768 cut-off events. For 167/317 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4104 event pairs, 65 based on Foata normal form. 4/517 useless extension candidates. Maximal degree in co-relation 1109. Up to 272 conditions per place. [2022-11-18 20:20:41,331 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 51 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2022-11-18 20:20:41,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 151 transitions, 579 flow [2022-11-18 20:20:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:20:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:20:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 809 transitions. [2022-11-18 20:20:41,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8025793650793651 [2022-11-18 20:20:41,334 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 809 transitions. [2022-11-18 20:20:41,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 809 transitions. [2022-11-18 20:20:41,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:41,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 809 transitions. [2022-11-18 20:20:41,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:41,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:41,340 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:41,340 INFO L175 Difference]: Start difference. First operand has 143 places, 133 transitions, 408 flow. Second operand 7 states and 809 transitions. [2022-11-18 20:20:41,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 151 transitions, 579 flow [2022-11-18 20:20:41,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 151 transitions, 547 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-18 20:20:41,345 INFO L231 Difference]: Finished difference. Result has 139 places, 129 transitions, 371 flow [2022-11-18 20:20:41,346 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=371, PETRI_PLACES=139, PETRI_TRANSITIONS=129} [2022-11-18 20:20:41,346 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 19 predicate places. [2022-11-18 20:20:41,347 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 129 transitions, 371 flow [2022-11-18 20:20:41,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:41,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:41,347 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:41,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:41,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:41,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1814544975, now seen corresponding path program 1 times [2022-11-18 20:20:41,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:41,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056864069] [2022-11-18 20:20:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:41,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:41,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:41,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056864069] [2022-11-18 20:20:41,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056864069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:41,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:20:41,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:20:41,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352895239] [2022-11-18 20:20:41,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:41,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:20:41,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:41,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:20:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:20:41,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 144 [2022-11-18 20:20:41,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 129 transitions, 371 flow. Second operand has 9 states, 9 states have (on average 102.11111111111111) internal successors, (919), 9 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:41,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:41,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 144 [2022-11-18 20:20:41,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:42,376 INFO L130 PetriNetUnfolder]: 309/1090 cut-off events. [2022-11-18 20:20:42,376 INFO L131 PetriNetUnfolder]: For 241/241 co-relation queries the response was YES. [2022-11-18 20:20:42,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 1090 events. 309/1090 cut-off events. For 241/241 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 6783 event pairs, 138 based on Foata normal form. 4/798 useless extension candidates. Maximal degree in co-relation 1696. Up to 399 conditions per place. [2022-11-18 20:20:42,383 INFO L137 encePairwiseOnDemand]: 127/144 looper letters, 55 selfloop transitions, 19 changer transitions 4/161 dead transitions. [2022-11-18 20:20:42,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 161 transitions, 617 flow [2022-11-18 20:20:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:20:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-18 20:20:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1174 transitions. [2022-11-18 20:20:42,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7411616161616161 [2022-11-18 20:20:42,388 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1174 transitions. [2022-11-18 20:20:42,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1174 transitions. [2022-11-18 20:20:42,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:42,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1174 transitions. [2022-11-18 20:20:42,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.72727272727273) internal successors, (1174), 11 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,396 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,396 INFO L175 Difference]: Start difference. First operand has 139 places, 129 transitions, 371 flow. Second operand 11 states and 1174 transitions. [2022-11-18 20:20:42,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 161 transitions, 617 flow [2022-11-18 20:20:42,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 161 transitions, 603 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 20:20:42,402 INFO L231 Difference]: Finished difference. Result has 150 places, 137 transitions, 460 flow [2022-11-18 20:20:42,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=460, PETRI_PLACES=150, PETRI_TRANSITIONS=137} [2022-11-18 20:20:42,405 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 30 predicate places. [2022-11-18 20:20:42,405 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 137 transitions, 460 flow [2022-11-18 20:20:42,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 102.11111111111111) internal successors, (919), 9 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:42,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:42,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:20:42,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1814544974, now seen corresponding path program 1 times [2022-11-18 20:20:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:42,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739015514] [2022-11-18 20:20:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:42,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:42,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:42,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739015514] [2022-11-18 20:20:42,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739015514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:42,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:20:42,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:20:42,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893853208] [2022-11-18 20:20:42,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:42,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:20:42,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:42,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:20:42,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:20:42,542 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 144 [2022-11-18 20:20:42,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 137 transitions, 460 flow. Second operand has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:42,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 144 [2022-11-18 20:20:42,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:42,742 INFO L130 PetriNetUnfolder]: 159/728 cut-off events. [2022-11-18 20:20:42,742 INFO L131 PetriNetUnfolder]: For 707/949 co-relation queries the response was YES. [2022-11-18 20:20:42,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1438 conditions, 728 events. 159/728 cut-off events. For 707/949 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3627 event pairs, 78 based on Foata normal form. 42/610 useless extension candidates. Maximal degree in co-relation 1137. Up to 303 conditions per place. [2022-11-18 20:20:42,748 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 20 selfloop transitions, 4 changer transitions 0/131 dead transitions. [2022-11-18 20:20:42,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 131 transitions, 466 flow [2022-11-18 20:20:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:20:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:20:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2022-11-18 20:20:42,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8138888888888889 [2022-11-18 20:20:42,750 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2022-11-18 20:20:42,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2022-11-18 20:20:42,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:42,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2022-11-18 20:20:42,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,754 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,754 INFO L175 Difference]: Start difference. First operand has 150 places, 137 transitions, 460 flow. Second operand 5 states and 586 transitions. [2022-11-18 20:20:42,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 131 transitions, 466 flow [2022-11-18 20:20:42,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 131 transitions, 450 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 20:20:42,758 INFO L231 Difference]: Finished difference. Result has 148 places, 131 transitions, 410 flow [2022-11-18 20:20:42,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=410, PETRI_PLACES=148, PETRI_TRANSITIONS=131} [2022-11-18 20:20:42,759 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 28 predicate places. [2022-11-18 20:20:42,760 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 131 transitions, 410 flow [2022-11-18 20:20:42,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:42,760 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:42,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:20:42,761 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash -650459216, now seen corresponding path program 1 times [2022-11-18 20:20:42,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:42,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085211896] [2022-11-18 20:20:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:42,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:42,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:42,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085211896] [2022-11-18 20:20:42,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085211896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:42,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:20:42,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:20:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708144007] [2022-11-18 20:20:42,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:42,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:20:42,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:20:42,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:20:42,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 144 [2022-11-18 20:20:42,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 131 transitions, 410 flow. Second operand has 4 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:42,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:42,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 144 [2022-11-18 20:20:42,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:43,129 INFO L130 PetriNetUnfolder]: 264/1153 cut-off events. [2022-11-18 20:20:43,129 INFO L131 PetriNetUnfolder]: For 423/605 co-relation queries the response was YES. [2022-11-18 20:20:43,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2293 conditions, 1153 events. 264/1153 cut-off events. For 423/605 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7068 event pairs, 103 based on Foata normal form. 2/885 useless extension candidates. Maximal degree in co-relation 2240. Up to 263 conditions per place. [2022-11-18 20:20:43,138 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 20 selfloop transitions, 10 changer transitions 0/140 dead transitions. [2022-11-18 20:20:43,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 140 transitions, 505 flow [2022-11-18 20:20:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:20:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:20:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2022-11-18 20:20:43,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8416666666666667 [2022-11-18 20:20:43,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2022-11-18 20:20:43,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2022-11-18 20:20:43,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:43,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2022-11-18 20:20:43,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:43,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:43,146 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:43,147 INFO L175 Difference]: Start difference. First operand has 148 places, 131 transitions, 410 flow. Second operand 5 states and 606 transitions. [2022-11-18 20:20:43,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 140 transitions, 505 flow [2022-11-18 20:20:43,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 140 transitions, 497 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:20:43,152 INFO L231 Difference]: Finished difference. Result has 150 places, 134 transitions, 457 flow [2022-11-18 20:20:43,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=457, PETRI_PLACES=150, PETRI_TRANSITIONS=134} [2022-11-18 20:20:43,153 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 30 predicate places. [2022-11-18 20:20:43,153 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 134 transitions, 457 flow [2022-11-18 20:20:43,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:43,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:43,154 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:43,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:20:43,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:43,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash -650459218, now seen corresponding path program 1 times [2022-11-18 20:20:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:43,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680104253] [2022-11-18 20:20:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:43,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:43,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:43,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680104253] [2022-11-18 20:20:43,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680104253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:43,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:20:43,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 20:20:43,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765989] [2022-11-18 20:20:43,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:43,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:20:43,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:43,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:20:43,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:20:43,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 144 [2022-11-18 20:20:43,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 134 transitions, 457 flow. Second operand has 10 states, 10 states have (on average 100.2) internal successors, (1002), 10 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:43,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:43,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 144 [2022-11-18 20:20:43,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:44,205 INFO L130 PetriNetUnfolder]: 531/1947 cut-off events. [2022-11-18 20:20:44,205 INFO L131 PetriNetUnfolder]: For 1480/1480 co-relation queries the response was YES. [2022-11-18 20:20:44,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4402 conditions, 1947 events. 531/1947 cut-off events. For 1480/1480 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 14073 event pairs, 208 based on Foata normal form. 16/1711 useless extension candidates. Maximal degree in co-relation 4080. Up to 681 conditions per place. [2022-11-18 20:20:44,221 INFO L137 encePairwiseOnDemand]: 132/144 looper letters, 73 selfloop transitions, 10 changer transitions 1/165 dead transitions. [2022-11-18 20:20:44,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 165 transitions, 745 flow [2022-11-18 20:20:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:20:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 20:20:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1054 transitions. [2022-11-18 20:20:44,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7319444444444444 [2022-11-18 20:20:44,224 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1054 transitions. [2022-11-18 20:20:44,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1054 transitions. [2022-11-18 20:20:44,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:44,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1054 transitions. [2022-11-18 20:20:44,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.4) internal successors, (1054), 10 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:44,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 144.0) internal successors, (1584), 11 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:44,231 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 144.0) internal successors, (1584), 11 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:44,232 INFO L175 Difference]: Start difference. First operand has 150 places, 134 transitions, 457 flow. Second operand 10 states and 1054 transitions. [2022-11-18 20:20:44,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 165 transitions, 745 flow [2022-11-18 20:20:44,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 165 transitions, 740 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 20:20:44,239 INFO L231 Difference]: Finished difference. Result has 159 places, 135 transitions, 493 flow [2022-11-18 20:20:44,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=493, PETRI_PLACES=159, PETRI_TRANSITIONS=135} [2022-11-18 20:20:44,240 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 39 predicate places. [2022-11-18 20:20:44,240 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 135 transitions, 493 flow [2022-11-18 20:20:44,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.2) internal successors, (1002), 10 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:44,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:44,241 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:44,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:20:44,242 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -575646813, now seen corresponding path program 1 times [2022-11-18 20:20:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:44,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540235535] [2022-11-18 20:20:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:44,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:44,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540235535] [2022-11-18 20:20:44,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540235535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:44,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848652362] [2022-11-18 20:20:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:44,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:44,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:44,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:44,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:20:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:44,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:20:44,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:44,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:20:44,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848652362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:44,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:20:44,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-18 20:20:44,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781000478] [2022-11-18 20:20:44,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:44,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:20:44,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:44,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:20:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:20:44,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 144 [2022-11-18 20:20:44,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 135 transitions, 493 flow. Second operand has 7 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:44,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:44,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 144 [2022-11-18 20:20:44,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:45,384 INFO L130 PetriNetUnfolder]: 385/1323 cut-off events. [2022-11-18 20:20:45,384 INFO L131 PetriNetUnfolder]: For 1647/1647 co-relation queries the response was YES. [2022-11-18 20:20:45,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3295 conditions, 1323 events. 385/1323 cut-off events. For 1647/1647 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8505 event pairs, 17 based on Foata normal form. 116/1260 useless extension candidates. Maximal degree in co-relation 3158. Up to 339 conditions per place. [2022-11-18 20:20:45,394 INFO L137 encePairwiseOnDemand]: 131/144 looper letters, 27 selfloop transitions, 14 changer transitions 12/150 dead transitions. [2022-11-18 20:20:45,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 150 transitions, 711 flow [2022-11-18 20:20:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:20:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:20:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1011 transitions. [2022-11-18 20:20:45,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7800925925925926 [2022-11-18 20:20:45,397 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1011 transitions. [2022-11-18 20:20:45,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1011 transitions. [2022-11-18 20:20:45,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:45,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1011 transitions. [2022-11-18 20:20:45,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:45,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:45,405 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:45,405 INFO L175 Difference]: Start difference. First operand has 159 places, 135 transitions, 493 flow. Second operand 9 states and 1011 transitions. [2022-11-18 20:20:45,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 150 transitions, 711 flow [2022-11-18 20:20:45,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 150 transitions, 688 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-18 20:20:45,416 INFO L231 Difference]: Finished difference. Result has 156 places, 123 transitions, 437 flow [2022-11-18 20:20:45,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=437, PETRI_PLACES=156, PETRI_TRANSITIONS=123} [2022-11-18 20:20:45,417 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 36 predicate places. [2022-11-18 20:20:45,418 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 123 transitions, 437 flow [2022-11-18 20:20:45,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:45,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:45,419 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:45,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 20:20:45,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:45,624 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1035491038, now seen corresponding path program 1 times [2022-11-18 20:20:45,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:45,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278047942] [2022-11-18 20:20:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:45,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:45,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:45,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278047942] [2022-11-18 20:20:45,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278047942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:45,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:20:45,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:20:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291511105] [2022-11-18 20:20:45,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:45,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:20:45,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:45,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:20:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:20:45,874 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 144 [2022-11-18 20:20:45,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 123 transitions, 437 flow. Second operand has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:45,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:45,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 144 [2022-11-18 20:20:45,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:46,199 INFO L130 PetriNetUnfolder]: 341/1221 cut-off events. [2022-11-18 20:20:46,199 INFO L131 PetriNetUnfolder]: For 2165/2453 co-relation queries the response was YES. [2022-11-18 20:20:46,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3243 conditions, 1221 events. 341/1221 cut-off events. For 2165/2453 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6749 event pairs, 68 based on Foata normal form. 16/973 useless extension candidates. Maximal degree in co-relation 3132. Up to 339 conditions per place. [2022-11-18 20:20:46,213 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 34 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2022-11-18 20:20:46,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 136 transitions, 595 flow [2022-11-18 20:20:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:20:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:20:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2022-11-18 20:20:46,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7833333333333333 [2022-11-18 20:20:46,216 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2022-11-18 20:20:46,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2022-11-18 20:20:46,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:46,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2022-11-18 20:20:46,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:46,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:46,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:46,221 INFO L175 Difference]: Start difference. First operand has 156 places, 123 transitions, 437 flow. Second operand 5 states and 564 transitions. [2022-11-18 20:20:46,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 136 transitions, 595 flow [2022-11-18 20:20:46,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 136 transitions, 527 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-11-18 20:20:46,228 INFO L231 Difference]: Finished difference. Result has 140 places, 124 transitions, 421 flow [2022-11-18 20:20:46,229 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=421, PETRI_PLACES=140, PETRI_TRANSITIONS=124} [2022-11-18 20:20:46,230 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 20 predicate places. [2022-11-18 20:20:46,230 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 124 transitions, 421 flow [2022-11-18 20:20:46,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:46,231 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:46,231 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:46,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:20:46,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash 711723291, now seen corresponding path program 1 times [2022-11-18 20:20:46,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:46,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605101833] [2022-11-18 20:20:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:46,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:46,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:46,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605101833] [2022-11-18 20:20:46,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605101833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:46,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:20:46,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:20:46,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823246659] [2022-11-18 20:20:46,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:46,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:20:46,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:20:46,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:20:46,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 144 [2022-11-18 20:20:46,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 124 transitions, 421 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:46,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:46,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 144 [2022-11-18 20:20:46,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:46,461 INFO L130 PetriNetUnfolder]: 161/845 cut-off events. [2022-11-18 20:20:46,461 INFO L131 PetriNetUnfolder]: For 664/664 co-relation queries the response was YES. [2022-11-18 20:20:46,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1770 conditions, 845 events. 161/845 cut-off events. For 664/664 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4055 event pairs, 48 based on Foata normal form. 0/737 useless extension candidates. Maximal degree in co-relation 1676. Up to 277 conditions per place. [2022-11-18 20:20:46,468 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 20 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2022-11-18 20:20:46,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 128 transitions, 477 flow [2022-11-18 20:20:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:20:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:20:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2022-11-18 20:20:46,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8541666666666666 [2022-11-18 20:20:46,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2022-11-18 20:20:46,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2022-11-18 20:20:46,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:46,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2022-11-18 20:20:46,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:46,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:46,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:46,473 INFO L175 Difference]: Start difference. First operand has 140 places, 124 transitions, 421 flow. Second operand 3 states and 369 transitions. [2022-11-18 20:20:46,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 128 transitions, 477 flow [2022-11-18 20:20:46,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 128 transitions, 465 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:20:46,477 INFO L231 Difference]: Finished difference. Result has 139 places, 123 transitions, 400 flow [2022-11-18 20:20:46,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=139, PETRI_TRANSITIONS=123} [2022-11-18 20:20:46,478 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 19 predicate places. [2022-11-18 20:20:46,478 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 123 transitions, 400 flow [2022-11-18 20:20:46,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:46,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:46,478 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:46,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:20:46,479 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:46,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1633337218, now seen corresponding path program 2 times [2022-11-18 20:20:46,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:46,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661845432] [2022-11-18 20:20:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:46,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:46,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:46,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661845432] [2022-11-18 20:20:46,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661845432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:46,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292395987] [2022-11-18 20:20:46,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:20:46,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:46,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:46,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:46,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:20:46,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:20:46,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:46,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:20:46,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 20:20:47,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 20:20:47,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292395987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:47,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:47,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-18 20:20:47,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425348519] [2022-11-18 20:20:47,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:47,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:20:47,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:47,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:20:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:20:47,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 144 [2022-11-18 20:20:47,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 123 transitions, 400 flow. Second operand has 18 states, 18 states have (on average 101.61111111111111) internal successors, (1829), 18 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:47,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:47,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 144 [2022-11-18 20:20:47,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:47,889 INFO L130 PetriNetUnfolder]: 139/871 cut-off events. [2022-11-18 20:20:47,890 INFO L131 PetriNetUnfolder]: For 705/849 co-relation queries the response was YES. [2022-11-18 20:20:47,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 871 events. 139/871 cut-off events. For 705/849 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4162 event pairs, 42 based on Foata normal form. 2/759 useless extension candidates. Maximal degree in co-relation 1754. Up to 201 conditions per place. [2022-11-18 20:20:47,897 INFO L137 encePairwiseOnDemand]: 133/144 looper letters, 114 selfloop transitions, 25 changer transitions 0/216 dead transitions. [2022-11-18 20:20:47,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 216 transitions, 1193 flow [2022-11-18 20:20:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:20:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 20:20:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2463 transitions. [2022-11-18 20:20:47,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7126736111111112 [2022-11-18 20:20:47,905 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2463 transitions. [2022-11-18 20:20:47,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2463 transitions. [2022-11-18 20:20:47,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:47,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2463 transitions. [2022-11-18 20:20:47,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 102.625) internal successors, (2463), 24 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:47,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:47,922 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:47,922 INFO L175 Difference]: Start difference. First operand has 139 places, 123 transitions, 400 flow. Second operand 24 states and 2463 transitions. [2022-11-18 20:20:47,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 216 transitions, 1193 flow [2022-11-18 20:20:47,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 216 transitions, 1183 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 20:20:47,927 INFO L231 Difference]: Finished difference. Result has 157 places, 127 transitions, 459 flow [2022-11-18 20:20:47,928 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=459, PETRI_PLACES=157, PETRI_TRANSITIONS=127} [2022-11-18 20:20:47,929 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 37 predicate places. [2022-11-18 20:20:47,929 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 127 transitions, 459 flow [2022-11-18 20:20:47,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 101.61111111111111) internal successors, (1829), 18 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:47,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:47,930 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:47,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:48,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:20:48,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1414798911, now seen corresponding path program 1 times [2022-11-18 20:20:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:48,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246398450] [2022-11-18 20:20:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:48,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:48,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:48,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246398450] [2022-11-18 20:20:48,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246398450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:48,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565446750] [2022-11-18 20:20:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:48,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:48,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:48,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:20:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:20:48,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:48,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:20:48,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565446750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:48,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:20:48,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-18 20:20:48,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956027536] [2022-11-18 20:20:48,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:48,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:20:48,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:48,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:20:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:20:48,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 144 [2022-11-18 20:20:48,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 127 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:48,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:48,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 144 [2022-11-18 20:20:48,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:48,801 INFO L130 PetriNetUnfolder]: 211/1423 cut-off events. [2022-11-18 20:20:48,802 INFO L131 PetriNetUnfolder]: For 1140/1284 co-relation queries the response was YES. [2022-11-18 20:20:48,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 1423 events. 211/1423 cut-off events. For 1140/1284 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8447 event pairs, 30 based on Foata normal form. 36/1309 useless extension candidates. Maximal degree in co-relation 464. Up to 285 conditions per place. [2022-11-18 20:20:48,812 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 19 selfloop transitions, 8 changer transitions 0/137 dead transitions. [2022-11-18 20:20:48,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 137 transitions, 578 flow [2022-11-18 20:20:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:20:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 20:20:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 488 transitions. [2022-11-18 20:20:48,814 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8472222222222222 [2022-11-18 20:20:48,814 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 488 transitions. [2022-11-18 20:20:48,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 488 transitions. [2022-11-18 20:20:48,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:48,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 488 transitions. [2022-11-18 20:20:48,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:48,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:48,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:48,818 INFO L175 Difference]: Start difference. First operand has 157 places, 127 transitions, 459 flow. Second operand 4 states and 488 transitions. [2022-11-18 20:20:48,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 137 transitions, 578 flow [2022-11-18 20:20:48,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 137 transitions, 520 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-18 20:20:48,823 INFO L231 Difference]: Finished difference. Result has 145 places, 133 transitions, 497 flow [2022-11-18 20:20:48,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=497, PETRI_PLACES=145, PETRI_TRANSITIONS=133} [2022-11-18 20:20:48,824 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 25 predicate places. [2022-11-18 20:20:48,825 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 133 transitions, 497 flow [2022-11-18 20:20:48,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:48,825 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:48,826 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:48,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:49,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:49,032 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:49,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2140736127, now seen corresponding path program 1 times [2022-11-18 20:20:49,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:49,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158702446] [2022-11-18 20:20:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:49,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:20:49,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:49,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158702446] [2022-11-18 20:20:49,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158702446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:49,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:20:49,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:20:49,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581658103] [2022-11-18 20:20:49,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:49,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:20:49,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:49,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:20:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:20:49,251 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 144 [2022-11-18 20:20:49,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 133 transitions, 497 flow. Second operand has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:49,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:49,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 144 [2022-11-18 20:20:49,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:49,774 INFO L130 PetriNetUnfolder]: 385/2641 cut-off events. [2022-11-18 20:20:49,775 INFO L131 PetriNetUnfolder]: For 3192/3192 co-relation queries the response was YES. [2022-11-18 20:20:49,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 2641 events. 385/2641 cut-off events. For 3192/3192 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 20419 event pairs, 66 based on Foata normal form. 96/2437 useless extension candidates. Maximal degree in co-relation 974. Up to 525 conditions per place. [2022-11-18 20:20:49,807 INFO L137 encePairwiseOnDemand]: 140/144 looper letters, 27 selfloop transitions, 4 changer transitions 0/141 dead transitions. [2022-11-18 20:20:49,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 141 transitions, 641 flow [2022-11-18 20:20:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:20:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 20:20:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 485 transitions. [2022-11-18 20:20:49,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8420138888888888 [2022-11-18 20:20:49,809 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 485 transitions. [2022-11-18 20:20:49,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 485 transitions. [2022-11-18 20:20:49,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:49,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 485 transitions. [2022-11-18 20:20:49,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:49,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:49,813 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:49,813 INFO L175 Difference]: Start difference. First operand has 145 places, 133 transitions, 497 flow. Second operand 4 states and 485 transitions. [2022-11-18 20:20:49,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 141 transitions, 641 flow [2022-11-18 20:20:49,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 141 transitions, 634 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 20:20:49,819 INFO L231 Difference]: Finished difference. Result has 149 places, 134 transitions, 513 flow [2022-11-18 20:20:49,819 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=513, PETRI_PLACES=149, PETRI_TRANSITIONS=134} [2022-11-18 20:20:49,820 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 29 predicate places. [2022-11-18 20:20:49,820 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 134 transitions, 513 flow [2022-11-18 20:20:49,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:49,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:49,821 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:49,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 20:20:49,822 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:49,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1445128647, now seen corresponding path program 1 times [2022-11-18 20:20:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:49,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648375160] [2022-11-18 20:20:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:50,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:50,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648375160] [2022-11-18 20:20:50,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648375160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:50,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485463385] [2022-11-18 20:20:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:50,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:50,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:50,248 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:50,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:20:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:50,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:20:50,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:50,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:51,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485463385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:51,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:51,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 30 [2022-11-18 20:20:51,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088252764] [2022-11-18 20:20:51,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:51,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:20:51,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:51,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:20:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:20:51,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 144 [2022-11-18 20:20:51,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 134 transitions, 513 flow. Second operand has 30 states, 30 states have (on average 96.16666666666667) internal successors, (2885), 30 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:51,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:51,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 144 [2022-11-18 20:20:51,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:53,323 INFO L130 PetriNetUnfolder]: 648/2593 cut-off events. [2022-11-18 20:20:53,323 INFO L131 PetriNetUnfolder]: For 6300/6300 co-relation queries the response was YES. [2022-11-18 20:20:53,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7578 conditions, 2593 events. 648/2593 cut-off events. For 6300/6300 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 18061 event pairs, 345 based on Foata normal form. 82/2324 useless extension candidates. Maximal degree in co-relation 1378. Up to 1235 conditions per place. [2022-11-18 20:20:53,349 INFO L137 encePairwiseOnDemand]: 122/144 looper letters, 60 selfloop transitions, 21 changer transitions 53/207 dead transitions. [2022-11-18 20:20:53,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 207 transitions, 1065 flow [2022-11-18 20:20:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:20:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-18 20:20:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2836 transitions. [2022-11-18 20:20:53,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6791187739463601 [2022-11-18 20:20:53,357 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2836 transitions. [2022-11-18 20:20:53,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2836 transitions. [2022-11-18 20:20:53,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:53,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2836 transitions. [2022-11-18 20:20:53,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 97.79310344827586) internal successors, (2836), 29 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:53,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 144.0) internal successors, (4320), 30 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:53,373 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 144.0) internal successors, (4320), 30 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:53,373 INFO L175 Difference]: Start difference. First operand has 149 places, 134 transitions, 513 flow. Second operand 29 states and 2836 transitions. [2022-11-18 20:20:53,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 207 transitions, 1065 flow [2022-11-18 20:20:53,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 207 transitions, 1060 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 20:20:53,382 INFO L231 Difference]: Finished difference. Result has 190 places, 135 transitions, 648 flow [2022-11-18 20:20:53,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=648, PETRI_PLACES=190, PETRI_TRANSITIONS=135} [2022-11-18 20:20:53,383 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 70 predicate places. [2022-11-18 20:20:53,383 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 135 transitions, 648 flow [2022-11-18 20:20:53,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 96.16666666666667) internal successors, (2885), 30 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:53,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:53,384 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:53,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:53,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:20:53,591 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:20:53,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:53,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1635239813, now seen corresponding path program 2 times [2022-11-18 20:20:53,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:53,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242022649] [2022-11-18 20:20:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:53,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:20:53,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:53,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242022649] [2022-11-18 20:20:53,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242022649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:53,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814934310] [2022-11-18 20:20:53,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:20:53,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:53,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:53,960 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:53,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:20:54,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:20:54,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 20:20:54,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:54,689 INFO L350 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 11 [2022-11-18 20:20:55,063 INFO L350 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 6 treesize of output 5 [2022-11-18 20:20:55,146 INFO L350 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 6 treesize of output 5 [2022-11-18 20:20:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:55,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:57,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:20:57,651 INFO L350 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 63 treesize of output 51 [2022-11-18 20:20:57,688 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-18 20:20:57,689 INFO L350 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 152 treesize of output 144 [2022-11-18 20:20:57,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:20:57,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 95 [2022-11-18 20:20:57,734 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-18 20:20:57,734 INFO L350 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 122 treesize of output 96 [2022-11-18 20:20:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:58,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814934310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:58,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:58,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 22, 19] total 44 [2022-11-18 20:20:58,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713827190] [2022-11-18 20:20:58,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:58,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:20:58,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:20:58,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1470, Unknown=24, NotChecked=0, Total=1980 [2022-11-18 20:20:58,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 144 [2022-11-18 20:20:58,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 135 transitions, 648 flow. Second operand has 45 states, 45 states have (on average 75.88888888888889) internal successors, (3415), 45 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:58,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:58,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 144 [2022-11-18 20:20:58,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:01,618 INFO L130 PetriNetUnfolder]: 1369/4567 cut-off events. [2022-11-18 20:21:01,619 INFO L131 PetriNetUnfolder]: For 34124/34986 co-relation queries the response was YES. [2022-11-18 20:21:01,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20388 conditions, 4567 events. 1369/4567 cut-off events. For 34124/34986 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 37286 event pairs, 377 based on Foata normal form. 164/4189 useless extension candidates. Maximal degree in co-relation 12347. Up to 1325 conditions per place. [2022-11-18 20:21:01,677 INFO L137 encePairwiseOnDemand]: 115/144 looper letters, 99 selfloop transitions, 67 changer transitions 0/225 dead transitions. [2022-11-18 20:21:01,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 225 transitions, 1863 flow [2022-11-18 20:21:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:21:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-18 20:21:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2926 transitions. [2022-11-18 20:21:01,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2022-11-18 20:21:01,688 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2926 transitions. [2022-11-18 20:21:01,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2926 transitions. [2022-11-18 20:21:01,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:01,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2926 transitions. [2022-11-18 20:21:01,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 77.0) internal successors, (2926), 38 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:01,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 144.0) internal successors, (5616), 39 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:01,709 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 144.0) internal successors, (5616), 39 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:01,709 INFO L175 Difference]: Start difference. First operand has 190 places, 135 transitions, 648 flow. Second operand 38 states and 2926 transitions. [2022-11-18 20:21:01,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 225 transitions, 1863 flow [2022-11-18 20:21:01,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 225 transitions, 1693 flow, removed 66 selfloop flow, removed 18 redundant places. [2022-11-18 20:21:01,773 INFO L231 Difference]: Finished difference. Result has 205 places, 174 transitions, 1281 flow [2022-11-18 20:21:01,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1281, PETRI_PLACES=205, PETRI_TRANSITIONS=174} [2022-11-18 20:21:01,774 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 85 predicate places. [2022-11-18 20:21:01,774 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 174 transitions, 1281 flow [2022-11-18 20:21:01,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 75.88888888888889) internal successors, (3415), 45 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:01,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:01,776 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:01,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:01,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:21:01,982 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:21:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2052701280, now seen corresponding path program 1 times [2022-11-18 20:21:01,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:01,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396217259] [2022-11-18 20:21:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:01,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:21:02,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:02,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396217259] [2022-11-18 20:21:02,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396217259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:02,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415509325] [2022-11-18 20:21:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:02,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:02,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:02,752 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:02,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:21:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:21:02,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:03,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:04,309 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-18 20:21:04,310 INFO L350 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 52 treesize of output 56 [2022-11-18 20:21:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:05,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415509325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:05,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:05,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 14] total 33 [2022-11-18 20:21:05,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281779021] [2022-11-18 20:21:05,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:05,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 20:21:05,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:05,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 20:21:05,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:21:05,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 144 [2022-11-18 20:21:05,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 174 transitions, 1281 flow. Second operand has 34 states, 34 states have (on average 90.41176470588235) internal successors, (3074), 34 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:05,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:05,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 144 [2022-11-18 20:21:05,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:09,761 INFO L130 PetriNetUnfolder]: 3069/10291 cut-off events. [2022-11-18 20:21:09,761 INFO L131 PetriNetUnfolder]: For 149952/152414 co-relation queries the response was YES. [2022-11-18 20:21:09,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47609 conditions, 10291 events. 3069/10291 cut-off events. For 149952/152414 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 102255 event pairs, 610 based on Foata normal form. 808/10328 useless extension candidates. Maximal degree in co-relation 38171. Up to 3109 conditions per place. [2022-11-18 20:21:09,879 INFO L137 encePairwiseOnDemand]: 127/144 looper letters, 175 selfloop transitions, 122 changer transitions 0/369 dead transitions. [2022-11-18 20:21:09,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 369 transitions, 4102 flow [2022-11-18 20:21:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 20:21:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 20:21:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4133 transitions. [2022-11-18 20:21:09,886 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6378086419753086 [2022-11-18 20:21:09,886 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4133 transitions. [2022-11-18 20:21:09,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4133 transitions. [2022-11-18 20:21:09,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:09,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4133 transitions. [2022-11-18 20:21:09,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 91.84444444444445) internal successors, (4133), 45 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:09,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 144.0) internal successors, (6624), 46 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:10,002 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 144.0) internal successors, (6624), 46 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:10,003 INFO L175 Difference]: Start difference. First operand has 205 places, 174 transitions, 1281 flow. Second operand 45 states and 4133 transitions. [2022-11-18 20:21:10,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 369 transitions, 4102 flow [2022-11-18 20:21:10,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 369 transitions, 3797 flow, removed 125 selfloop flow, removed 17 redundant places. [2022-11-18 20:21:10,274 INFO L231 Difference]: Finished difference. Result has 246 places, 258 transitions, 2852 flow [2022-11-18 20:21:10,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2852, PETRI_PLACES=246, PETRI_TRANSITIONS=258} [2022-11-18 20:21:10,275 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 126 predicate places. [2022-11-18 20:21:10,276 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 258 transitions, 2852 flow [2022-11-18 20:21:10,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.41176470588235) internal successors, (3074), 34 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:10,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:10,277 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:10,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:10,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:21:10,484 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:21:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1105258056, now seen corresponding path program 2 times [2022-11-18 20:21:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:10,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915757977] [2022-11-18 20:21:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:10,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:15,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:15,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915757977] [2022-11-18 20:21:15,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915757977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:15,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781026431] [2022-11-18 20:21:15,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:21:15,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:15,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:15,662 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:15,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:21:15,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:21:15,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:15,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 20:21:15,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:21:16,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:17,200 INFO L321 Elim1Store]: treesize reduction 29, result has 60.3 percent of original size [2022-11-18 20:21:17,200 INFO L350 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 50 treesize of output 61 [2022-11-18 20:21:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:21:18,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781026431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:18,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:18,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7, 6] total 40 [2022-11-18 20:21:18,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393552683] [2022-11-18 20:21:18,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:18,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:21:18,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:18,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:21:18,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:21:18,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-11-18 20:21:18,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 258 transitions, 2852 flow. Second operand has 41 states, 41 states have (on average 70.97560975609755) internal successors, (2910), 41 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:18,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:18,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-11-18 20:21:18,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:31,278 INFO L130 PetriNetUnfolder]: 6501/17844 cut-off events. [2022-11-18 20:21:31,278 INFO L131 PetriNetUnfolder]: For 333012/333667 co-relation queries the response was YES. [2022-11-18 20:21:31,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94018 conditions, 17844 events. 6501/17844 cut-off events. For 333012/333667 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 180095 event pairs, 498 based on Foata normal form. 387/17216 useless extension candidates. Maximal degree in co-relation 89117. Up to 4866 conditions per place. [2022-11-18 20:21:31,577 INFO L137 encePairwiseOnDemand]: 113/144 looper letters, 293 selfloop transitions, 162 changer transitions 5/513 dead transitions. [2022-11-18 20:21:31,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 513 transitions, 6657 flow [2022-11-18 20:21:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-18 20:21:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-18 20:21:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3777 transitions. [2022-11-18 20:21:31,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5044070512820513 [2022-11-18 20:21:31,596 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3777 transitions. [2022-11-18 20:21:31,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3777 transitions. [2022-11-18 20:21:31,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:31,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3777 transitions. [2022-11-18 20:21:31,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 72.63461538461539) internal successors, (3777), 52 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:31,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 144.0) internal successors, (7632), 53 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:31,629 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 144.0) internal successors, (7632), 53 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:31,630 INFO L175 Difference]: Start difference. First operand has 246 places, 258 transitions, 2852 flow. Second operand 52 states and 3777 transitions. [2022-11-18 20:21:31,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 513 transitions, 6657 flow [2022-11-18 20:21:33,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 513 transitions, 5611 flow, removed 325 selfloop flow, removed 21 redundant places. [2022-11-18 20:21:33,329 INFO L231 Difference]: Finished difference. Result has 298 places, 352 transitions, 4227 flow [2022-11-18 20:21:33,329 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=4227, PETRI_PLACES=298, PETRI_TRANSITIONS=352} [2022-11-18 20:21:33,330 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 178 predicate places. [2022-11-18 20:21:33,330 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 352 transitions, 4227 flow [2022-11-18 20:21:33,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 70.97560975609755) internal successors, (2910), 41 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:33,331 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:33,332 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:33,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:33,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:21:33,540 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:21:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:33,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1105258057, now seen corresponding path program 3 times [2022-11-18 20:21:33,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:33,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561804231] [2022-11-18 20:21:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:33,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:21:33,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:33,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561804231] [2022-11-18 20:21:33,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561804231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:33,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181329483] [2022-11-18 20:21:33,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:21:33,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:33,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:33,896 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:33,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:21:34,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:21:34,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:34,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:21:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:21:34,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:34,649 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:21:34,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2022-11-18 20:21:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:21:34,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181329483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:34,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:34,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-18 20:21:34,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700809459] [2022-11-18 20:21:34,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:34,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:21:34,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:21:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:21:34,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 144 [2022-11-18 20:21:34,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 352 transitions, 4227 flow. Second operand has 14 states, 14 states have (on average 108.28571428571429) internal successors, (1516), 14 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:34,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:34,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 144 [2022-11-18 20:21:34,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:41,824 INFO L130 PetriNetUnfolder]: 5067/17558 cut-off events. [2022-11-18 20:21:41,825 INFO L131 PetriNetUnfolder]: For 479300/485560 co-relation queries the response was YES. [2022-11-18 20:21:42,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108584 conditions, 17558 events. 5067/17558 cut-off events. For 479300/485560 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 192527 event pairs, 1184 based on Foata normal form. 1333/17375 useless extension candidates. Maximal degree in co-relation 101775. Up to 5345 conditions per place. [2022-11-18 20:21:42,241 INFO L137 encePairwiseOnDemand]: 134/144 looper letters, 210 selfloop transitions, 153 changer transitions 0/474 dead transitions. [2022-11-18 20:21:42,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 474 transitions, 7455 flow [2022-11-18 20:21:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:21:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:21:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1977 transitions. [2022-11-18 20:21:42,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7627314814814815 [2022-11-18 20:21:42,247 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1977 transitions. [2022-11-18 20:21:42,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1977 transitions. [2022-11-18 20:21:42,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:42,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1977 transitions. [2022-11-18 20:21:42,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 109.83333333333333) internal successors, (1977), 18 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:42,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 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) [2022-11-18 20:21:42,257 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 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) [2022-11-18 20:21:42,257 INFO L175 Difference]: Start difference. First operand has 298 places, 352 transitions, 4227 flow. Second operand 18 states and 1977 transitions. [2022-11-18 20:21:42,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 474 transitions, 7455 flow [2022-11-18 20:21:44,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 474 transitions, 7092 flow, removed 155 selfloop flow, removed 24 redundant places. [2022-11-18 20:21:44,433 INFO L231 Difference]: Finished difference. Result has 300 places, 452 transitions, 6688 flow [2022-11-18 20:21:44,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6688, PETRI_PLACES=300, PETRI_TRANSITIONS=452} [2022-11-18 20:21:44,434 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 180 predicate places. [2022-11-18 20:21:44,434 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 452 transitions, 6688 flow [2022-11-18 20:21:44,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.28571428571429) internal successors, (1516), 14 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:44,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:44,435 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:44,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:44,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:44,636 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:21:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1524186091, now seen corresponding path program 1 times [2022-11-18 20:21:44,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:44,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59086994] [2022-11-18 20:21:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:44,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:21:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:44,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59086994] [2022-11-18 20:21:44,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59086994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:44,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586455441] [2022-11-18 20:21:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:44,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:44,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:45,019 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:45,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:21:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:45,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 20:21:45,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:45,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:46,117 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-18 20:21:46,117 INFO L350 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 [2022-11-18 20:21:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:46,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586455441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:46,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:46,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 28 [2022-11-18 20:21:46,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359452526] [2022-11-18 20:21:46,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:46,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:21:46,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:21:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:21:46,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 144 [2022-11-18 20:21:46,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 452 transitions, 6688 flow. Second operand has 29 states, 29 states have (on average 90.65517241379311) internal successors, (2629), 29 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:46,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:46,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 144 [2022-11-18 20:21:46,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:55,112 INFO L130 PetriNetUnfolder]: 5419/19927 cut-off events. [2022-11-18 20:21:55,113 INFO L131 PetriNetUnfolder]: For 614988/622796 co-relation queries the response was YES. [2022-11-18 20:21:55,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127885 conditions, 19927 events. 5419/19927 cut-off events. For 614988/622796 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 226166 event pairs, 1184 based on Foata normal form. 2299/20762 useless extension candidates. Maximal degree in co-relation 116704. Up to 5810 conditions per place. [2022-11-18 20:21:55,567 INFO L137 encePairwiseOnDemand]: 124/144 looper letters, 286 selfloop transitions, 239 changer transitions 0/601 dead transitions. [2022-11-18 20:21:55,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 601 transitions, 10842 flow [2022-11-18 20:21:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:21:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-18 20:21:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2955 transitions. [2022-11-18 20:21:55,572 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6412760416666666 [2022-11-18 20:21:55,572 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2955 transitions. [2022-11-18 20:21:55,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2955 transitions. [2022-11-18 20:21:55,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:55,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2955 transitions. [2022-11-18 20:21:55,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 92.34375) internal successors, (2955), 32 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:55,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 144.0) internal successors, (4752), 33 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:55,585 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 144.0) internal successors, (4752), 33 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:55,585 INFO L175 Difference]: Start difference. First operand has 300 places, 452 transitions, 6688 flow. Second operand 32 states and 2955 transitions. [2022-11-18 20:21:55,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 601 transitions, 10842 flow [2022-11-18 20:21:59,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 601 transitions, 8778 flow, removed 1012 selfloop flow, removed 1 redundant places. [2022-11-18 20:21:59,531 INFO L231 Difference]: Finished difference. Result has 335 places, 502 transitions, 7243 flow [2022-11-18 20:21:59,531 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=5298, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7243, PETRI_PLACES=335, PETRI_TRANSITIONS=502} [2022-11-18 20:21:59,532 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 215 predicate places. [2022-11-18 20:21:59,532 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 502 transitions, 7243 flow [2022-11-18 20:21:59,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.65517241379311) internal successors, (2629), 29 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:59,532 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:59,532 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:59,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:59,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:59,733 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:21:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash -621246171, now seen corresponding path program 2 times [2022-11-18 20:21:59,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:59,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022420463] [2022-11-18 20:21:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:59,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:01,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:22:01,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022420463] [2022-11-18 20:22:01,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022420463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:01,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050898676] [2022-11-18 20:22:01,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:22:01,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:01,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:22:01,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:22:01,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:22:01,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:22:01,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:22:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:22:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:22:02,071 INFO L350 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 11 [2022-11-18 20:22:02,524 INFO L350 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 6 treesize of output 5 [2022-11-18 20:22:02,615 INFO L350 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 6 treesize of output 5 [2022-11-18 20:22:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:03,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:22:05,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:22:05,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-11-18 20:22:05,278 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-18 20:22:05,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 266 treesize of output 270 [2022-11-18 20:22:05,323 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-18 20:22:05,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 218 [2022-11-18 20:22:05,375 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-18 20:22:05,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 165 [2022-11-18 20:22:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:07,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050898676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:22:07,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:22:07,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 20] total 59 [2022-11-18 20:22:07,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879071962] [2022-11-18 20:22:07,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:22:07,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-18 20:22:07,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:22:07,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-18 20:22:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=2950, Unknown=30, NotChecked=0, Total=3540 [2022-11-18 20:22:07,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 144 [2022-11-18 20:22:07,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 502 transitions, 7243 flow. Second operand has 60 states, 60 states have (on average 75.56666666666666) internal successors, (4534), 60 states have internal predecessors, (4534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:07,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:22:07,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 144 [2022-11-18 20:22:07,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:22:23,477 INFO L130 PetriNetUnfolder]: 5651/24316 cut-off events. [2022-11-18 20:22:23,477 INFO L131 PetriNetUnfolder]: For 653840/658632 co-relation queries the response was YES. [2022-11-18 20:22:23,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131495 conditions, 24316 events. 5651/24316 cut-off events. For 653840/658632 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 299161 event pairs, 1188 based on Foata normal form. 2939/25735 useless extension candidates. Maximal degree in co-relation 123969. Up to 5989 conditions per place. [2022-11-18 20:22:24,048 INFO L137 encePairwiseOnDemand]: 118/144 looper letters, 337 selfloop transitions, 308 changer transitions 0/708 dead transitions. [2022-11-18 20:22:24,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 708 transitions, 11961 flow [2022-11-18 20:22:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 20:22:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-18 20:22:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3853 transitions. [2022-11-18 20:22:24,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5351388888888889 [2022-11-18 20:22:24,053 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3853 transitions. [2022-11-18 20:22:24,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3853 transitions. [2022-11-18 20:22:24,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:22:24,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3853 transitions. [2022-11-18 20:22:24,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 77.06) internal successors, (3853), 50 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:24,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 144.0) internal successors, (7344), 51 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:24,071 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 144.0) internal successors, (7344), 51 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:24,072 INFO L175 Difference]: Start difference. First operand has 335 places, 502 transitions, 7243 flow. Second operand 50 states and 3853 transitions. [2022-11-18 20:22:24,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 708 transitions, 11961 flow [2022-11-18 20:22:27,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 708 transitions, 11353 flow, removed 236 selfloop flow, removed 21 redundant places. [2022-11-18 20:22:27,641 INFO L231 Difference]: Finished difference. Result has 378 places, 554 transitions, 8941 flow [2022-11-18 20:22:27,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=8941, PETRI_PLACES=378, PETRI_TRANSITIONS=554} [2022-11-18 20:22:27,642 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 258 predicate places. [2022-11-18 20:22:27,642 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 554 transitions, 8941 flow [2022-11-18 20:22:27,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 75.56666666666666) internal successors, (4534), 60 states have internal predecessors, (4534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:27,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:22:27,643 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:22:27,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:22:27,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:27,856 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:22:27,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:22:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash 348087166, now seen corresponding path program 1 times [2022-11-18 20:22:27,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:22:27,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617792953] [2022-11-18 20:22:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:22:27,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:22:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:29,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:22:29,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617792953] [2022-11-18 20:22:29,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617792953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:29,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463254860] [2022-11-18 20:22:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:22:29,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:29,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:22:29,768 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:22:29,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:22:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:29,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 20:22:29,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:22:30,688 INFO L350 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 11 [2022-11-18 20:22:31,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:31,498 INFO L350 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 22 [2022-11-18 20:22:31,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:31,676 INFO L350 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 22 [2022-11-18 20:22:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:32,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:22:33,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:22:33,761 INFO L350 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 91 treesize of output 67 [2022-11-18 20:22:33,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:22:33,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 410 [2022-11-18 20:22:33,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:22:33,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 241 treesize of output 229 [2022-11-18 20:22:33,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:22:33,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 254 [2022-11-18 20:22:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:39,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463254860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:22:39,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:22:39,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 68 [2022-11-18 20:22:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120370346] [2022-11-18 20:22:39,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:22:39,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 20:22:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:22:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 20:22:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=4286, Unknown=8, NotChecked=0, Total=4692 [2022-11-18 20:22:39,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-11-18 20:22:39,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 554 transitions, 8941 flow. Second operand has 69 states, 69 states have (on average 69.66666666666667) internal successors, (4807), 69 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:39,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:22:39,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-11-18 20:22:39,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:22:57,663 INFO L130 PetriNetUnfolder]: 10439/35249 cut-off events. [2022-11-18 20:22:57,663 INFO L131 PetriNetUnfolder]: For 849888/852654 co-relation queries the response was YES. [2022-11-18 20:22:58,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206040 conditions, 35249 events. 10439/35249 cut-off events. For 849888/852654 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 429176 event pairs, 2056 based on Foata normal form. 255/33458 useless extension candidates. Maximal degree in co-relation 199924. Up to 17368 conditions per place. [2022-11-18 20:22:58,411 INFO L137 encePairwiseOnDemand]: 107/144 looper letters, 510 selfloop transitions, 164 changer transitions 7/734 dead transitions. [2022-11-18 20:22:58,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 734 transitions, 13046 flow [2022-11-18 20:22:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 20:22:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-18 20:22:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3095 transitions. [2022-11-18 20:22:58,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48847853535353536 [2022-11-18 20:22:58,416 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3095 transitions. [2022-11-18 20:22:58,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3095 transitions. [2022-11-18 20:22:58,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:22:58,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3095 transitions. [2022-11-18 20:22:58,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 70.3409090909091) internal successors, (3095), 44 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:58,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 144.0) internal successors, (6480), 45 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:58,430 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 144.0) internal successors, (6480), 45 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:58,430 INFO L175 Difference]: Start difference. First operand has 378 places, 554 transitions, 8941 flow. Second operand 44 states and 3095 transitions. [2022-11-18 20:22:58,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 734 transitions, 13046 flow [2022-11-18 20:23:04,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 734 transitions, 12507 flow, removed 229 selfloop flow, removed 28 redundant places. [2022-11-18 20:23:04,203 INFO L231 Difference]: Finished difference. Result has 411 places, 669 transitions, 11102 flow [2022-11-18 20:23:04,204 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=8526, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=11102, PETRI_PLACES=411, PETRI_TRANSITIONS=669} [2022-11-18 20:23:04,204 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 291 predicate places. [2022-11-18 20:23:04,204 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 669 transitions, 11102 flow [2022-11-18 20:23:04,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 69.66666666666667) internal successors, (4807), 69 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:04,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:04,206 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:04,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:23:04,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 20:23:04,411 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-18 20:23:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:04,412 INFO L85 PathProgramCache]: Analyzing trace with hash 459049991, now seen corresponding path program 2 times [2022-11-18 20:23:04,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:04,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958740991] [2022-11-18 20:23:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:04,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:06,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958740991] [2022-11-18 20:23:06,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958740991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:23:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261564159] [2022-11-18 20:23:06,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:23:06,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:23:06,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:23:06,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:23:06,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8880cd4b-071e-4d15-ae7f-f6ca53189d66/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:23:06,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:23:06,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:23:06,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-18 20:23:06,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:23:07,540 INFO L350 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 11 [2022-11-18 20:23:08,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:08,297 INFO L350 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 22 [2022-11-18 20:23:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:08,458 INFO L350 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 22 [2022-11-18 20:23:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:09,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:23:10,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:23:10,754 INFO L350 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 91 treesize of output 67 [2022-11-18 20:23:10,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:23:10,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 410 [2022-11-18 20:23:10,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:23:10,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 342 treesize of output 292 [2022-11-18 20:23:10,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:23:10,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 266 treesize of output 254 [2022-11-18 20:23:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:16,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261564159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:23:16,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:23:16,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 68 [2022-11-18 20:23:16,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729889200] [2022-11-18 20:23:16,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:23:16,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 20:23:16,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:16,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 20:23:16,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=4306, Unknown=11, NotChecked=0, Total=4692 [2022-11-18 20:23:16,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-11-18 20:23:16,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 669 transitions, 11102 flow. Second operand has 69 states, 69 states have (on average 69.71014492753623) internal successors, (4810), 69 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:16,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:16,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-11-18 20:23:16,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand