./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b 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_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- 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-6b4ec56 [2022-11-20 11:01:45,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:01:45,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:01:45,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:01:45,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:01:45,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:01:45,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:01:45,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:01:45,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:01:45,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:01:45,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:01:45,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:01:45,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:01:45,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:01:45,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:01:45,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:01:45,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:01:45,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:01:45,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:01:45,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:01:45,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:01:45,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:01:45,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:01:45,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:01:45,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:01:45,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:01:45,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:01:45,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:01:45,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:01:45,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:01:45,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:01:45,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:01:45,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:01:45,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:01:45,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:01:45,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:01:45,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:01:45,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:01:45,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:01:45,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:01:45,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:01:45,661 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 11:01:45,698 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:01:45,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:01:45,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:01:45,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:01:45,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:01:45,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:01:45,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:01:45,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:01:45,712 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:01:45,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:01:45,713 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:01:45,714 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:01:45,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:01:45,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:01:45,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:01:45,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:01:45,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:01:45,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:01:45,715 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 11:01:45,715 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:01:45,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:01:45,716 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:01:45,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:01:45,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:01:45,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:01:45,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:01:45,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:01:45,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:01:45,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:01:45,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:01:45,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:01:45,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:01:45,720 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:01:45,720 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:01:45,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:01:45,721 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_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-11-20 11:01:46,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:01:46,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:01:46,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:01:46,151 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:01:46,152 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:01:46,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-20 11:01:49,867 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:01:50,236 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:01:50,237 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-20 11:01:50,252 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/data/b0048edd6/9d41809cc28e45f6b68bc7f56b98999c/FLAG5b85eea2f [2022-11-20 11:01:50,276 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/data/b0048edd6/9d41809cc28e45f6b68bc7f56b98999c [2022-11-20 11:01:50,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:01:50,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:01:50,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:01:50,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:01:50,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:01:50,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f505027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50, skipping insertion in model container [2022-11-20 11:01:50,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:01:50,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:01:50,525 WARN L237 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_9b425560-1348-46bf-8b93-268820b465b3/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-20 11:01:50,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:01:50,549 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:01:50,575 WARN L237 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_9b425560-1348-46bf-8b93-268820b465b3/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-20 11:01:50,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:01:50,599 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:01:50,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50 WrapperNode [2022-11-20 11:01:50,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:01:50,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:01:50,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:01:50,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:01:50,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,646 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 172 [2022-11-20 11:01:50,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:01:50,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:01:50,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:01:50,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:01:50,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,680 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:01:50,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:01:50,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:01:50,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:01:50,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (1/1) ... [2022-11-20 11:01:50,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:01:50,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:50,744 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:01:50,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:01:50,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:01:50,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:01:50,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:01:50,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:01:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:01:50,808 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:01:50,809 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:01:50,809 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:01:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:01:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:01:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:01:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:01:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:01:50,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:01:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:01:50,813 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:01:50,940 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:01:50,943 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:01:51,407 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:01:52,047 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:01:52,047 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:01:52,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:01:52 BoogieIcfgContainer [2022-11-20 11:01:52,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:01:52,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:01:52,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:01:52,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:01:52,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:01:50" (1/3) ... [2022-11-20 11:01:52,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8163e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:01:52, skipping insertion in model container [2022-11-20 11:01:52,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:01:50" (2/3) ... [2022-11-20 11:01:52,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8163e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:01:52, skipping insertion in model container [2022-11-20 11:01:52,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:01:52" (3/3) ... [2022-11-20 11:01:52,069 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-11-20 11:01:52,080 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:01:52,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:01:52,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-20 11:01:52,095 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:01:52,294 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:01:52,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 140 transitions, 296 flow [2022-11-20 11:01:52,476 INFO L130 PetriNetUnfolder]: 9/138 cut-off events. [2022-11-20 11:01:52,477 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:01:52,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 9/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 166 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2022-11-20 11:01:52,485 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 140 transitions, 296 flow [2022-11-20 11:01:52,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 119 transitions, 247 flow [2022-11-20 11:01:52,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:01:52,514 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;@2f81d438, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:01:52,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-11-20 11:01:52,548 INFO L130 PetriNetUnfolder]: 3/57 cut-off events. [2022-11-20 11:01:52,548 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:01:52,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:01:52,550 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] [2022-11-20 11:01:52,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:01:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash -857656626, now seen corresponding path program 1 times [2022-11-20 11:01:52,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:52,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335614687] [2022-11-20 11:01:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:52,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:53,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:53,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335614687] [2022-11-20 11:01:53,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335614687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:53,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:01:53,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:01:53,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983762408] [2022-11-20 11:01:53,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:53,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:01:53,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:01:53,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:01:53,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 140 [2022-11-20 11:01:53,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 119 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:53,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:01:53,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 140 [2022-11-20 11:01:53,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:01:53,705 INFO L130 PetriNetUnfolder]: 157/551 cut-off events. [2022-11-20 11:01:53,705 INFO L131 PetriNetUnfolder]: For 96/106 co-relation queries the response was YES. [2022-11-20 11:01:53,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 551 events. 157/551 cut-off events. For 96/106 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2778 event pairs, 70 based on Foata normal form. 44/357 useless extension candidates. Maximal degree in co-relation 335. Up to 137 conditions per place. [2022-11-20 11:01:53,714 INFO L137 encePairwiseOnDemand]: 125/140 looper letters, 42 selfloop transitions, 4 changer transitions 2/131 dead transitions. [2022-11-20 11:01:53,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 131 transitions, 372 flow [2022-11-20 11:01:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:01:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:01:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2022-11-20 11:01:53,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8271428571428572 [2022-11-20 11:01:53,748 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2022-11-20 11:01:53,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2022-11-20 11:01:53,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:01:53,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2022-11-20 11:01:53,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:53,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:53,775 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:53,778 INFO L175 Difference]: Start difference. First operand has 118 places, 119 transitions, 247 flow. Second operand 5 states and 579 transitions. [2022-11-20 11:01:53,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 131 transitions, 372 flow [2022-11-20 11:01:53,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 131 transitions, 362 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 11:01:53,791 INFO L231 Difference]: Finished difference. Result has 118 places, 111 transitions, 250 flow [2022-11-20 11:01:53,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=118, PETRI_TRANSITIONS=111} [2022-11-20 11:01:53,801 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 0 predicate places. [2022-11-20 11:01:53,802 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 111 transitions, 250 flow [2022-11-20 11:01:53,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:53,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:01:53,804 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] [2022-11-20 11:01:53,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:01:53,805 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:01:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1570965866, now seen corresponding path program 1 times [2022-11-20 11:01:53,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:53,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096998158] [2022-11-20 11:01:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:53,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:54,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:54,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096998158] [2022-11-20 11:01:54,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096998158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:54,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:01:54,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:01:54,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502436974] [2022-11-20 11:01:54,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:54,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:01:54,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:54,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:01:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:01:54,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 140 [2022-11-20 11:01:54,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 111 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:54,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:01:54,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 140 [2022-11-20 11:01:54,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:01:54,680 INFO L130 PetriNetUnfolder]: 144/545 cut-off events. [2022-11-20 11:01:54,680 INFO L131 PetriNetUnfolder]: For 27/32 co-relation queries the response was YES. [2022-11-20 11:01:54,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 545 events. 144/545 cut-off events. For 27/32 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2818 event pairs, 102 based on Foata normal form. 0/339 useless extension candidates. Maximal degree in co-relation 614. Up to 226 conditions per place. [2022-11-20 11:01:54,693 INFO L137 encePairwiseOnDemand]: 131/140 looper letters, 49 selfloop transitions, 8 changer transitions 2/134 dead transitions. [2022-11-20 11:01:54,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 134 transitions, 420 flow [2022-11-20 11:01:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:01:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:01:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 812 transitions. [2022-11-20 11:01:54,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.725 [2022-11-20 11:01:54,699 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 812 transitions. [2022-11-20 11:01:54,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 812 transitions. [2022-11-20 11:01:54,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:01:54,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 812 transitions. [2022-11-20 11:01:54,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.5) internal successors, (812), 8 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:54,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 140.0) internal successors, (1260), 9 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:54,709 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 140.0) internal successors, (1260), 9 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:54,709 INFO L175 Difference]: Start difference. First operand has 118 places, 111 transitions, 250 flow. Second operand 8 states and 812 transitions. [2022-11-20 11:01:54,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 134 transitions, 420 flow [2022-11-20 11:01:54,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 134 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:01:54,718 INFO L231 Difference]: Finished difference. Result has 125 places, 113 transitions, 280 flow [2022-11-20 11:01:54,719 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=280, PETRI_PLACES=125, PETRI_TRANSITIONS=113} [2022-11-20 11:01:54,720 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 7 predicate places. [2022-11-20 11:01:54,720 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 113 transitions, 280 flow [2022-11-20 11:01:54,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:54,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:01:54,722 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] [2022-11-20 11:01:54,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:01:54,723 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:01:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1992461929, now seen corresponding path program 1 times [2022-11-20 11:01:54,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:54,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771275203] [2022-11-20 11:01:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:54,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:54,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:54,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771275203] [2022-11-20 11:01:54,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771275203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:54,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022716837] [2022-11-20 11:01:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:54,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:54,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:54,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:54,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:01:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:55,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:01:55,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:55,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:01:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:55,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022716837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:01:55,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:01:55,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 11:01:55,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831267329] [2022-11-20 11:01:55,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:01:55,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:01:55,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:01:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:01:55,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 140 [2022-11-20 11:01:55,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 113 transitions, 280 flow. Second operand has 12 states, 12 states have (on average 105.66666666666667) internal successors, (1268), 12 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:55,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:01:55,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 140 [2022-11-20 11:01:55,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:01:56,052 INFO L130 PetriNetUnfolder]: 324/1135 cut-off events. [2022-11-20 11:01:56,052 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-20 11:01:56,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 1135 events. 324/1135 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6525 event pairs, 145 based on Foata normal form. 3/684 useless extension candidates. Maximal degree in co-relation 1655. Up to 132 conditions per place. [2022-11-20 11:01:56,063 INFO L137 encePairwiseOnDemand]: 133/140 looper letters, 88 selfloop transitions, 18 changer transitions 0/190 dead transitions. [2022-11-20 11:01:56,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 190 transitions, 690 flow [2022-11-20 11:01:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:01:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:01:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1963 transitions. [2022-11-20 11:01:56,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.778968253968254 [2022-11-20 11:01:56,070 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1963 transitions. [2022-11-20 11:01:56,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1963 transitions. [2022-11-20 11:01:56,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:01:56,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1963 transitions. [2022-11-20 11:01:56,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 109.05555555555556) internal successors, (1963), 18 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:56,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:56,087 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:56,087 INFO L175 Difference]: Start difference. First operand has 125 places, 113 transitions, 280 flow. Second operand 18 states and 1963 transitions. [2022-11-20 11:01:56,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 190 transitions, 690 flow [2022-11-20 11:01:56,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 190 transitions, 680 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:01:56,094 INFO L231 Difference]: Finished difference. Result has 142 places, 125 transitions, 376 flow [2022-11-20 11:01:56,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=376, PETRI_PLACES=142, PETRI_TRANSITIONS=125} [2022-11-20 11:01:56,096 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 24 predicate places. [2022-11-20 11:01:56,096 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 125 transitions, 376 flow [2022-11-20 11:01:56,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 105.66666666666667) internal successors, (1268), 12 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:56,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:01:56,098 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] [2022-11-20 11:01:56,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:56,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:56,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:01:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1636778114, now seen corresponding path program 1 times [2022-11-20 11:01:56,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:56,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41425525] [2022-11-20 11:01:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:56,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:56,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:56,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41425525] [2022-11-20 11:01:56,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41425525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:56,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629727314] [2022-11-20 11:01:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:56,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:56,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:56,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:56,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:01:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:56,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:01:56,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:56,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:56,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629727314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:56,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:01:56,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 11:01:56,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929055539] [2022-11-20 11:01:56,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:56,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:01:56,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:01:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:01:56,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 140 [2022-11-20 11:01:56,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 125 transitions, 376 flow. Second operand has 6 states, 6 states have (on average 105.33333333333333) internal successors, (632), 6 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:56,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:01:56,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 140 [2022-11-20 11:01:56,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:01:57,129 INFO L130 PetriNetUnfolder]: 324/1131 cut-off events. [2022-11-20 11:01:57,129 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-11-20 11:01:57,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 1131 events. 324/1131 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6507 event pairs, 145 based on Foata normal form. 4/681 useless extension candidates. Maximal degree in co-relation 1400. Up to 512 conditions per place. [2022-11-20 11:01:57,141 INFO L137 encePairwiseOnDemand]: 135/140 looper letters, 38 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2022-11-20 11:01:57,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 133 transitions, 477 flow [2022-11-20 11:01:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:01:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:01:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 762 transitions. [2022-11-20 11:01:57,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7775510204081633 [2022-11-20 11:01:57,144 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 762 transitions. [2022-11-20 11:01:57,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 762 transitions. [2022-11-20 11:01:57,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:01:57,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 762 transitions. [2022-11-20 11:01:57,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.85714285714286) internal successors, (762), 7 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:57,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:57,151 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:57,151 INFO L175 Difference]: Start difference. First operand has 142 places, 125 transitions, 376 flow. Second operand 7 states and 762 transitions. [2022-11-20 11:01:57,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 133 transitions, 477 flow [2022-11-20 11:01:57,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 133 transitions, 445 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 11:01:57,158 INFO L231 Difference]: Finished difference. Result has 138 places, 121 transitions, 339 flow [2022-11-20 11:01:57,158 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=138, PETRI_TRANSITIONS=121} [2022-11-20 11:01:57,159 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 20 predicate places. [2022-11-20 11:01:57,160 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 121 transitions, 339 flow [2022-11-20 11:01:57,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.33333333333333) internal successors, (632), 6 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:57,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:01:57,161 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] [2022-11-20 11:01:57,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:57,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:57,368 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:01:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:57,369 INFO L85 PathProgramCache]: Analyzing trace with hash -703405267, now seen corresponding path program 1 times [2022-11-20 11:01:57,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:57,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015215898] [2022-11-20 11:01:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:57,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:57,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:57,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015215898] [2022-11-20 11:01:57,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015215898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:57,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:01:57,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:01:57,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006037355] [2022-11-20 11:01:57,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:57,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:01:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:57,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:01:57,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:01:57,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 140 [2022-11-20 11:01:57,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 121 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 96.14285714285714) internal successors, (673), 7 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:57,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:01:57,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 140 [2022-11-20 11:01:57,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:01:58,238 INFO L130 PetriNetUnfolder]: 482/1402 cut-off events. [2022-11-20 11:01:58,239 INFO L131 PetriNetUnfolder]: For 194/197 co-relation queries the response was YES. [2022-11-20 11:01:58,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 1402 events. 482/1402 cut-off events. For 194/197 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8349 event pairs, 350 based on Foata normal form. 3/840 useless extension candidates. Maximal degree in co-relation 2384. Up to 889 conditions per place. [2022-11-20 11:01:58,251 INFO L137 encePairwiseOnDemand]: 131/140 looper letters, 38 selfloop transitions, 6 changer transitions 10/131 dead transitions. [2022-11-20 11:01:58,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 131 transitions, 470 flow [2022-11-20 11:01:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:01:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:01:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 800 transitions. [2022-11-20 11:01:58,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-11-20 11:01:58,255 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 800 transitions. [2022-11-20 11:01:58,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 800 transitions. [2022-11-20 11:01:58,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:01:58,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 800 transitions. [2022-11-20 11:01:58,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:58,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 140.0) internal successors, (1260), 9 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:58,262 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 140.0) internal successors, (1260), 9 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:58,263 INFO L175 Difference]: Start difference. First operand has 138 places, 121 transitions, 339 flow. Second operand 8 states and 800 transitions. [2022-11-20 11:01:58,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 131 transitions, 470 flow [2022-11-20 11:01:58,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 131 transitions, 456 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:01:58,270 INFO L231 Difference]: Finished difference. Result has 142 places, 119 transitions, 329 flow [2022-11-20 11:01:58,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=142, PETRI_TRANSITIONS=119} [2022-11-20 11:01:58,275 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 24 predicate places. [2022-11-20 11:01:58,276 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 119 transitions, 329 flow [2022-11-20 11:01:58,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.14285714285714) internal successors, (673), 7 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:58,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:01:58,277 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] [2022-11-20 11:01:58,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:01:58,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:01:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash -185894540, now seen corresponding path program 1 times [2022-11-20 11:01:58,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:58,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439741598] [2022-11-20 11:01:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:58,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:01:58,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:58,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439741598] [2022-11-20 11:01:58,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439741598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:58,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:01:58,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:01:58,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137471391] [2022-11-20 11:01:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:58,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:01:58,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:01:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:01:58,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 140 [2022-11-20 11:01:58,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 119 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:58,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:01:58,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 140 [2022-11-20 11:01:58,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:01:59,161 INFO L130 PetriNetUnfolder]: 397/1214 cut-off events. [2022-11-20 11:01:59,162 INFO L131 PetriNetUnfolder]: For 79/87 co-relation queries the response was YES. [2022-11-20 11:01:59,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 1214 events. 397/1214 cut-off events. For 79/87 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7938 event pairs, 128 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 1961. Up to 537 conditions per place. [2022-11-20 11:01:59,173 INFO L137 encePairwiseOnDemand]: 133/140 looper letters, 19 selfloop transitions, 3 changer transitions 0/127 dead transitions. [2022-11-20 11:01:59,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 127 transitions, 392 flow [2022-11-20 11:01:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:01:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:01:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2022-11-20 11:01:59,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8690476190476191 [2022-11-20 11:01:59,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2022-11-20 11:01:59,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2022-11-20 11:01:59,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:01:59,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2022-11-20 11:01:59,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:59,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:59,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:59,186 INFO L175 Difference]: Start difference. First operand has 142 places, 119 transitions, 329 flow. Second operand 3 states and 365 transitions. [2022-11-20 11:01:59,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 127 transitions, 392 flow [2022-11-20 11:01:59,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 127 transitions, 370 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-20 11:01:59,199 INFO L231 Difference]: Finished difference. Result has 131 places, 121 transitions, 332 flow [2022-11-20 11:01:59,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=332, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2022-11-20 11:01:59,203 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2022-11-20 11:01:59,204 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 332 flow [2022-11-20 11:01:59,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:59,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:01:59,206 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] [2022-11-20 11:01:59,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:01:59,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:01:59,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:59,207 INFO L85 PathProgramCache]: Analyzing trace with hash -185894545, now seen corresponding path program 1 times [2022-11-20 11:01:59,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:59,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458579219] [2022-11-20 11:01:59,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:59,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:00,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:00,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458579219] [2022-11-20 11:02:00,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458579219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:00,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441843403] [2022-11-20 11:02:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:00,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:00,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:00,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:00,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:02:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:02:00,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:00,487 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 11 treesize of output 7 [2022-11-20 11:02:00,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:00,741 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 16 treesize of output 18 [2022-11-20 11:02:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:00,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:01,048 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_99 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_99) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456))) is different from false [2022-11-20 11:02:01,080 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_99 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_99) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456))) is different from false [2022-11-20 11:02:01,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:01,223 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 24 treesize of output 25 [2022-11-20 11:02:01,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:01,241 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 38 treesize of output 36 [2022-11-20 11:02:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:01,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441843403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:01,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:01,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-20 11:02:01,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132109693] [2022-11-20 11:02:01,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:01,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:02:01,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:01,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:02:01,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=929, Unknown=14, NotChecked=126, Total=1190 [2022-11-20 11:02:01,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 140 [2022-11-20 11:02:01,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 332 flow. Second operand has 35 states, 35 states have (on average 82.08571428571429) internal successors, (2873), 35 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:01,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:02:01,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 140 [2022-11-20 11:02:01,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:02:04,766 INFO L130 PetriNetUnfolder]: 1783/4589 cut-off events. [2022-11-20 11:02:04,766 INFO L131 PetriNetUnfolder]: For 358/464 co-relation queries the response was YES. [2022-11-20 11:02:04,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8803 conditions, 4589 events. 1783/4589 cut-off events. For 358/464 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 36421 event pairs, 668 based on Foata normal form. 4/2997 useless extension candidates. Maximal degree in co-relation 8712. Up to 2002 conditions per place. [2022-11-20 11:02:04,804 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 70 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2022-11-20 11:02:04,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 173 transitions, 681 flow [2022-11-20 11:02:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:02:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-20 11:02:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1620 transitions. [2022-11-20 11:02:04,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6090225563909775 [2022-11-20 11:02:04,812 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1620 transitions. [2022-11-20 11:02:04,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1620 transitions. [2022-11-20 11:02:04,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:02:04,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1620 transitions. [2022-11-20 11:02:04,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.26315789473684) internal successors, (1620), 19 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:04,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:04,827 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:04,828 INFO L175 Difference]: Start difference. First operand has 131 places, 121 transitions, 332 flow. Second operand 19 states and 1620 transitions. [2022-11-20 11:02:04,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 173 transitions, 681 flow [2022-11-20 11:02:04,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 173 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:02:04,835 INFO L231 Difference]: Finished difference. Result has 158 places, 150 transitions, 555 flow [2022-11-20 11:02:04,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=555, PETRI_PLACES=158, PETRI_TRANSITIONS=150} [2022-11-20 11:02:04,837 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 40 predicate places. [2022-11-20 11:02:04,837 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 150 transitions, 555 flow [2022-11-20 11:02:04,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 82.08571428571429) internal successors, (2873), 35 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:04,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:02:04,839 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] [2022-11-20 11:02:04,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:05,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:05,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:02:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -185894542, now seen corresponding path program 1 times [2022-11-20 11:02:05,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:05,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056903830] [2022-11-20 11:02:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:05,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:05,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056903830] [2022-11-20 11:02:05,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056903830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:05,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590668917] [2022-11-20 11:02:05,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:05,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:05,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:05,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:05,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:02:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:06,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:02:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:06,286 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 11 treesize of output 7 [2022-11-20 11:02:06,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:06,496 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 14 treesize of output 16 [2022-11-20 11:02:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:06,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:06,683 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_122 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_122) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-20 11:02:06,705 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_122 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_122) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 4294967295)) is different from false [2022-11-20 11:02:06,719 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_122 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_122) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 4294967295)) is different from false [2022-11-20 11:02:06,729 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_122 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_122) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295)) is different from false [2022-11-20 11:02:06,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:06,802 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 22 treesize of output 23 [2022-11-20 11:02:06,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:06,820 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 34 treesize of output 32 [2022-11-20 11:02:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 11:02:07,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590668917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:07,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:07,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-20 11:02:07,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597668629] [2022-11-20 11:02:07,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:07,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:02:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:07,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:02:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=827, Unknown=4, NotChecked=244, Total=1190 [2022-11-20 11:02:07,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 140 [2022-11-20 11:02:07,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 150 transitions, 555 flow. Second operand has 35 states, 35 states have (on average 82.08571428571429) internal successors, (2873), 35 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:07,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:02:07,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 140 [2022-11-20 11:02:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:02:10,470 INFO L130 PetriNetUnfolder]: 1861/4845 cut-off events. [2022-11-20 11:02:10,470 INFO L131 PetriNetUnfolder]: For 1074/1239 co-relation queries the response was YES. [2022-11-20 11:02:10,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10253 conditions, 4845 events. 1861/4845 cut-off events. For 1074/1239 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 39197 event pairs, 677 based on Foata normal form. 7/3262 useless extension candidates. Maximal degree in co-relation 10140. Up to 2129 conditions per place. [2022-11-20 11:02:10,528 INFO L137 encePairwiseOnDemand]: 119/140 looper letters, 70 selfloop transitions, 39 changer transitions 0/174 dead transitions. [2022-11-20 11:02:10,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 174 transitions, 850 flow [2022-11-20 11:02:10,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:02:10,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:02:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1531 transitions. [2022-11-20 11:02:10,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6075396825396825 [2022-11-20 11:02:10,534 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1531 transitions. [2022-11-20 11:02:10,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1531 transitions. [2022-11-20 11:02:10,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:02:10,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1531 transitions. [2022-11-20 11:02:10,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.05555555555556) internal successors, (1531), 18 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:10,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:10,547 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:10,547 INFO L175 Difference]: Start difference. First operand has 158 places, 150 transitions, 555 flow. Second operand 18 states and 1531 transitions. [2022-11-20 11:02:10,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 174 transitions, 850 flow [2022-11-20 11:02:10,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 174 transitions, 841 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:02:10,557 INFO L231 Difference]: Finished difference. Result has 171 places, 154 transitions, 658 flow [2022-11-20 11:02:10,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=658, PETRI_PLACES=171, PETRI_TRANSITIONS=154} [2022-11-20 11:02:10,560 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 53 predicate places. [2022-11-20 11:02:10,562 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 154 transitions, 658 flow [2022-11-20 11:02:10,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 82.08571428571429) internal successors, (2873), 35 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:10,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:02:10,564 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] [2022-11-20 11:02:10,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:10,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 11:02:10,771 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:02:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1743992822, now seen corresponding path program 1 times [2022-11-20 11:02:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:10,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180640505] [2022-11-20 11:02:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:02:10,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:10,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180640505] [2022-11-20 11:02:10,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180640505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:02:10,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:02:10,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:02:10,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418526984] [2022-11-20 11:02:10,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:02:10,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:02:10,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:02:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:02:10,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 140 [2022-11-20 11:02:10,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 154 transitions, 658 flow. Second operand has 4 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:10,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:02:10,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 140 [2022-11-20 11:02:10,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:02:12,172 INFO L130 PetriNetUnfolder]: 1171/3565 cut-off events. [2022-11-20 11:02:12,172 INFO L131 PetriNetUnfolder]: For 1586/1799 co-relation queries the response was YES. [2022-11-20 11:02:12,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8578 conditions, 3565 events. 1171/3565 cut-off events. For 1586/1799 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 31991 event pairs, 544 based on Foata normal form. 17/2369 useless extension candidates. Maximal degree in co-relation 8478. Up to 1303 conditions per place. [2022-11-20 11:02:12,205 INFO L137 encePairwiseOnDemand]: 134/140 looper letters, 66 selfloop transitions, 7 changer transitions 0/187 dead transitions. [2022-11-20 11:02:12,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 187 transitions, 939 flow [2022-11-20 11:02:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:02:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:02:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2022-11-20 11:02:12,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.83 [2022-11-20 11:02:12,209 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2022-11-20 11:02:12,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2022-11-20 11:02:12,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:02:12,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2022-11-20 11:02:12,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:12,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:12,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:12,216 INFO L175 Difference]: Start difference. First operand has 171 places, 154 transitions, 658 flow. Second operand 5 states and 581 transitions. [2022-11-20 11:02:12,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 187 transitions, 939 flow [2022-11-20 11:02:12,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 187 transitions, 905 flow, removed 3 selfloop flow, removed 13 redundant places. [2022-11-20 11:02:12,235 INFO L231 Difference]: Finished difference. Result has 165 places, 158 transitions, 679 flow [2022-11-20 11:02:12,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=679, PETRI_PLACES=165, PETRI_TRANSITIONS=158} [2022-11-20 11:02:12,237 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 47 predicate places. [2022-11-20 11:02:12,237 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 158 transitions, 679 flow [2022-11-20 11:02:12,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:12,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:02:12,238 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] [2022-11-20 11:02:12,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:02:12,238 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:02:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:12,239 INFO L85 PathProgramCache]: Analyzing trace with hash -193507723, now seen corresponding path program 1 times [2022-11-20 11:02:12,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:12,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070533335] [2022-11-20 11:02:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:12,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:13,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:13,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070533335] [2022-11-20 11:02:13,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070533335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:13,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320157798] [2022-11-20 11:02:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:13,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:13,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:13,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:13,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:02:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:13,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:02:13,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:13,714 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 11 treesize of output 7 [2022-11-20 11:02:13,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:13,995 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 14 treesize of output 16 [2022-11-20 11:02:14,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:14,117 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 14 treesize of output 16 [2022-11-20 11:02:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:14,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:16,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:16,921 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 25 treesize of output 26 [2022-11-20 11:02:16,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:16,934 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 126 treesize of output 120 [2022-11-20 11:02:16,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2022-11-20 11:02:16,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-11-20 11:02:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:17,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320157798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:17,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:17,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-20 11:02:17,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124775517] [2022-11-20 11:02:17,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:17,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:02:17,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:02:17,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1446, Unknown=48, NotChecked=0, Total=1640 [2022-11-20 11:02:17,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-20 11:02:17,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 158 transitions, 679 flow. Second operand has 41 states, 41 states have (on average 77.0) internal successors, (3157), 41 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:17,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:02:17,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-20 11:02:17,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:02:22,326 INFO L130 PetriNetUnfolder]: 2662/7427 cut-off events. [2022-11-20 11:02:22,327 INFO L131 PetriNetUnfolder]: For 5174/5575 co-relation queries the response was YES. [2022-11-20 11:02:22,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16703 conditions, 7427 events. 2662/7427 cut-off events. For 5174/5575 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 68466 event pairs, 1135 based on Foata normal form. 34/5217 useless extension candidates. Maximal degree in co-relation 16587. Up to 2255 conditions per place. [2022-11-20 11:02:22,396 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 114 selfloop transitions, 44 changer transitions 0/221 dead transitions. [2022-11-20 11:02:22,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 221 transitions, 1280 flow [2022-11-20 11:02:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:02:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-20 11:02:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1547 transitions. [2022-11-20 11:02:22,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5815789473684211 [2022-11-20 11:02:22,402 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1547 transitions. [2022-11-20 11:02:22,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1547 transitions. [2022-11-20 11:02:22,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:02:22,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1547 transitions. [2022-11-20 11:02:22,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 81.42105263157895) internal successors, (1547), 19 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:22,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:22,416 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:22,416 INFO L175 Difference]: Start difference. First operand has 165 places, 158 transitions, 679 flow. Second operand 19 states and 1547 transitions. [2022-11-20 11:02:22,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 221 transitions, 1280 flow [2022-11-20 11:02:22,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 221 transitions, 1276 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:02:22,431 INFO L231 Difference]: Finished difference. Result has 186 places, 172 transitions, 961 flow [2022-11-20 11:02:22,431 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=961, PETRI_PLACES=186, PETRI_TRANSITIONS=172} [2022-11-20 11:02:22,432 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 68 predicate places. [2022-11-20 11:02:22,433 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 172 transitions, 961 flow [2022-11-20 11:02:22,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 77.0) internal successors, (3157), 41 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:22,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:02:22,435 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] [2022-11-20 11:02:22,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:22,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:02:22,641 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:02:22,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash -193507726, now seen corresponding path program 1 times [2022-11-20 11:02:22,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:22,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668120286] [2022-11-20 11:02:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:22,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:23,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:23,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668120286] [2022-11-20 11:02:23,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668120286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:23,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298482811] [2022-11-20 11:02:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:23,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:23,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:23,599 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:23,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:02:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:23,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:02:23,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:23,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 11:02:23,941 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:02:23,941 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 11 treesize of output 11 [2022-11-20 11:02:24,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:02:24,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:24,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:02:24,645 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 16 treesize of output 18 [2022-11-20 11:02:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:24,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:24,762 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_189 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_189) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 9223372039002259456))) is different from false [2022-11-20 11:02:24,770 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_189 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_189) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-11-20 11:02:24,807 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_188 (Array Int Int)) (v_ArrVal_189 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_188) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_189) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-11-20 11:02:24,837 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_188 (Array Int Int)) (v_ArrVal_189 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_188) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_189) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456))) is different from false [2022-11-20 11:02:25,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:25,096 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 27 treesize of output 28 [2022-11-20 11:02:25,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:25,108 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 72 treesize of output 70 [2022-11-20 11:02:25,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-11-20 11:02:25,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-20 11:02:25,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:02:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:25,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298482811] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:25,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:25,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-20 11:02:25,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970861351] [2022-11-20 11:02:25,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:25,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:02:25,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:25,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:02:25,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1191, Unknown=18, NotChecked=292, Total=1640 [2022-11-20 11:02:25,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-20 11:02:25,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 172 transitions, 961 flow. Second operand has 41 states, 41 states have (on average 77.0) internal successors, (3157), 41 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:25,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:02:25,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-20 11:02:25,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:02:30,576 INFO L130 PetriNetUnfolder]: 2751/7227 cut-off events. [2022-11-20 11:02:30,576 INFO L131 PetriNetUnfolder]: For 8699/9115 co-relation queries the response was YES. [2022-11-20 11:02:30,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17962 conditions, 7227 events. 2751/7227 cut-off events. For 8699/9115 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 64608 event pairs, 1088 based on Foata normal form. 34/5036 useless extension candidates. Maximal degree in co-relation 17831. Up to 2366 conditions per place. [2022-11-20 11:02:30,647 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 113 selfloop transitions, 44 changer transitions 0/220 dead transitions. [2022-11-20 11:02:30,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 220 transitions, 1426 flow [2022-11-20 11:02:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:02:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-20 11:02:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1546 transitions. [2022-11-20 11:02:30,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5812030075187969 [2022-11-20 11:02:30,656 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1546 transitions. [2022-11-20 11:02:30,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1546 transitions. [2022-11-20 11:02:30,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:02:30,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1546 transitions. [2022-11-20 11:02:30,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 81.36842105263158) internal successors, (1546), 19 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:30,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:30,668 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:30,668 INFO L175 Difference]: Start difference. First operand has 186 places, 172 transitions, 961 flow. Second operand 19 states and 1546 transitions. [2022-11-20 11:02:30,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 220 transitions, 1426 flow [2022-11-20 11:02:30,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 220 transitions, 1400 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-11-20 11:02:30,698 INFO L231 Difference]: Finished difference. Result has 191 places, 172 transitions, 1021 flow [2022-11-20 11:02:30,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1021, PETRI_PLACES=191, PETRI_TRANSITIONS=172} [2022-11-20 11:02:30,699 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 73 predicate places. [2022-11-20 11:02:30,699 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 172 transitions, 1021 flow [2022-11-20 11:02:30,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 77.0) internal successors, (3157), 41 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:30,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:02:30,702 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] [2022-11-20 11:02:30,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:30,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:30,908 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:02:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:30,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1715045518, now seen corresponding path program 1 times [2022-11-20 11:02:30,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:30,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455120182] [2022-11-20 11:02:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:30,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:31,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455120182] [2022-11-20 11:02:31,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455120182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935116988] [2022-11-20 11:02:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:31,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:31,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:31,803 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:31,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:02:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:31,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:02:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:31,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 11:02:32,138 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:02:32,139 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 11 treesize of output 11 [2022-11-20 11:02:32,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:02:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:32,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:02:32,716 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 14 treesize of output 16 [2022-11-20 11:02:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:32,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:33,092 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_217 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_217) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456)) is different from false [2022-11-20 11:02:33,196 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_217 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_217) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456)) is different from false [2022-11-20 11:02:33,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:33,260 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 25 treesize of output 26 [2022-11-20 11:02:33,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:33,273 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 64 treesize of output 62 [2022-11-20 11:02:33,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-11-20 11:02:33,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-20 11:02:33,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:02:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 11:02:34,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935116988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:34,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:34,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-20 11:02:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956391081] [2022-11-20 11:02:34,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:34,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:02:34,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:02:34,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1311, Unknown=28, NotChecked=150, Total=1640 [2022-11-20 11:02:34,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-20 11:02:34,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 172 transitions, 1021 flow. Second operand has 41 states, 41 states have (on average 77.07317073170732) internal successors, (3160), 41 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:34,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:02:34,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-20 11:02:34,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:02:38,341 INFO L130 PetriNetUnfolder]: 2649/6922 cut-off events. [2022-11-20 11:02:38,342 INFO L131 PetriNetUnfolder]: For 13961/14494 co-relation queries the response was YES. [2022-11-20 11:02:38,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21218 conditions, 6922 events. 2649/6922 cut-off events. For 13961/14494 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 68298 event pairs, 908 based on Foata normal form. 4/4921 useless extension candidates. Maximal degree in co-relation 21086. Up to 1790 conditions per place. [2022-11-20 11:02:38,407 INFO L137 encePairwiseOnDemand]: 119/140 looper letters, 129 selfloop transitions, 28 changer transitions 0/232 dead transitions. [2022-11-20 11:02:38,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 232 transitions, 1733 flow [2022-11-20 11:02:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:02:38,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-20 11:02:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1543 transitions. [2022-11-20 11:02:38,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5800751879699249 [2022-11-20 11:02:38,412 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1543 transitions. [2022-11-20 11:02:38,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1543 transitions. [2022-11-20 11:02:38,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:02:38,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1543 transitions. [2022-11-20 11:02:38,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 81.21052631578948) internal successors, (1543), 19 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:38,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:38,424 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:38,424 INFO L175 Difference]: Start difference. First operand has 191 places, 172 transitions, 1021 flow. Second operand 19 states and 1543 transitions. [2022-11-20 11:02:38,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 232 transitions, 1733 flow [2022-11-20 11:02:38,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 232 transitions, 1696 flow, removed 3 selfloop flow, removed 14 redundant places. [2022-11-20 11:02:38,451 INFO L231 Difference]: Finished difference. Result has 198 places, 184 transitions, 1115 flow [2022-11-20 11:02:38,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1115, PETRI_PLACES=198, PETRI_TRANSITIONS=184} [2022-11-20 11:02:38,452 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 80 predicate places. [2022-11-20 11:02:38,452 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 184 transitions, 1115 flow [2022-11-20 11:02:38,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 77.07317073170732) internal successors, (3160), 41 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:38,454 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:02:38,454 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] [2022-11-20 11:02:38,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:38,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:38,661 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:02:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:38,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1715045515, now seen corresponding path program 1 times [2022-11-20 11:02:38,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:38,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041070612] [2022-11-20 11:02:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:38,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:39,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:39,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041070612] [2022-11-20 11:02:39,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041070612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:39,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344208349] [2022-11-20 11:02:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:39,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:39,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:39,751 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:39,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:02:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:39,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:02:39,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:39,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 11:02:39,963 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 11:02:39,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2022-11-20 11:02:40,133 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-20 11:02:40,133 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 16 treesize of output 18 [2022-11-20 11:02:40,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:02:40,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:02:40,694 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 16 treesize of output 18 [2022-11-20 11:02:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:40,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:40,895 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_248 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_248) c_~A~0.base) c_~A~0.offset) 4294967295))) is different from false [2022-11-20 11:02:41,245 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_248 (Array Int Int)) (v_ArrVal_247 (Array Int Int))) (<= 0 (+ 4294967295 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_247) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_248) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) is different from false [2022-11-20 11:02:41,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:41,296 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 27 treesize of output 28 [2022-11-20 11:02:41,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:41,311 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 72 treesize of output 70 [2022-11-20 11:02:41,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-11-20 11:02:41,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-11-20 11:02:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 11:02:41,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344208349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:41,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:41,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-11-20 11:02:41,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758811630] [2022-11-20 11:02:41,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:41,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 11:02:41,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:41,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 11:02:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1184, Unknown=13, NotChecked=142, Total=1482 [2022-11-20 11:02:41,820 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-20 11:02:41,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 184 transitions, 1115 flow. Second operand has 39 states, 39 states have (on average 77.1025641025641) internal successors, (3007), 39 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:41,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:02:41,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-20 11:02:41,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:02:45,127 INFO L130 PetriNetUnfolder]: 2607/6778 cut-off events. [2022-11-20 11:02:45,127 INFO L131 PetriNetUnfolder]: For 14663/15208 co-relation queries the response was YES. [2022-11-20 11:02:45,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23035 conditions, 6778 events. 2607/6778 cut-off events. For 14663/15208 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 66001 event pairs, 946 based on Foata normal form. 38/5106 useless extension candidates. Maximal degree in co-relation 22898. Up to 1790 conditions per place. [2022-11-20 11:02:45,188 INFO L137 encePairwiseOnDemand]: 119/140 looper letters, 128 selfloop transitions, 28 changer transitions 0/231 dead transitions. [2022-11-20 11:02:45,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 231 transitions, 1781 flow [2022-11-20 11:02:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:02:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-20 11:02:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1542 transitions. [2022-11-20 11:02:45,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5796992481203007 [2022-11-20 11:02:45,194 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1542 transitions. [2022-11-20 11:02:45,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1542 transitions. [2022-11-20 11:02:45,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:02:45,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1542 transitions. [2022-11-20 11:02:45,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 81.15789473684211) internal successors, (1542), 19 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:45,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:45,205 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:45,205 INFO L175 Difference]: Start difference. First operand has 198 places, 184 transitions, 1115 flow. Second operand 19 states and 1542 transitions. [2022-11-20 11:02:45,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 231 transitions, 1781 flow [2022-11-20 11:02:45,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 231 transitions, 1755 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-11-20 11:02:45,248 INFO L231 Difference]: Finished difference. Result has 203 places, 184 transitions, 1145 flow [2022-11-20 11:02:45,248 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1145, PETRI_PLACES=203, PETRI_TRANSITIONS=184} [2022-11-20 11:02:45,249 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 85 predicate places. [2022-11-20 11:02:45,249 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 184 transitions, 1145 flow [2022-11-20 11:02:45,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 77.1025641025641) internal successors, (3007), 39 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:45,251 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:02:45,251 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:02:45,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:45,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 11:02:45,458 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:02:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash 953497169, now seen corresponding path program 1 times [2022-11-20 11:02:45,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:45,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765004736] [2022-11-20 11:02:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:45,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:45,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:45,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765004736] [2022-11-20 11:02:45,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765004736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:45,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681251879] [2022-11-20 11:02:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:45,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:45,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:45,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:45,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:02:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:45,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:02:45,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:46,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:46,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681251879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:46,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:46,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-20 11:02:46,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053483774] [2022-11-20 11:02:46,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:46,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:02:46,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:02:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:02:46,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 140 [2022-11-20 11:02:46,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 184 transitions, 1145 flow. Second operand has 24 states, 24 states have (on average 86.83333333333333) internal successors, (2084), 24 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:46,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:02:46,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 140 [2022-11-20 11:02:46,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:02:48,489 INFO L130 PetriNetUnfolder]: 1460/4483 cut-off events. [2022-11-20 11:02:48,489 INFO L131 PetriNetUnfolder]: For 7814/7990 co-relation queries the response was YES. [2022-11-20 11:02:48,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14432 conditions, 4483 events. 1460/4483 cut-off events. For 7814/7990 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 38326 event pairs, 877 based on Foata normal form. 18/3351 useless extension candidates. Maximal degree in co-relation 14300. Up to 2288 conditions per place. [2022-11-20 11:02:48,513 INFO L137 encePairwiseOnDemand]: 124/140 looper letters, 135 selfloop transitions, 23 changer transitions 5/242 dead transitions. [2022-11-20 11:02:48,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 242 transitions, 1616 flow [2022-11-20 11:02:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:02:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-20 11:02:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1557 transitions. [2022-11-20 11:02:48,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6542016806722689 [2022-11-20 11:02:48,518 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1557 transitions. [2022-11-20 11:02:48,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1557 transitions. [2022-11-20 11:02:48,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:02:48,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1557 transitions. [2022-11-20 11:02:48,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.58823529411765) internal successors, (1557), 17 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:48,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:48,529 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:48,530 INFO L175 Difference]: Start difference. First operand has 203 places, 184 transitions, 1145 flow. Second operand 17 states and 1557 transitions. [2022-11-20 11:02:48,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 242 transitions, 1616 flow [2022-11-20 11:02:48,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 242 transitions, 1554 flow, removed 10 selfloop flow, removed 19 redundant places. [2022-11-20 11:02:48,570 INFO L231 Difference]: Finished difference. Result has 201 places, 168 transitions, 930 flow [2022-11-20 11:02:48,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=930, PETRI_PLACES=201, PETRI_TRANSITIONS=168} [2022-11-20 11:02:48,572 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 83 predicate places. [2022-11-20 11:02:48,572 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 168 transitions, 930 flow [2022-11-20 11:02:48,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.83333333333333) internal successors, (2084), 24 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:48,573 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:02:48,573 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] [2022-11-20 11:02:48,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:48,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:02:48,780 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:02:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:48,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1108723641, now seen corresponding path program 1 times [2022-11-20 11:02:48,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:48,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287012858] [2022-11-20 11:02:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:48,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:02:48,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:48,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287012858] [2022-11-20 11:02:48,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287012858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:02:48,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:02:48,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:02:48,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583721134] [2022-11-20 11:02:48,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:02:48,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:02:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:02:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:02:48,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 140 [2022-11-20 11:02:48,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 168 transitions, 930 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:48,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:02:48,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 140 [2022-11-20 11:02:48,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:02:50,335 INFO L130 PetriNetUnfolder]: 2042/4698 cut-off events. [2022-11-20 11:02:50,335 INFO L131 PetriNetUnfolder]: For 13820/14391 co-relation queries the response was YES. [2022-11-20 11:02:50,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20642 conditions, 4698 events. 2042/4698 cut-off events. For 13820/14391 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 40657 event pairs, 368 based on Foata normal form. 4/3231 useless extension candidates. Maximal degree in co-relation 20523. Up to 2320 conditions per place. [2022-11-20 11:02:50,376 INFO L137 encePairwiseOnDemand]: 134/140 looper letters, 77 selfloop transitions, 6 changer transitions 0/209 dead transitions. [2022-11-20 11:02:50,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 209 transitions, 1481 flow [2022-11-20 11:02:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:02:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:02:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 580 transitions. [2022-11-20 11:02:50,379 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-11-20 11:02:50,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 580 transitions. [2022-11-20 11:02:50,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 580 transitions. [2022-11-20 11:02:50,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:02:50,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 580 transitions. [2022-11-20 11:02:50,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:50,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:50,384 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:50,384 INFO L175 Difference]: Start difference. First operand has 201 places, 168 transitions, 930 flow. Second operand 5 states and 580 transitions. [2022-11-20 11:02:50,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 209 transitions, 1481 flow [2022-11-20 11:02:50,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 209 transitions, 1464 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-20 11:02:50,410 INFO L231 Difference]: Finished difference. Result has 202 places, 171 transitions, 955 flow [2022-11-20 11:02:50,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=955, PETRI_PLACES=202, PETRI_TRANSITIONS=171} [2022-11-20 11:02:50,411 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 84 predicate places. [2022-11-20 11:02:50,411 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 171 transitions, 955 flow [2022-11-20 11:02:50,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:50,412 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:02:50,412 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:02:50,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:02:50,413 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:02:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash -175096051, now seen corresponding path program 2 times [2022-11-20 11:02:50,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:50,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721868340] [2022-11-20 11:02:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:50,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:51,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721868340] [2022-11-20 11:02:51,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721868340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930835499] [2022-11-20 11:02:51,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:02:51,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:51,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:51,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:51,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:02:51,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:02:51,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:02:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:02:51,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:51,701 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 [2022-11-20 11:02:51,922 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 11:02:51,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 23 treesize of output 22 [2022-11-20 11:02:52,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:52,165 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 14 treesize of output 16 [2022-11-20 11:02:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:52,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:52,519 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_309 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 4294967295)) is different from false [2022-11-20 11:02:52,526 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_309 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295)) is different from false [2022-11-20 11:02:54,897 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_32| Int) (v_ArrVal_309 (Array Int Int)) (v_ArrVal_307 Int)) (or (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_32| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_32| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_307)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295))) is different from false [2022-11-20 11:02:54,959 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 11:02:54,959 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 2 case distinctions, treesize of input 29 treesize of output 35 [2022-11-20 11:02:54,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:54,974 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 34 treesize of output 32 [2022-11-20 11:02:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-20 11:02:55,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930835499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:55,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:55,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-20 11:02:55,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595709604] [2022-11-20 11:02:55,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:55,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:02:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:02:55,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1395, Unknown=18, NotChecked=234, Total=1806 [2022-11-20 11:02:55,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-20 11:02:55,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 171 transitions, 955 flow. Second operand has 43 states, 43 states have (on average 77.53488372093024) internal successors, (3334), 43 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:55,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:02:55,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-20 11:02:55,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:00,020 INFO L130 PetriNetUnfolder]: 2999/8989 cut-off events. [2022-11-20 11:03:00,020 INFO L131 PetriNetUnfolder]: For 19691/20118 co-relation queries the response was YES. [2022-11-20 11:03:00,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30186 conditions, 8989 events. 2999/8989 cut-off events. For 19691/20118 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 90519 event pairs, 1162 based on Foata normal form. 80/7659 useless extension candidates. Maximal degree in co-relation 30048. Up to 3350 conditions per place. [2022-11-20 11:03:00,095 INFO L137 encePairwiseOnDemand]: 116/140 looper letters, 92 selfloop transitions, 58 changer transitions 0/215 dead transitions. [2022-11-20 11:03:00,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 215 transitions, 1591 flow [2022-11-20 11:03:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:03:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 11:03:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1737 transitions. [2022-11-20 11:03:00,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.563961038961039 [2022-11-20 11:03:00,100 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1737 transitions. [2022-11-20 11:03:00,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1737 transitions. [2022-11-20 11:03:00,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:00,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1737 transitions. [2022-11-20 11:03:00,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.95454545454545) internal successors, (1737), 22 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:00,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:00,115 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:00,116 INFO L175 Difference]: Start difference. First operand has 202 places, 171 transitions, 955 flow. Second operand 22 states and 1737 transitions. [2022-11-20 11:03:00,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 215 transitions, 1591 flow [2022-11-20 11:03:00,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 215 transitions, 1588 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:03:00,218 INFO L231 Difference]: Finished difference. Result has 225 places, 183 transitions, 1264 flow [2022-11-20 11:03:00,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1264, PETRI_PLACES=225, PETRI_TRANSITIONS=183} [2022-11-20 11:03:00,219 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 107 predicate places. [2022-11-20 11:03:00,219 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 183 transitions, 1264 flow [2022-11-20 11:03:00,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.53488372093024) internal successors, (3334), 43 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:00,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:00,221 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] [2022-11-20 11:03:00,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:00,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:03:00,429 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:03:00,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:00,430 INFO L85 PathProgramCache]: Analyzing trace with hash -103249498, now seen corresponding path program 1 times [2022-11-20 11:03:00,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:00,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319927635] [2022-11-20 11:03:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:00,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:03:00,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:00,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319927635] [2022-11-20 11:03:00,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319927635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:03:00,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:03:00,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:03:00,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634204748] [2022-11-20 11:03:00,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:03:00,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:03:00,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:00,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:03:00,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:03:00,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 140 [2022-11-20 11:03:00,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 183 transitions, 1264 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:00,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:00,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 140 [2022-11-20 11:03:00,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:01,528 INFO L130 PetriNetUnfolder]: 476/2493 cut-off events. [2022-11-20 11:03:01,528 INFO L131 PetriNetUnfolder]: For 7935/8143 co-relation queries the response was YES. [2022-11-20 11:03:01,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8757 conditions, 2493 events. 476/2493 cut-off events. For 7935/8143 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 23218 event pairs, 238 based on Foata normal form. 12/2098 useless extension candidates. Maximal degree in co-relation 8626. Up to 946 conditions per place. [2022-11-20 11:03:01,548 INFO L137 encePairwiseOnDemand]: 137/140 looper letters, 29 selfloop transitions, 1 changer transitions 0/177 dead transitions. [2022-11-20 11:03:01,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 177 transitions, 1249 flow [2022-11-20 11:03:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:03:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:03:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-11-20 11:03:01,550 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8404761904761905 [2022-11-20 11:03:01,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-11-20 11:03:01,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-11-20 11:03:01,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:01,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-11-20 11:03:01,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:01,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:01,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:01,554 INFO L175 Difference]: Start difference. First operand has 225 places, 183 transitions, 1264 flow. Second operand 3 states and 353 transitions. [2022-11-20 11:03:01,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 177 transitions, 1249 flow [2022-11-20 11:03:01,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 177 transitions, 1148 flow, removed 2 selfloop flow, removed 18 redundant places. [2022-11-20 11:03:01,585 INFO L231 Difference]: Finished difference. Result has 207 places, 177 transitions, 1090 flow [2022-11-20 11:03:01,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1090, PETRI_PLACES=207, PETRI_TRANSITIONS=177} [2022-11-20 11:03:01,586 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 89 predicate places. [2022-11-20 11:03:01,586 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 177 transitions, 1090 flow [2022-11-20 11:03:01,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:01,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:01,587 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:03:01,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:03:01,587 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:03:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash -175096054, now seen corresponding path program 2 times [2022-11-20 11:03:01,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:01,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878675194] [2022-11-20 11:03:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:01,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:02,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878675194] [2022-11-20 11:03:02,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878675194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:02,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106590748] [2022-11-20 11:03:02,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:03:02,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:02,430 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:02,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:03:02,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:03:02,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:02,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:03:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:02,807 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 [2022-11-20 11:03:03,017 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 11:03:03,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 25 treesize of output 24 [2022-11-20 11:03:03,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:03,289 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 16 treesize of output 18 [2022-11-20 11:03:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:03,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:06,507 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 11:03:06,508 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 2 case distinctions, treesize of input 31 treesize of output 37 [2022-11-20 11:03:06,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:03:06,521 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 38 treesize of output 36 [2022-11-20 11:03:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:08,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106590748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:08,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:08,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-20 11:03:08,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745405786] [2022-11-20 11:03:08,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:08,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:03:08,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:08,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:03:08,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1590, Unknown=41, NotChecked=0, Total=1806 [2022-11-20 11:03:08,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-20 11:03:08,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 177 transitions, 1090 flow. Second operand has 43 states, 43 states have (on average 77.53488372093024) internal successors, (3334), 43 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:08,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:08,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-20 11:03:08,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:12,537 INFO L130 PetriNetUnfolder]: 2288/7187 cut-off events. [2022-11-20 11:03:12,537 INFO L131 PetriNetUnfolder]: For 18328/18642 co-relation queries the response was YES. [2022-11-20 11:03:12,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23317 conditions, 7187 events. 2288/7187 cut-off events. For 18328/18642 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 70229 event pairs, 877 based on Foata normal form. 83/6505 useless extension candidates. Maximal degree in co-relation 23262. Up to 2653 conditions per place. [2022-11-20 11:03:12,599 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 87 selfloop transitions, 52 changer transitions 0/204 dead transitions. [2022-11-20 11:03:12,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 204 transitions, 1519 flow [2022-11-20 11:03:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:03:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:03:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1657 transitions. [2022-11-20 11:03:12,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5636054421768707 [2022-11-20 11:03:12,604 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1657 transitions. [2022-11-20 11:03:12,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1657 transitions. [2022-11-20 11:03:12,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:12,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1657 transitions. [2022-11-20 11:03:12,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.9047619047619) internal successors, (1657), 21 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:12,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:12,615 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:12,616 INFO L175 Difference]: Start difference. First operand has 207 places, 177 transitions, 1090 flow. Second operand 21 states and 1657 transitions. [2022-11-20 11:03:12,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 204 transitions, 1519 flow [2022-11-20 11:03:12,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 204 transitions, 1518 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:03:12,684 INFO L231 Difference]: Finished difference. Result has 226 places, 176 transitions, 1184 flow [2022-11-20 11:03:12,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1184, PETRI_PLACES=226, PETRI_TRANSITIONS=176} [2022-11-20 11:03:12,686 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 108 predicate places. [2022-11-20 11:03:12,686 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 176 transitions, 1184 flow [2022-11-20 11:03:12,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.53488372093024) internal successors, (3334), 43 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:12,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:12,687 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] [2022-11-20 11:03:12,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:12,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:03:12,895 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:03:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:12,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1016713063, now seen corresponding path program 1 times [2022-11-20 11:03:12,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:12,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414126010] [2022-11-20 11:03:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:12,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:03:13,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:13,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414126010] [2022-11-20 11:03:13,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414126010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:03:13,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:03:13,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:03:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359743966] [2022-11-20 11:03:13,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:03:13,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:03:13,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:03:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:03:13,108 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 140 [2022-11-20 11:03:13,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 176 transitions, 1184 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:13,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:13,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 140 [2022-11-20 11:03:13,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:13,552 INFO L130 PetriNetUnfolder]: 259/1989 cut-off events. [2022-11-20 11:03:13,552 INFO L131 PetriNetUnfolder]: For 5693/5743 co-relation queries the response was YES. [2022-11-20 11:03:13,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5877 conditions, 1989 events. 259/1989 cut-off events. For 5693/5743 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 17792 event pairs, 159 based on Foata normal form. 9/1869 useless extension candidates. Maximal degree in co-relation 5825. Up to 583 conditions per place. [2022-11-20 11:03:13,572 INFO L137 encePairwiseOnDemand]: 137/140 looper letters, 23 selfloop transitions, 1 changer transitions 0/170 dead transitions. [2022-11-20 11:03:13,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 170 transitions, 1157 flow [2022-11-20 11:03:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:03:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:03:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2022-11-20 11:03:13,574 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8357142857142857 [2022-11-20 11:03:13,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2022-11-20 11:03:13,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2022-11-20 11:03:13,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:13,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2022-11-20 11:03:13,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:13,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:13,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:13,577 INFO L175 Difference]: Start difference. First operand has 226 places, 176 transitions, 1184 flow. Second operand 3 states and 351 transitions. [2022-11-20 11:03:13,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 170 transitions, 1157 flow [2022-11-20 11:03:13,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 170 transitions, 1073 flow, removed 3 selfloop flow, removed 18 redundant places. [2022-11-20 11:03:13,601 INFO L231 Difference]: Finished difference. Result has 208 places, 170 transitions, 1027 flow [2022-11-20 11:03:13,602 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1027, PETRI_PLACES=208, PETRI_TRANSITIONS=170} [2022-11-20 11:03:13,602 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 90 predicate places. [2022-11-20 11:03:13,603 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 170 transitions, 1027 flow [2022-11-20 11:03:13,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:13,603 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:13,603 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:03:13,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 11:03:13,604 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:03:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1227340929, now seen corresponding path program 1 times [2022-11-20 11:03:13,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:13,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758137] [2022-11-20 11:03:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:13,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:13,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758137] [2022-11-20 11:03:13,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737076320] [2022-11-20 11:03:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:13,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:13,843 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:13,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:03:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:14,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:03:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:14,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:14,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737076320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:14,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:14,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-20 11:03:14,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690130189] [2022-11-20 11:03:14,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:14,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:03:14,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:03:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:03:14,624 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 140 [2022-11-20 11:03:14,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 170 transitions, 1027 flow. Second operand has 24 states, 24 states have (on average 86.875) internal successors, (2085), 24 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:14,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:14,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 140 [2022-11-20 11:03:14,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:15,969 INFO L130 PetriNetUnfolder]: 996/3331 cut-off events. [2022-11-20 11:03:15,970 INFO L131 PetriNetUnfolder]: For 10392/10498 co-relation queries the response was YES. [2022-11-20 11:03:15,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 3331 events. 996/3331 cut-off events. For 10392/10498 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 27716 event pairs, 710 based on Foata normal form. 18/3193 useless extension candidates. Maximal degree in co-relation 11591. Up to 2129 conditions per place. [2022-11-20 11:03:15,998 INFO L137 encePairwiseOnDemand]: 124/140 looper letters, 59 selfloop transitions, 14 changer transitions 62/214 dead transitions. [2022-11-20 11:03:15,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 214 transitions, 1509 flow [2022-11-20 11:03:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:03:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-20 11:03:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1524 transitions. [2022-11-20 11:03:16,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6403361344537815 [2022-11-20 11:03:16,002 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1524 transitions. [2022-11-20 11:03:16,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1524 transitions. [2022-11-20 11:03:16,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:16,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1524 transitions. [2022-11-20 11:03:16,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.6470588235294) internal successors, (1524), 17 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:16,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:16,012 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:16,012 INFO L175 Difference]: Start difference. First operand has 208 places, 170 transitions, 1027 flow. Second operand 17 states and 1524 transitions. [2022-11-20 11:03:16,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 214 transitions, 1509 flow [2022-11-20 11:03:16,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 214 transitions, 1505 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:03:16,041 INFO L231 Difference]: Finished difference. Result has 223 places, 142 transitions, 793 flow [2022-11-20 11:03:16,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=793, PETRI_PLACES=223, PETRI_TRANSITIONS=142} [2022-11-20 11:03:16,042 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 105 predicate places. [2022-11-20 11:03:16,042 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 142 transitions, 793 flow [2022-11-20 11:03:16,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.875) internal successors, (2085), 24 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:16,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:16,044 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:03:16,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:16,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:16,251 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:03:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1989913479, now seen corresponding path program 2 times [2022-11-20 11:03:16,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:16,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937869242] [2022-11-20 11:03:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:16,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:17,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:17,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937869242] [2022-11-20 11:03:17,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937869242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:17,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020655269] [2022-11-20 11:03:17,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:03:17,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:17,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:17,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:03:17,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:03:17,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:17,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:03:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:17,774 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 [2022-11-20 11:03:18,040 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 11:03:18,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 25 treesize of output 24 [2022-11-20 11:03:18,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:18,374 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 16 treesize of output 18 [2022-11-20 11:03:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:18,528 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 16 treesize of output 18 [2022-11-20 11:03:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:18,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:18,635 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_420 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_420) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 9223372039002259456))) is different from false [2022-11-20 11:03:18,661 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_420 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_420) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-11-20 11:03:19,920 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 11:03:19,921 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 2 case distinctions, treesize of input 34 treesize of output 40 [2022-11-20 11:03:19,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:03:19,935 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 72 treesize of output 70 [2022-11-20 11:03:19,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-11-20 11:03:19,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-20 11:03:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:20,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020655269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:20,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:20,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-11-20 11:03:20,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937051157] [2022-11-20 11:03:20,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:20,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:03:20,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:20,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:03:20,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1941, Unknown=42, NotChecked=182, Total=2352 [2022-11-20 11:03:20,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2022-11-20 11:03:20,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 142 transitions, 793 flow. Second operand has 49 states, 49 states have (on average 72.40816326530613) internal successors, (3548), 49 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:20,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:20,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2022-11-20 11:03:20,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:24,367 INFO L130 PetriNetUnfolder]: 1342/4637 cut-off events. [2022-11-20 11:03:24,368 INFO L131 PetriNetUnfolder]: For 13939/14140 co-relation queries the response was YES. [2022-11-20 11:03:24,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14631 conditions, 4637 events. 1342/4637 cut-off events. For 13939/14140 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 43877 event pairs, 810 based on Foata normal form. 54/4526 useless extension candidates. Maximal degree in co-relation 14590. Up to 903 conditions per place. [2022-11-20 11:03:24,398 INFO L137 encePairwiseOnDemand]: 119/140 looper letters, 69 selfloop transitions, 35 changer transitions 0/162 dead transitions. [2022-11-20 11:03:24,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 162 transitions, 1109 flow [2022-11-20 11:03:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:03:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:03:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1549 transitions. [2022-11-20 11:03:24,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5268707482993197 [2022-11-20 11:03:24,402 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1549 transitions. [2022-11-20 11:03:24,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1549 transitions. [2022-11-20 11:03:24,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:24,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1549 transitions. [2022-11-20 11:03:24,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 73.76190476190476) internal successors, (1549), 21 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:24,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:24,412 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:24,412 INFO L175 Difference]: Start difference. First operand has 223 places, 142 transitions, 793 flow. Second operand 21 states and 1549 transitions. [2022-11-20 11:03:24,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 162 transitions, 1109 flow [2022-11-20 11:03:24,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 162 transitions, 917 flow, removed 20 selfloop flow, removed 32 redundant places. [2022-11-20 11:03:24,471 INFO L231 Difference]: Finished difference. Result has 191 places, 144 transitions, 749 flow [2022-11-20 11:03:24,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=749, PETRI_PLACES=191, PETRI_TRANSITIONS=144} [2022-11-20 11:03:24,472 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 73 predicate places. [2022-11-20 11:03:24,473 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 144 transitions, 749 flow [2022-11-20 11:03:24,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 72.40816326530613) internal successors, (3548), 49 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:24,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:24,474 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:03:24,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:24,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:24,687 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:03:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:24,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1698165946, now seen corresponding path program 2 times [2022-11-20 11:03:24,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:24,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545180135] [2022-11-20 11:03:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:24,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:25,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:25,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545180135] [2022-11-20 11:03:25,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545180135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168623531] [2022-11-20 11:03:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:03:25,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:25,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:25,803 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:25,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:03:25,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:03:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:25,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:03:25,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:26,330 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 [2022-11-20 11:03:26,616 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 11:03:26,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 23 treesize of output 22 [2022-11-20 11:03:26,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:26,929 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 14 treesize of output 16 [2022-11-20 11:03:27,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:27,085 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 14 treesize of output 16 [2022-11-20 11:03:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:27,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:27,211 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_454 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 4294967295)) is different from false [2022-11-20 11:03:27,231 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_454 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-20 11:03:27,694 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_453 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_453) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295)) is different from false [2022-11-20 11:03:30,199 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_47| Int) (v_ArrVal_451 Int) (v_ArrVal_454 (Array Int Int)) (v_ArrVal_453 (Array Int Int))) (or (<= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_47| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_451)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_453) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295) (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_47| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)))) is different from false [2022-11-20 11:03:30,249 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 11:03:30,249 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 2 case distinctions, treesize of input 32 treesize of output 38 [2022-11-20 11:03:30,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:03:30,261 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 64 treesize of output 62 [2022-11-20 11:03:30,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-11-20 11:03:30,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-20 11:03:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-20 11:03:30,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168623531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:30,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:30,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-11-20 11:03:30,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984936093] [2022-11-20 11:03:30,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:30,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:03:30,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:30,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:03:30,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1793, Unknown=31, NotChecked=356, Total=2352 [2022-11-20 11:03:30,769 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2022-11-20 11:03:30,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 144 transitions, 749 flow. Second operand has 49 states, 49 states have (on average 72.40816326530613) internal successors, (3548), 49 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:30,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:30,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2022-11-20 11:03:30,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:35,337 INFO L130 PetriNetUnfolder]: 1413/4767 cut-off events. [2022-11-20 11:03:35,337 INFO L131 PetriNetUnfolder]: For 9270/9451 co-relation queries the response was YES. [2022-11-20 11:03:35,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12195 conditions, 4767 events. 1413/4767 cut-off events. For 9270/9451 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 44649 event pairs, 738 based on Foata normal form. 28/4431 useless extension candidates. Maximal degree in co-relation 12169. Up to 1274 conditions per place. [2022-11-20 11:03:35,375 INFO L137 encePairwiseOnDemand]: 117/140 looper letters, 115 selfloop transitions, 45 changer transitions 0/218 dead transitions. [2022-11-20 11:03:35,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 218 transitions, 1521 flow [2022-11-20 11:03:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:03:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-20 11:03:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1731 transitions. [2022-11-20 11:03:35,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5375776397515528 [2022-11-20 11:03:35,378 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1731 transitions. [2022-11-20 11:03:35,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1731 transitions. [2022-11-20 11:03:35,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:35,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1731 transitions. [2022-11-20 11:03:35,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 75.26086956521739) internal successors, (1731), 23 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:35,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 140.0) internal successors, (3360), 24 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:35,389 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 140.0) internal successors, (3360), 24 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:35,389 INFO L175 Difference]: Start difference. First operand has 191 places, 144 transitions, 749 flow. Second operand 23 states and 1731 transitions. [2022-11-20 11:03:35,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 218 transitions, 1521 flow [2022-11-20 11:03:35,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 218 transitions, 1459 flow, removed 0 selfloop flow, removed 18 redundant places. [2022-11-20 11:03:35,423 INFO L231 Difference]: Finished difference. Result has 205 places, 168 transitions, 1133 flow [2022-11-20 11:03:35,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1133, PETRI_PLACES=205, PETRI_TRANSITIONS=168} [2022-11-20 11:03:35,424 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 87 predicate places. [2022-11-20 11:03:35,424 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 168 transitions, 1133 flow [2022-11-20 11:03:35,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 72.40816326530613) internal successors, (3548), 49 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:35,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:35,427 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:03:35,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:35,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 11:03:35,633 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:03:35,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:35,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1033281328, now seen corresponding path program 2 times [2022-11-20 11:03:35,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:35,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300242867] [2022-11-20 11:03:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:35,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:36,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:36,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300242867] [2022-11-20 11:03:36,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300242867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:36,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444275647] [2022-11-20 11:03:36,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:03:36,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:36,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:36,663 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:36,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:03:36,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:03:36,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:36,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:03:36,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:37,201 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 [2022-11-20 11:03:37,466 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 11:03:37,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 25 treesize of output 24 [2022-11-20 11:03:37,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:37,789 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 16 treesize of output 18 [2022-11-20 11:03:37,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:37,867 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 16 treesize of output 18 [2022-11-20 11:03:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:37,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:38,061 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_488 (Array Int Int))) (<= 0 (+ 4294967295 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_488) c_~A~0.base) c_~A~0.offset)))) is different from false [2022-11-20 11:03:41,013 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_485 Int) (v_ArrVal_487 (Array Int Int)) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_51| Int) (v_ArrVal_488 (Array Int Int))) (or (<= 0 (+ (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_51| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_485)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_487) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_488) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295)) (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_51| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)))) is different from false [2022-11-20 11:03:41,061 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 11:03:41,062 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 2 case distinctions, treesize of input 34 treesize of output 40 [2022-11-20 11:03:41,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:03:41,073 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 72 treesize of output 70 [2022-11-20 11:03:41,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-11-20 11:03:41,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-11-20 11:03:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-20 11:03:41,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444275647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:41,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:41,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-20 11:03:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855529121] [2022-11-20 11:03:41,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:41,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:03:41,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:03:41,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1851, Unknown=35, NotChecked=178, Total=2256 [2022-11-20 11:03:41,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 140 [2022-11-20 11:03:41,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 168 transitions, 1133 flow. Second operand has 48 states, 48 states have (on average 75.39583333333333) internal successors, (3619), 48 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:41,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:41,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 140 [2022-11-20 11:03:41,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:45,220 INFO L130 PetriNetUnfolder]: 1319/3874 cut-off events. [2022-11-20 11:03:45,220 INFO L131 PetriNetUnfolder]: For 13714/13900 co-relation queries the response was YES. [2022-11-20 11:03:45,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12198 conditions, 3874 events. 1319/3874 cut-off events. For 13714/13900 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 35132 event pairs, 416 based on Foata normal form. 82/3717 useless extension candidates. Maximal degree in co-relation 12162. Up to 1063 conditions per place. [2022-11-20 11:03:45,254 INFO L137 encePairwiseOnDemand]: 119/140 looper letters, 93 selfloop transitions, 32 changer transitions 0/199 dead transitions. [2022-11-20 11:03:45,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 199 transitions, 1693 flow [2022-11-20 11:03:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:03:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:03:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1607 transitions. [2022-11-20 11:03:45,258 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5465986394557824 [2022-11-20 11:03:45,258 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1607 transitions. [2022-11-20 11:03:45,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1607 transitions. [2022-11-20 11:03:45,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:45,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1607 transitions. [2022-11-20 11:03:45,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 76.52380952380952) internal successors, (1607), 21 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:45,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:45,268 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:45,268 INFO L175 Difference]: Start difference. First operand has 205 places, 168 transitions, 1133 flow. Second operand 21 states and 1607 transitions. [2022-11-20 11:03:45,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 199 transitions, 1693 flow [2022-11-20 11:03:45,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 199 transitions, 1662 flow, removed 4 selfloop flow, removed 12 redundant places. [2022-11-20 11:03:45,302 INFO L231 Difference]: Finished difference. Result has 215 places, 170 transitions, 1191 flow [2022-11-20 11:03:45,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1191, PETRI_PLACES=215, PETRI_TRANSITIONS=170} [2022-11-20 11:03:45,303 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 97 predicate places. [2022-11-20 11:03:45,304 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 170 transitions, 1191 flow [2022-11-20 11:03:45,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 75.39583333333333) internal successors, (3619), 48 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:45,305 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:45,305 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:03:45,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:45,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:45,511 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:03:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:45,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1033281331, now seen corresponding path program 2 times [2022-11-20 11:03:45,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:45,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468750063] [2022-11-20 11:03:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:45,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:46,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:46,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468750063] [2022-11-20 11:03:46,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468750063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:46,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218400344] [2022-11-20 11:03:46,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:03:46,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:46,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:46,475 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:46,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:03:46,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:03:46,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:46,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:03:46,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:47,026 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 [2022-11-20 11:03:47,303 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 11:03:47,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 23 treesize of output 22 [2022-11-20 11:03:47,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:47,615 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 14 treesize of output 16 [2022-11-20 11:03:47,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:47,695 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 14 treesize of output 16 [2022-11-20 11:03:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:47,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:47,878 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2022-11-20 11:03:48,013 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int)) (v_ArrVal_521 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_521) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456)) is different from false [2022-11-20 11:03:48,025 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int)) (v_ArrVal_521 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_521) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456)) is different from false [2022-11-20 11:03:48,032 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int)) (v_ArrVal_521 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_521) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456)) is different from false [2022-11-20 11:03:48,756 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 11:03:48,756 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 2 case distinctions, treesize of input 32 treesize of output 38 [2022-11-20 11:03:48,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:03:48,769 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 64 treesize of output 62 [2022-11-20 11:03:48,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-20 11:03:48,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-20 11:03:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-20 11:03:49,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218400344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:49,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:49,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-11-20 11:03:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339374445] [2022-11-20 11:03:49,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:49,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:03:49,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:03:49,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1792, Unknown=19, NotChecked=356, Total=2352 [2022-11-20 11:03:49,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2022-11-20 11:03:49,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 170 transitions, 1191 flow. Second operand has 49 states, 49 states have (on average 72.46938775510205) internal successors, (3551), 49 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:49,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:49,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2022-11-20 11:03:49,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:53,271 INFO L130 PetriNetUnfolder]: 1245/3716 cut-off events. [2022-11-20 11:03:53,271 INFO L131 PetriNetUnfolder]: For 14577/14747 co-relation queries the response was YES. [2022-11-20 11:03:53,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12557 conditions, 3716 events. 1245/3716 cut-off events. For 14577/14747 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 33363 event pairs, 370 based on Foata normal form. 156/3723 useless extension candidates. Maximal degree in co-relation 12519. Up to 1060 conditions per place. [2022-11-20 11:03:53,304 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 93 selfloop transitions, 34 changer transitions 0/198 dead transitions. [2022-11-20 11:03:53,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 198 transitions, 1741 flow [2022-11-20 11:03:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:03:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 11:03:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1616 transitions. [2022-11-20 11:03:53,308 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5246753246753246 [2022-11-20 11:03:53,308 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1616 transitions. [2022-11-20 11:03:53,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1616 transitions. [2022-11-20 11:03:53,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:53,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1616 transitions. [2022-11-20 11:03:53,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 73.45454545454545) internal successors, (1616), 22 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:53,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:53,315 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:53,315 INFO L175 Difference]: Start difference. First operand has 215 places, 170 transitions, 1191 flow. Second operand 22 states and 1616 transitions. [2022-11-20 11:03:53,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 198 transitions, 1741 flow [2022-11-20 11:03:53,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 198 transitions, 1687 flow, removed 0 selfloop flow, removed 18 redundant places. [2022-11-20 11:03:53,338 INFO L231 Difference]: Finished difference. Result has 218 places, 169 transitions, 1201 flow [2022-11-20 11:03:53,338 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1201, PETRI_PLACES=218, PETRI_TRANSITIONS=169} [2022-11-20 11:03:53,338 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 100 predicate places. [2022-11-20 11:03:53,339 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 169 transitions, 1201 flow [2022-11-20 11:03:53,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 72.46938775510205) internal successors, (3551), 49 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:53,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:53,339 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] [2022-11-20 11:03:53,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-20 11:03:53,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 11:03:53,540 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:03:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:53,541 INFO L85 PathProgramCache]: Analyzing trace with hash 613350483, now seen corresponding path program 1 times [2022-11-20 11:03:53,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:53,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099842251] [2022-11-20 11:03:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:53,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:54,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:54,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099842251] [2022-11-20 11:03:54,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099842251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:54,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760028544] [2022-11-20 11:03:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:54,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:54,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:54,485 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:54,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:03:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 11:03:54,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:54,954 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 13 treesize of output 9 [2022-11-20 11:03:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:55,199 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 18 treesize of output 20 [2022-11-20 11:03:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:55,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:55,780 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_549 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_549) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 9223372039002259456))) is different from false [2022-11-20 11:03:55,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:03:55,890 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 26 treesize of output 27 [2022-11-20 11:03:55,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:03:55,899 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 42 treesize of output 38 [2022-11-20 11:03:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:56,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760028544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:56,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:56,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-11-20 11:03:56,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762387754] [2022-11-20 11:03:56,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:56,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 11:03:56,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:56,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 11:03:56,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1875, Unknown=21, NotChecked=88, Total=2162 [2022-11-20 11:03:56,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2022-11-20 11:03:56,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 169 transitions, 1201 flow. Second operand has 47 states, 47 states have (on average 72.76595744680851) internal successors, (3420), 47 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:56,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:56,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2022-11-20 11:03:56,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:00,394 INFO L130 PetriNetUnfolder]: 1582/4789 cut-off events. [2022-11-20 11:04:00,394 INFO L131 PetriNetUnfolder]: For 13107/13709 co-relation queries the response was YES. [2022-11-20 11:04:00,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15000 conditions, 4789 events. 1582/4789 cut-off events. For 13107/13709 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 44345 event pairs, 804 based on Foata normal form. 513/4962 useless extension candidates. Maximal degree in co-relation 14962. Up to 1837 conditions per place. [2022-11-20 11:04:00,441 INFO L137 encePairwiseOnDemand]: 117/140 looper letters, 114 selfloop transitions, 57 changer transitions 0/226 dead transitions. [2022-11-20 11:04:00,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 226 transitions, 1852 flow [2022-11-20 11:04:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:04:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-20 11:04:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1880 transitions. [2022-11-20 11:04:00,445 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2022-11-20 11:04:00,446 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1880 transitions. [2022-11-20 11:04:00,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1880 transitions. [2022-11-20 11:04:00,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:00,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1880 transitions. [2022-11-20 11:04:00,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 75.2) internal successors, (1880), 25 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:00,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 140.0) internal successors, (3640), 26 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:00,452 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 140.0) internal successors, (3640), 26 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:00,452 INFO L175 Difference]: Start difference. First operand has 218 places, 169 transitions, 1201 flow. Second operand 25 states and 1880 transitions. [2022-11-20 11:04:00,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 226 transitions, 1852 flow [2022-11-20 11:04:00,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 226 transitions, 1788 flow, removed 2 selfloop flow, removed 20 redundant places. [2022-11-20 11:04:00,485 INFO L231 Difference]: Finished difference. Result has 229 places, 185 transitions, 1452 flow [2022-11-20 11:04:00,485 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1452, PETRI_PLACES=229, PETRI_TRANSITIONS=185} [2022-11-20 11:04:00,485 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 111 predicate places. [2022-11-20 11:04:00,486 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 185 transitions, 1452 flow [2022-11-20 11:04:00,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 72.76595744680851) internal successors, (3420), 47 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:00,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:00,486 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] [2022-11-20 11:04:00,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-20 11:04:00,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 11:04:00,687 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:04:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:00,688 INFO L85 PathProgramCache]: Analyzing trace with hash 613350486, now seen corresponding path program 2 times [2022-11-20 11:04:00,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:00,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127955573] [2022-11-20 11:04:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:00,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:01,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127955573] [2022-11-20 11:04:01,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127955573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655156887] [2022-11-20 11:04:01,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:04:01,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:01,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:01,787 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:01,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:04:01,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:04:01,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:01,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:04:01,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:02,325 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 13 treesize of output 9 [2022-11-20 11:04:02,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:02,592 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 16 treesize of output 18 [2022-11-20 11:04:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:02,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:03,234 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_576 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_576) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967295)) is different from false [2022-11-20 11:04:03,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:03,266 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 24 treesize of output 25 [2022-11-20 11:04:03,275 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:03,276 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 38 treesize of output 34 [2022-11-20 11:04:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-20 11:04:03,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655156887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:03,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:03,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-11-20 11:04:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572996451] [2022-11-20 11:04:03,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:03,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 11:04:03,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:03,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 11:04:03,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1886, Unknown=15, NotChecked=88, Total=2162 [2022-11-20 11:04:03,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2022-11-20 11:04:03,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 185 transitions, 1452 flow. Second operand has 47 states, 47 states have (on average 72.76595744680851) internal successors, (3420), 47 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:03,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:03,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2022-11-20 11:04:03,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:07,476 INFO L130 PetriNetUnfolder]: 1575/4691 cut-off events. [2022-11-20 11:04:07,476 INFO L131 PetriNetUnfolder]: For 14283/14886 co-relation queries the response was YES. [2022-11-20 11:04:07,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14865 conditions, 4691 events. 1575/4691 cut-off events. For 14283/14886 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 43131 event pairs, 832 based on Foata normal form. 516/4865 useless extension candidates. Maximal degree in co-relation 14821. Up to 1886 conditions per place. [2022-11-20 11:04:07,527 INFO L137 encePairwiseOnDemand]: 116/140 looper letters, 117 selfloop transitions, 57 changer transitions 0/229 dead transitions. [2022-11-20 11:04:07,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 229 transitions, 1958 flow [2022-11-20 11:04:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 11:04:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-20 11:04:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2096 transitions. [2022-11-20 11:04:07,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2022-11-20 11:04:07,535 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2096 transitions. [2022-11-20 11:04:07,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2096 transitions. [2022-11-20 11:04:07,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:07,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2096 transitions. [2022-11-20 11:04:07,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 74.85714285714286) internal successors, (2096), 28 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:07,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 140.0) internal successors, (4060), 29 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:07,546 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 140.0) internal successors, (4060), 29 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:07,546 INFO L175 Difference]: Start difference. First operand has 229 places, 185 transitions, 1452 flow. Second operand 28 states and 2096 transitions. [2022-11-20 11:04:07,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 229 transitions, 1958 flow [2022-11-20 11:04:07,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 229 transitions, 1832 flow, removed 11 selfloop flow, removed 16 redundant places. [2022-11-20 11:04:07,586 INFO L231 Difference]: Finished difference. Result has 240 places, 183 transitions, 1416 flow [2022-11-20 11:04:07,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1416, PETRI_PLACES=240, PETRI_TRANSITIONS=183} [2022-11-20 11:04:07,587 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 122 predicate places. [2022-11-20 11:04:07,587 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 183 transitions, 1416 flow [2022-11-20 11:04:07,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 72.76595744680851) internal successors, (3420), 47 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:07,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:07,589 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] [2022-11-20 11:04:07,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:07,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:07,796 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:04:07,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:07,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1019318746, now seen corresponding path program 1 times [2022-11-20 11:04:07,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:07,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707668353] [2022-11-20 11:04:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:07,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:04:07,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:07,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707668353] [2022-11-20 11:04:07,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707668353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:07,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823939940] [2022-11-20 11:04:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:07,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:07,915 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:07,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 11:04:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:08,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:04:08,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:04:08,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:04:08,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823939940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:08,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:08,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 11:04:08,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271846426] [2022-11-20 11:04:08,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:08,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:04:08,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:04:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:04:08,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 140 [2022-11-20 11:04:08,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 183 transitions, 1416 flow. Second operand has 12 states, 12 states have (on average 107.66666666666667) internal successors, (1292), 12 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:08,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:08,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 140 [2022-11-20 11:04:08,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:09,953 INFO L130 PetriNetUnfolder]: 1333/4807 cut-off events. [2022-11-20 11:04:09,954 INFO L131 PetriNetUnfolder]: For 16837/17747 co-relation queries the response was YES. [2022-11-20 11:04:09,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16385 conditions, 4807 events. 1333/4807 cut-off events. For 16837/17747 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 48536 event pairs, 195 based on Foata normal form. 802/5347 useless extension candidates. Maximal degree in co-relation 16342. Up to 857 conditions per place. [2022-11-20 11:04:09,995 INFO L137 encePairwiseOnDemand]: 133/140 looper letters, 169 selfloop transitions, 43 changer transitions 0/339 dead transitions. [2022-11-20 11:04:09,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 339 transitions, 3146 flow [2022-11-20 11:04:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:04:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:04:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2021 transitions. [2022-11-20 11:04:09,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.801984126984127 [2022-11-20 11:04:09,999 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2021 transitions. [2022-11-20 11:04:09,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2021 transitions. [2022-11-20 11:04:10,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:10,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2021 transitions. [2022-11-20 11:04:10,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 112.27777777777777) internal successors, (2021), 18 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:10,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:10,007 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:10,007 INFO L175 Difference]: Start difference. First operand has 240 places, 183 transitions, 1416 flow. Second operand 18 states and 2021 transitions. [2022-11-20 11:04:10,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 339 transitions, 3146 flow [2022-11-20 11:04:10,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 339 transitions, 3028 flow, removed 3 selfloop flow, removed 23 redundant places. [2022-11-20 11:04:10,064 INFO L231 Difference]: Finished difference. Result has 238 places, 209 transitions, 1802 flow [2022-11-20 11:04:10,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1802, PETRI_PLACES=238, PETRI_TRANSITIONS=209} [2022-11-20 11:04:10,065 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 120 predicate places. [2022-11-20 11:04:10,065 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 209 transitions, 1802 flow [2022-11-20 11:04:10,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 107.66666666666667) internal successors, (1292), 12 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:10,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:10,066 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:04:10,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:10,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:04:10,272 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:04:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:10,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1534110662, now seen corresponding path program 1 times [2022-11-20 11:04:10,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:10,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205403749] [2022-11-20 11:04:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:10,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:04:10,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:10,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205403749] [2022-11-20 11:04:10,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205403749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:10,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906120709] [2022-11-20 11:04:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:10,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:10,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:10,388 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:10,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 11:04:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:04:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:04:10,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:04:10,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906120709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:04:10,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:04:10,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 11:04:10,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793807896] [2022-11-20 11:04:10,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:04:10,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:04:10,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:04:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:04:10,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 140 [2022-11-20 11:04:10,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 209 transitions, 1802 flow. Second operand has 6 states, 6 states have (on average 107.33333333333333) internal successors, (644), 6 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:10,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:10,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 140 [2022-11-20 11:04:10,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:11,966 INFO L130 PetriNetUnfolder]: 1207/4321 cut-off events. [2022-11-20 11:04:11,966 INFO L131 PetriNetUnfolder]: For 17675/18445 co-relation queries the response was YES. [2022-11-20 11:04:11,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15840 conditions, 4321 events. 1207/4321 cut-off events. For 17675/18445 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 42776 event pairs, 122 based on Foata normal form. 796/4883 useless extension candidates. Maximal degree in co-relation 15795. Up to 1137 conditions per place. [2022-11-20 11:04:11,998 INFO L137 encePairwiseOnDemand]: 135/140 looper letters, 87 selfloop transitions, 21 changer transitions 0/235 dead transitions. [2022-11-20 11:04:11,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 235 transitions, 2145 flow [2022-11-20 11:04:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:04:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:04:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 784 transitions. [2022-11-20 11:04:12,001 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-11-20 11:04:12,001 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 784 transitions. [2022-11-20 11:04:12,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 784 transitions. [2022-11-20 11:04:12,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:12,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 784 transitions. [2022-11-20 11:04:12,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:12,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:12,004 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:12,004 INFO L175 Difference]: Start difference. First operand has 238 places, 209 transitions, 1802 flow. Second operand 7 states and 784 transitions. [2022-11-20 11:04:12,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 235 transitions, 2145 flow [2022-11-20 11:04:12,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 235 transitions, 2047 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-11-20 11:04:12,050 INFO L231 Difference]: Finished difference. Result has 234 places, 205 transitions, 1719 flow [2022-11-20 11:04:12,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1719, PETRI_PLACES=234, PETRI_TRANSITIONS=205} [2022-11-20 11:04:12,050 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 116 predicate places. [2022-11-20 11:04:12,051 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 205 transitions, 1719 flow [2022-11-20 11:04:12,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 107.33333333333333) internal successors, (644), 6 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:12,051 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:12,051 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] [2022-11-20 11:04:12,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:12,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 11:04:12,259 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:04:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash 367400846, now seen corresponding path program 2 times [2022-11-20 11:04:12,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:12,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772875768] [2022-11-20 11:04:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:12,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:12,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772875768] [2022-11-20 11:04:12,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772875768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:12,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821205961] [2022-11-20 11:04:12,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:04:12,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:12,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:12,467 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:12,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 11:04:12,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:04:12,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:04:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 11:04:12,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 11:04:13,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821205961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:13,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:13,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-20 11:04:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348434697] [2022-11-20 11:04:13,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:13,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:04:13,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:04:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:04:13,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 140 [2022-11-20 11:04:13,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 205 transitions, 1719 flow. Second operand has 18 states, 18 states have (on average 92.61111111111111) internal successors, (1667), 18 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:13,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:13,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 140 [2022-11-20 11:04:13,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:16,013 INFO L130 PetriNetUnfolder]: 1781/8353 cut-off events. [2022-11-20 11:04:16,014 INFO L131 PetriNetUnfolder]: For 27335/27406 co-relation queries the response was YES. [2022-11-20 11:04:16,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26833 conditions, 8353 events. 1781/8353 cut-off events. For 27335/27406 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 89449 event pairs, 1241 based on Foata normal form. 3/8113 useless extension candidates. Maximal degree in co-relation 26789. Up to 775 conditions per place. [2022-11-20 11:04:16,089 INFO L137 encePairwiseOnDemand]: 129/140 looper letters, 145 selfloop transitions, 25 changer transitions 0/307 dead transitions. [2022-11-20 11:04:16,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 307 transitions, 2808 flow [2022-11-20 11:04:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:04:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 11:04:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2263 transitions. [2022-11-20 11:04:16,093 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6735119047619048 [2022-11-20 11:04:16,093 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2263 transitions. [2022-11-20 11:04:16,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2263 transitions. [2022-11-20 11:04:16,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:16,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2263 transitions. [2022-11-20 11:04:16,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 94.29166666666667) internal successors, (2263), 24 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:16,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:16,102 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:16,102 INFO L175 Difference]: Start difference. First operand has 234 places, 205 transitions, 1719 flow. Second operand 24 states and 2263 transitions. [2022-11-20 11:04:16,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 307 transitions, 2808 flow [2022-11-20 11:04:16,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 307 transitions, 2767 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-20 11:04:16,195 INFO L231 Difference]: Finished difference. Result has 248 places, 209 transitions, 1755 flow [2022-11-20 11:04:16,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1755, PETRI_PLACES=248, PETRI_TRANSITIONS=209} [2022-11-20 11:04:16,196 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 130 predicate places. [2022-11-20 11:04:16,196 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 209 transitions, 1755 flow [2022-11-20 11:04:16,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 92.61111111111111) internal successors, (1667), 18 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:16,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:16,197 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] [2022-11-20 11:04:16,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:16,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:04:16,404 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:04:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash -950300157, now seen corresponding path program 1 times [2022-11-20 11:04:16,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994534869] [2022-11-20 11:04:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:16,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:17,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:17,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994534869] [2022-11-20 11:04:17,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994534869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:17,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576437105] [2022-11-20 11:04:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:17,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:17,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:17,708 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:17,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 11:04:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 11:04:17,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:17,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 11:04:17,939 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:04:17,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2022-11-20 11:04:18,161 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:04:18,161 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 15 treesize of output 15 [2022-11-20 11:04:18,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:04:18,829 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 16 treesize of output 18 [2022-11-20 11:04:19,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:19,051 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 16 treesize of output 18 [2022-11-20 11:04:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:19,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:19,318 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_690 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_690) c_~A~0.base) (+ (* 4 |c_thread1Thread1of1ForFork1_#t~post1#1|) c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-20 11:04:19,675 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_689 (Array Int Int)) (v_ArrVal_690 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_689) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_690) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 4294967295)) is different from false [2022-11-20 11:04:19,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:19,970 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 27 treesize of output 28 [2022-11-20 11:04:19,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:19,981 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 72 treesize of output 68 [2022-11-20 11:04:19,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-20 11:04:19,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 11:04:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:20,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576437105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:20,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:20,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2022-11-20 11:04:20,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503756512] [2022-11-20 11:04:20,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 11:04:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 11:04:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2436, Unknown=36, NotChecked=202, Total=2862 [2022-11-20 11:04:20,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 140 [2022-11-20 11:04:20,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 209 transitions, 1755 flow. Second operand has 54 states, 54 states have (on average 67.5925925925926) internal successors, (3650), 54 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:20,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:20,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 140 [2022-11-20 11:04:20,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:34,428 INFO L130 PetriNetUnfolder]: 8643/22685 cut-off events. [2022-11-20 11:04:34,429 INFO L131 PetriNetUnfolder]: For 68523/72131 co-relation queries the response was YES. [2022-11-20 11:04:34,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74883 conditions, 22685 events. 8643/22685 cut-off events. For 68523/72131 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 247800 event pairs, 2850 based on Foata normal form. 3378/25166 useless extension candidates. Maximal degree in co-relation 74842. Up to 6196 conditions per place. [2022-11-20 11:04:34,681 INFO L137 encePairwiseOnDemand]: 110/140 looper letters, 299 selfloop transitions, 97 changer transitions 0/448 dead transitions. [2022-11-20 11:04:34,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 448 transitions, 4064 flow [2022-11-20 11:04:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 11:04:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-20 11:04:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2752 transitions. [2022-11-20 11:04:34,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5172932330827068 [2022-11-20 11:04:34,689 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2752 transitions. [2022-11-20 11:04:34,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2752 transitions. [2022-11-20 11:04:34,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:34,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2752 transitions. [2022-11-20 11:04:34,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 72.42105263157895) internal successors, (2752), 38 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:34,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 140.0) internal successors, (5460), 39 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:34,709 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 140.0) internal successors, (5460), 39 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:34,710 INFO L175 Difference]: Start difference. First operand has 248 places, 209 transitions, 1755 flow. Second operand 38 states and 2752 transitions. [2022-11-20 11:04:34,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 448 transitions, 4064 flow [2022-11-20 11:04:34,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 448 transitions, 4010 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-20 11:04:34,929 INFO L231 Difference]: Finished difference. Result has 280 places, 240 transitions, 2484 flow [2022-11-20 11:04:34,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2484, PETRI_PLACES=280, PETRI_TRANSITIONS=240} [2022-11-20 11:04:34,929 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 162 predicate places. [2022-11-20 11:04:34,930 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 240 transitions, 2484 flow [2022-11-20 11:04:34,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 67.5925925925926) internal successors, (3650), 54 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:34,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:34,931 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] [2022-11-20 11:04:34,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:35,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:35,132 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:04:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1752022912, now seen corresponding path program 1 times [2022-11-20 11:04:35,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:35,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398340976] [2022-11-20 11:04:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:35,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:36,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398340976] [2022-11-20 11:04:36,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398340976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898250793] [2022-11-20 11:04:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:36,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:36,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:36,504 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:36,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 11:04:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:36,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 11:04:36,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:36,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 11:04:36,852 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:04:36,852 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 11 treesize of output 11 [2022-11-20 11:04:37,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:04:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:37,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 11:04:37,794 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 16 treesize of output 18 [2022-11-20 11:04:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:37,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:37,980 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_723 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_723) c_~A~0.base) (+ (* 4 |c_thread1Thread1of1ForFork1_#t~post1#1|) c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-20 11:04:38,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:38,663 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 29 treesize of output 30 [2022-11-20 11:04:38,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:38,676 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 80 treesize of output 76 [2022-11-20 11:04:38,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2022-11-20 11:04:38,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-20 11:04:39,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:04:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:39,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898250793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:39,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:39,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 48 [2022-11-20 11:04:39,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394204322] [2022-11-20 11:04:39,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:39,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:04:39,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:39,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:04:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2041, Unknown=30, NotChecked=92, Total=2352 [2022-11-20 11:04:39,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 140 [2022-11-20 11:04:39,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 240 transitions, 2484 flow. Second operand has 49 states, 49 states have (on average 67.6734693877551) internal successors, (3316), 49 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:39,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:39,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 140 [2022-11-20 11:04:39,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:49,749 INFO L130 PetriNetUnfolder]: 8731/22911 cut-off events. [2022-11-20 11:04:49,750 INFO L131 PetriNetUnfolder]: For 112201/116542 co-relation queries the response was YES. [2022-11-20 11:04:49,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87770 conditions, 22911 events. 8731/22911 cut-off events. For 112201/116542 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 250304 event pairs, 3325 based on Foata normal form. 3353/25204 useless extension candidates. Maximal degree in co-relation 87717. Up to 6096 conditions per place. [2022-11-20 11:04:50,203 INFO L137 encePairwiseOnDemand]: 115/140 looper letters, 220 selfloop transitions, 92 changer transitions 0/364 dead transitions. [2022-11-20 11:04:50,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 364 transitions, 3954 flow [2022-11-20 11:04:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:04:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-20 11:04:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2067 transitions. [2022-11-20 11:04:50,208 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5091133004926108 [2022-11-20 11:04:50,208 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2067 transitions. [2022-11-20 11:04:50,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2067 transitions. [2022-11-20 11:04:50,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:50,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2067 transitions. [2022-11-20 11:04:50,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 71.27586206896552) internal successors, (2067), 29 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:50,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 140.0) internal successors, (4200), 30 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:50,216 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 140.0) internal successors, (4200), 30 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:50,216 INFO L175 Difference]: Start difference. First operand has 280 places, 240 transitions, 2484 flow. Second operand 29 states and 2067 transitions. [2022-11-20 11:04:50,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 364 transitions, 3954 flow [2022-11-20 11:04:50,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 364 transitions, 3840 flow, removed 8 selfloop flow, removed 19 redundant places. [2022-11-20 11:04:50,655 INFO L231 Difference]: Finished difference. Result has 293 places, 249 transitions, 2793 flow [2022-11-20 11:04:50,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2793, PETRI_PLACES=293, PETRI_TRANSITIONS=249} [2022-11-20 11:04:50,656 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 175 predicate places. [2022-11-20 11:04:50,656 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 249 transitions, 2793 flow [2022-11-20 11:04:50,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 67.6734693877551) internal successors, (3316), 49 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:50,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:50,657 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] [2022-11-20 11:04:50,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:50,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-20 11:04:50,858 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:04:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1806471626, now seen corresponding path program 2 times [2022-11-20 11:04:50,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:50,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993696750] [2022-11-20 11:04:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:50,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:52,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:52,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993696750] [2022-11-20 11:04:52,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993696750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:52,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049960852] [2022-11-20 11:04:52,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:04:52,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:52,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:52,179 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:52,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 11:04:52,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:04:52,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:52,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 11:04:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:52,929 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 13 treesize of output 9 [2022-11-20 11:04:53,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:53,373 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 18 treesize of output 20 [2022-11-20 11:04:53,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:53,543 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 18 treesize of output 20 [2022-11-20 11:04:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:53,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:53,889 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_755) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-20 11:04:53,916 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_755) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-20 11:04:53,932 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int)) (v_ArrVal_754 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_755) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-20 11:04:54,813 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int)) (v_ArrVal_754 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_755) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-11-20 11:04:54,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:54,851 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 29 treesize of output 30 [2022-11-20 11:04:54,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:54,863 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 158 treesize of output 148 [2022-11-20 11:04:54,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 118 [2022-11-20 11:04:54,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2022-11-20 11:04:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-11-20 11:04:55,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049960852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:55,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:55,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-11-20 11:04:55,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549764625] [2022-11-20 11:04:55,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:55,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:04:55,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:55,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:04:55,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2164, Unknown=27, NotChecked=388, Total=2756 [2022-11-20 11:04:55,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 140 [2022-11-20 11:04:55,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 249 transitions, 2793 flow. Second operand has 53 states, 53 states have (on average 67.62264150943396) internal successors, (3584), 53 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:55,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:55,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 140 [2022-11-20 11:04:55,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:07,257 INFO L130 PetriNetUnfolder]: 8724/22960 cut-off events. [2022-11-20 11:05:07,257 INFO L131 PetriNetUnfolder]: For 119433/123672 co-relation queries the response was YES. [2022-11-20 11:05:07,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88298 conditions, 22960 events. 8724/22960 cut-off events. For 119433/123672 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 251434 event pairs, 3052 based on Foata normal form. 3346/25229 useless extension candidates. Maximal degree in co-relation 88242. Up to 6096 conditions per place. [2022-11-20 11:05:07,511 INFO L137 encePairwiseOnDemand]: 115/140 looper letters, 202 selfloop transitions, 92 changer transitions 0/346 dead transitions. [2022-11-20 11:05:07,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 346 transitions, 3934 flow [2022-11-20 11:05:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:05:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-20 11:05:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1923 transitions. [2022-11-20 11:05:07,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5087301587301587 [2022-11-20 11:05:07,515 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1923 transitions. [2022-11-20 11:05:07,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1923 transitions. [2022-11-20 11:05:07,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:07,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1923 transitions. [2022-11-20 11:05:07,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 71.22222222222223) internal successors, (1923), 27 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 140.0) internal successors, (3920), 28 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,521 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 140.0) internal successors, (3920), 28 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,521 INFO L175 Difference]: Start difference. First operand has 293 places, 249 transitions, 2793 flow. Second operand 27 states and 1923 transitions. [2022-11-20 11:05:07,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 346 transitions, 3934 flow [2022-11-20 11:05:08,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 346 transitions, 3810 flow, removed 15 selfloop flow, removed 19 redundant places. [2022-11-20 11:05:08,217 INFO L231 Difference]: Finished difference. Result has 300 places, 248 transitions, 2836 flow [2022-11-20 11:05:08,217 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2836, PETRI_PLACES=300, PETRI_TRANSITIONS=248} [2022-11-20 11:05:08,218 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 182 predicate places. [2022-11-20 11:05:08,218 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 248 transitions, 2836 flow [2022-11-20 11:05:08,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 67.62264150943396) internal successors, (3584), 53 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:08,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:08,219 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] [2022-11-20 11:05:08,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-20 11:05:08,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 11:05:08,426 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:05:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash -396368339, now seen corresponding path program 2 times [2022-11-20 11:05:08,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:08,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291945910] [2022-11-20 11:05:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:08,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:09,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:09,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291945910] [2022-11-20 11:05:09,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291945910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:09,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138929824] [2022-11-20 11:05:09,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:09,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:09,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:09,708 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:09,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 11:05:09,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:05:09,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:09,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 11:05:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:10,389 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 13 treesize of output 9 [2022-11-20 11:05:10,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:10,727 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 16 treesize of output 18 [2022-11-20 11:05:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:10,817 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 16 treesize of output 18 [2022-11-20 11:05:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:11,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:11,270 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_787) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-20 11:05:11,295 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int)) (v_ArrVal_786 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_786) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_787) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-20 11:05:11,645 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int)) (v_ArrVal_786 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_786) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_787) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967295)) is different from false [2022-11-20 11:05:11,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:11,787 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 27 treesize of output 28 [2022-11-20 11:05:11,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:11,798 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 72 treesize of output 68 [2022-11-20 11:05:11,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-20 11:05:11,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 11:05:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-20 11:05:12,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138929824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:12,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:12,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-11-20 11:05:12,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146910754] [2022-11-20 11:05:12,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:12,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:05:12,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:05:12,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2239, Unknown=24, NotChecked=294, Total=2756 [2022-11-20 11:05:12,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 140 [2022-11-20 11:05:12,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 248 transitions, 2836 flow. Second operand has 53 states, 53 states have (on average 67.62264150943396) internal successors, (3584), 53 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:12,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:12,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 140 [2022-11-20 11:05:12,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:24,069 INFO L130 PetriNetUnfolder]: 8770/23083 cut-off events. [2022-11-20 11:05:24,069 INFO L131 PetriNetUnfolder]: For 119300/123595 co-relation queries the response was YES. [2022-11-20 11:05:24,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88386 conditions, 23083 events. 8770/23083 cut-off events. For 119300/123595 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 252596 event pairs, 3318 based on Foata normal form. 3312/25216 useless extension candidates. Maximal degree in co-relation 88330. Up to 6196 conditions per place. [2022-11-20 11:05:24,510 INFO L137 encePairwiseOnDemand]: 116/140 looper letters, 197 selfloop transitions, 92 changer transitions 0/341 dead transitions. [2022-11-20 11:05:24,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 341 transitions, 3934 flow [2022-11-20 11:05:24,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:05:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-20 11:05:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1857 transitions. [2022-11-20 11:05:24,514 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5101648351648351 [2022-11-20 11:05:24,514 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1857 transitions. [2022-11-20 11:05:24,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1857 transitions. [2022-11-20 11:05:24,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:24,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1857 transitions. [2022-11-20 11:05:24,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 71.42307692307692) internal successors, (1857), 26 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:24,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 140.0) internal successors, (3780), 27 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:24,524 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 140.0) internal successors, (3780), 27 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:24,524 INFO L175 Difference]: Start difference. First operand has 300 places, 248 transitions, 2836 flow. Second operand 26 states and 1857 transitions. [2022-11-20 11:05:24,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 341 transitions, 3934 flow [2022-11-20 11:05:24,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 341 transitions, 3784 flow, removed 2 selfloop flow, removed 27 redundant places. [2022-11-20 11:05:24,852 INFO L231 Difference]: Finished difference. Result has 298 places, 247 transitions, 2853 flow [2022-11-20 11:05:24,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2853, PETRI_PLACES=298, PETRI_TRANSITIONS=247} [2022-11-20 11:05:24,853 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 180 predicate places. [2022-11-20 11:05:24,853 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 247 transitions, 2853 flow [2022-11-20 11:05:24,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 67.62264150943396) internal successors, (3584), 53 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:24,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:24,853 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] [2022-11-20 11:05:24,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:25,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:25,054 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:05:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:25,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1311027655, now seen corresponding path program 1 times [2022-11-20 11:05:25,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:25,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069333488] [2022-11-20 11:05:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:25,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:26,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:26,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069333488] [2022-11-20 11:05:26,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069333488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:26,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553076978] [2022-11-20 11:05:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:26,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:26,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:26,079 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:26,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 11:05:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 11:05:26,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:26,734 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 13 treesize of output 9 [2022-11-20 11:05:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:27,150 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 18 treesize of output 20 [2022-11-20 11:05:27,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:27,232 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 18 treesize of output 20 [2022-11-20 11:05:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:27,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:27,678 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_819 (Array Int Int))) (<= 0 (+ 4294967295 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_819) c_~A~0.base) (+ c_~A~0.offset 4))))) is different from false [2022-11-20 11:05:27,702 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int)) (v_ArrVal_819 (Array Int Int))) (<= 0 (+ 4294967295 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_818) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_819) c_~A~0.base) (+ c_~A~0.offset 4))))) is different from false [2022-11-20 11:05:27,849 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int)) (v_ArrVal_819 (Array Int Int))) (<= 0 (+ 4294967295 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_818) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_819) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4))))) is different from false [2022-11-20 11:05:27,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:27,997 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 29 treesize of output 30 [2022-11-20 11:05:28,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:28,012 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 158 treesize of output 148 [2022-11-20 11:05:28,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 126 [2022-11-20 11:05:28,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 110 [2022-11-20 11:05:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:28,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553076978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:28,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:28,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-11-20 11:05:28,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021532020] [2022-11-20 11:05:28,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:28,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:05:28,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:28,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:05:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2241, Unknown=20, NotChecked=294, Total=2756 [2022-11-20 11:05:28,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 140 [2022-11-20 11:05:28,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 247 transitions, 2853 flow. Second operand has 53 states, 53 states have (on average 67.67924528301887) internal successors, (3587), 53 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:28,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:28,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 140 [2022-11-20 11:05:28,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:41,300 INFO L130 PetriNetUnfolder]: 11391/25089 cut-off events. [2022-11-20 11:05:41,300 INFO L131 PetriNetUnfolder]: For 277124/280811 co-relation queries the response was YES. [2022-11-20 11:05:41,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114136 conditions, 25089 events. 11391/25089 cut-off events. For 277124/280811 co-relation queries the response was YES. Maximal size of possible extension queue 1078. Compared 280529 event pairs, 3256 based on Foata normal form. 2131/25951 useless extension candidates. Maximal degree in co-relation 114083. Up to 6248 conditions per place. [2022-11-20 11:05:41,649 INFO L137 encePairwiseOnDemand]: 117/140 looper letters, 250 selfloop transitions, 37 changer transitions 0/398 dead transitions. [2022-11-20 11:05:41,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 398 transitions, 5517 flow [2022-11-20 11:05:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:05:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-20 11:05:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1853 transitions. [2022-11-20 11:05:41,654 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.509065934065934 [2022-11-20 11:05:41,654 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1853 transitions. [2022-11-20 11:05:41,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1853 transitions. [2022-11-20 11:05:41,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:41,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1853 transitions. [2022-11-20 11:05:41,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 71.26923076923077) internal successors, (1853), 26 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:41,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 140.0) internal successors, (3780), 27 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:41,661 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 140.0) internal successors, (3780), 27 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:41,662 INFO L175 Difference]: Start difference. First operand has 298 places, 247 transitions, 2853 flow. Second operand 26 states and 1853 transitions. [2022-11-20 11:05:41,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 398 transitions, 5517 flow [2022-11-20 11:05:41,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 398 transitions, 5338 flow, removed 7 selfloop flow, removed 24 redundant places. [2022-11-20 11:05:41,962 INFO L231 Difference]: Finished difference. Result has 303 places, 261 transitions, 2937 flow [2022-11-20 11:05:41,963 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2937, PETRI_PLACES=303, PETRI_TRANSITIONS=261} [2022-11-20 11:05:41,963 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 185 predicate places. [2022-11-20 11:05:41,963 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 261 transitions, 2937 flow [2022-11-20 11:05:41,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 67.67924528301887) internal successors, (3587), 53 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:41,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:41,965 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] [2022-11-20 11:05:41,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:42,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 11:05:42,166 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:05:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:42,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1311027652, now seen corresponding path program 2 times [2022-11-20 11:05:42,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:42,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951476519] [2022-11-20 11:05:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:42,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:43,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:43,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951476519] [2022-11-20 11:05:43,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951476519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:43,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853271679] [2022-11-20 11:05:43,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:43,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:43,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:43,138 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:43,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 11:05:43,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:05:43,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:43,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 11:05:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:43,772 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 13 treesize of output 9 [2022-11-20 11:05:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:44,074 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 16 treesize of output 18 [2022-11-20 11:05:44,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:44,150 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 16 treesize of output 18 [2022-11-20 11:05:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:44,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:45,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:45,201 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 27 treesize of output 28 [2022-11-20 11:05:45,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:45,214 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 72 treesize of output 68 [2022-11-20 11:05:45,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-20 11:05:45,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 11:05:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:45,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853271679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:45,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:45,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-20 11:05:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885206755] [2022-11-20 11:05:45,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:45,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 11:05:45,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:45,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 11:05:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2408, Unknown=40, NotChecked=0, Total=2652 [2022-11-20 11:05:45,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 140 [2022-11-20 11:05:45,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 261 transitions, 2937 flow. Second operand has 52 states, 52 states have (on average 70.61538461538461) internal successors, (3672), 52 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:45,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:45,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 140 [2022-11-20 11:05:45,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:57,986 INFO L130 PetriNetUnfolder]: 11687/27126 cut-off events. [2022-11-20 11:05:57,986 INFO L131 PetriNetUnfolder]: For 310899/314116 co-relation queries the response was YES. [2022-11-20 11:05:58,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125069 conditions, 27126 events. 11687/27126 cut-off events. For 310899/314116 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 303366 event pairs, 3721 based on Foata normal form. 1565/26646 useless extension candidates. Maximal degree in co-relation 125013. Up to 6248 conditions per place. [2022-11-20 11:05:58,577 INFO L137 encePairwiseOnDemand]: 115/140 looper letters, 243 selfloop transitions, 40 changer transitions 0/397 dead transitions. [2022-11-20 11:05:58,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 397 transitions, 5437 flow [2022-11-20 11:05:58,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:05:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-20 11:05:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1997 transitions. [2022-11-20 11:05:58,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5283068783068783 [2022-11-20 11:05:58,583 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1997 transitions. [2022-11-20 11:05:58,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1997 transitions. [2022-11-20 11:05:58,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:58,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1997 transitions. [2022-11-20 11:05:58,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.96296296296296) internal successors, (1997), 27 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:58,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 140.0) internal successors, (3920), 28 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:58,596 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 140.0) internal successors, (3920), 28 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:58,597 INFO L175 Difference]: Start difference. First operand has 303 places, 261 transitions, 2937 flow. Second operand 27 states and 1997 transitions. [2022-11-20 11:05:58,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 397 transitions, 5437 flow [2022-11-20 11:05:59,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 397 transitions, 5401 flow, removed 2 selfloop flow, removed 16 redundant places. [2022-11-20 11:05:59,130 INFO L231 Difference]: Finished difference. Result has 314 places, 261 transitions, 2992 flow [2022-11-20 11:05:59,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2882, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2992, PETRI_PLACES=314, PETRI_TRANSITIONS=261} [2022-11-20 11:05:59,131 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 196 predicate places. [2022-11-20 11:05:59,131 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 261 transitions, 2992 flow [2022-11-20 11:05:59,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 70.61538461538461) internal successors, (3672), 52 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:59,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:59,132 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:59,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:59,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b425560-1348-46bf-8b93-268820b465b3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:59,333 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 11:05:59,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:59,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1069952021, now seen corresponding path program 3 times [2022-11-20 11:05:59,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:59,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860187633] [2022-11-20 11:05:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:59,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat