./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5237d83 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_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a --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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- 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-b5237d8 [2022-11-21 17:05:03,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:05:03,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:05:03,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:05:03,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:05:03,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:05:03,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:05:03,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:05:03,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:05:03,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:05:03,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:05:03,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:05:03,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:05:03,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:05:03,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:05:03,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:05:03,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:05:03,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:05:03,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:05:03,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:05:03,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:05:03,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:05:03,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:05:03,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:05:03,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:05:03,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:05:03,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:05:03,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:05:03,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:05:03,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:05:03,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:05:03,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:05:03,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:05:03,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:05:03,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:05:03,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:05:03,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:05:03,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:05:03,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:05:03,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:05:03,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:05:03,396 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-21 17:05:03,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:05:03,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:05:03,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:05:03,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:05:03,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:05:03,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:05:03,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:05:03,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:05:03,426 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:05:03,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:05:03,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:05:03,427 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 17:05:03,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:05:03,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:05:03,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:05:03,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:05:03,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:05:03,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:05:03,429 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-21 17:05:03,429 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:05:03,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:05:03,430 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:05:03,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:05:03,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:05:03,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:05:03,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:05:03,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:05:03,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:05:03,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:05:03,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:05:03,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:05:03,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:05:03,433 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:05:03,433 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:05:03,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:05:03,433 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_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-11-21 17:05:03,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:05:03,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:05:03,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:05:03,796 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:05:03,797 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:05:03,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-11-21 17:05:06,821 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:05:07,065 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:05:07,066 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-11-21 17:05:07,073 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/data/5129505ab/5374742ed48a48789c7ccf4280064638/FLAG94f67a7a8 [2022-11-21 17:05:07,093 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/data/5129505ab/5374742ed48a48789c7ccf4280064638 [2022-11-21 17:05:07,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:05:07,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:05:07,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:05:07,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:05:07,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:05:07,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d36b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07, skipping insertion in model container [2022-11-21 17:05:07,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:05:07,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:05:07,299 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_f232a7c3-50ae-4731-b678-72a2abbae78f/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-11-21 17:05:07,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:05:07,320 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:05:07,342 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_f232a7c3-50ae-4731-b678-72a2abbae78f/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-11-21 17:05:07,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:05:07,363 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:05:07,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07 WrapperNode [2022-11-21 17:05:07,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:05:07,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:05:07,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:05:07,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:05:07,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,416 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 178 [2022-11-21 17:05:07,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:05:07,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:05:07,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:05:07,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:05:07,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,470 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:05:07,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:05:07,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:05:07,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:05:07,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (1/1) ... [2022-11-21 17:05:07,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:05:07,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:07,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:05:07,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:05:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:05:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:05:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:05:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:05:07,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 17:05:07,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 17:05:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 17:05:07,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 17:05:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:05:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 17:05:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 17:05:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 17:05:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:05:07,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:05:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:05:07,569 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 17:05:07,673 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:05:07,675 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:05:08,056 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:05:08,480 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:05:08,480 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 17:05:08,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:05:08 BoogieIcfgContainer [2022-11-21 17:05:08,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:05:08,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:05:08,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:05:08,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:05:08,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:05:07" (1/3) ... [2022-11-21 17:05:08,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7222c7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:05:08, skipping insertion in model container [2022-11-21 17:05:08,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:05:07" (2/3) ... [2022-11-21 17:05:08,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7222c7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:05:08, skipping insertion in model container [2022-11-21 17:05:08,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:05:08" (3/3) ... [2022-11-21 17:05:08,492 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-11-21 17:05:08,501 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 17:05:08,512 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:05:08,513 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-21 17:05:08,513 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 17:05:08,672 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 17:05:08,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 300 flow [2022-11-21 17:05:08,845 INFO L130 PetriNetUnfolder]: 9/140 cut-off events. [2022-11-21 17:05:08,846 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 17:05:08,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 9/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 176 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2022-11-21 17:05:08,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 142 transitions, 300 flow [2022-11-21 17:05:08,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 121 transitions, 251 flow [2022-11-21 17:05:08,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:05:08,887 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;@48978447, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:05:08,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-11-21 17:05:08,912 INFO L130 PetriNetUnfolder]: 3/56 cut-off events. [2022-11-21 17:05:08,913 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 17:05:08,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:08,914 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] [2022-11-21 17:05:08,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2057947961, now seen corresponding path program 1 times [2022-11-21 17:05:08,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:08,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339191435] [2022-11-21 17:05:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:08,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:09,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:09,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339191435] [2022-11-21 17:05:09,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339191435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:09,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:09,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:05:09,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961326577] [2022-11-21 17:05:09,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:09,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:05:09,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:05:09,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:05:09,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 142 [2022-11-21 17:05:09,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 121 transitions, 251 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) [2022-11-21 17:05:09,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:09,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 142 [2022-11-21 17:05:09,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:09,788 INFO L130 PetriNetUnfolder]: 157/569 cut-off events. [2022-11-21 17:05:09,788 INFO L131 PetriNetUnfolder]: For 96/106 co-relation queries the response was YES. [2022-11-21 17:05:09,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 569 events. 157/569 cut-off events. For 96/106 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2927 event pairs, 70 based on Foata normal form. 44/365 useless extension candidates. Maximal degree in co-relation 343. Up to 137 conditions per place. [2022-11-21 17:05:09,800 INFO L137 encePairwiseOnDemand]: 127/142 looper letters, 42 selfloop transitions, 4 changer transitions 2/133 dead transitions. [2022-11-21 17:05:09,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 133 transitions, 376 flow [2022-11-21 17:05:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:05:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 17:05:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2022-11-21 17:05:09,826 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8295774647887324 [2022-11-21 17:05:09,827 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2022-11-21 17:05:09,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2022-11-21 17:05:09,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:09,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2022-11-21 17:05:09,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:09,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:09,850 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:09,852 INFO L175 Difference]: Start difference. First operand has 120 places, 121 transitions, 251 flow. Second operand 5 states and 589 transitions. [2022-11-21 17:05:09,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 133 transitions, 376 flow [2022-11-21 17:05:09,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 133 transitions, 366 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 17:05:09,861 INFO L231 Difference]: Finished difference. Result has 120 places, 113 transitions, 254 flow [2022-11-21 17:05:09,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=120, PETRI_TRANSITIONS=113} [2022-11-21 17:05:09,870 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 0 predicate places. [2022-11-21 17:05:09,870 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 113 transitions, 254 flow [2022-11-21 17:05:09,871 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) [2022-11-21 17:05:09,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:09,871 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] [2022-11-21 17:05:09,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:05:09,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash 734160778, now seen corresponding path program 1 times [2022-11-21 17:05:09,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:09,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954004533] [2022-11-21 17:05:09,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:09,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:10,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:10,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954004533] [2022-11-21 17:05:10,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954004533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:10,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:10,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 17:05:10,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168409041] [2022-11-21 17:05:10,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:10,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 17:05:10,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 17:05:10,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:05:10,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 142 [2022-11-21 17:05:10,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 113 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 98.0) internal successors, (686), 7 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:10,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:10,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 142 [2022-11-21 17:05:10,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:10,509 INFO L130 PetriNetUnfolder]: 139/551 cut-off events. [2022-11-21 17:05:10,510 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-21 17:05:10,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 551 events. 139/551 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2915 event pairs, 87 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 630. Up to 226 conditions per place. [2022-11-21 17:05:10,514 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 49 selfloop transitions, 8 changer transitions 2/136 dead transitions. [2022-11-21 17:05:10,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 136 transitions, 424 flow [2022-11-21 17:05:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 17:05:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 17:05:10,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 828 transitions. [2022-11-21 17:05:10,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7288732394366197 [2022-11-21 17:05:10,517 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 828 transitions. [2022-11-21 17:05:10,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 828 transitions. [2022-11-21 17:05:10,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:10,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 828 transitions. [2022-11-21 17:05:10,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 103.5) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:10,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:10,524 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:10,524 INFO L175 Difference]: Start difference. First operand has 120 places, 113 transitions, 254 flow. Second operand 8 states and 828 transitions. [2022-11-21 17:05:10,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 136 transitions, 424 flow [2022-11-21 17:05:10,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 136 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 17:05:10,528 INFO L231 Difference]: Finished difference. Result has 127 places, 115 transitions, 284 flow [2022-11-21 17:05:10,529 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=284, PETRI_PLACES=127, PETRI_TRANSITIONS=115} [2022-11-21 17:05:10,530 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 7 predicate places. [2022-11-21 17:05:10,530 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 115 transitions, 284 flow [2022-11-21 17:05:10,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.0) internal successors, (686), 7 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:10,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:10,531 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] [2022-11-21 17:05:10,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:05:10,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:10,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:10,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1409923475, now seen corresponding path program 1 times [2022-11-21 17:05:10,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:10,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122658939] [2022-11-21 17:05:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:10,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:10,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:10,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122658939] [2022-11-21 17:05:10,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122658939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:10,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743780615] [2022-11-21 17:05:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:10,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:10,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:10,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:10,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:05:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:10,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 17:05:10,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:10,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:10,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743780615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:10,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:10,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 17:05:10,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223748542] [2022-11-21 17:05:10,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:10,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:05:10,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:10,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:05:10,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:05:10,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 142 [2022-11-21 17:05:10,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 115 transitions, 284 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) [2022-11-21 17:05:10,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:10,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 142 [2022-11-21 17:05:10,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:11,576 INFO L130 PetriNetUnfolder]: 324/1173 cut-off events. [2022-11-21 17:05:11,576 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-21 17:05:11,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 1173 events. 324/1173 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6906 event pairs, 145 based on Foata normal form. 3/697 useless extension candidates. Maximal degree in co-relation 1691. Up to 132 conditions per place. [2022-11-21 17:05:11,585 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 88 selfloop transitions, 18 changer transitions 0/192 dead transitions. [2022-11-21 17:05:11,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 192 transitions, 694 flow [2022-11-21 17:05:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 17:05:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 17:05:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1999 transitions. [2022-11-21 17:05:11,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7820813771517997 [2022-11-21 17:05:11,592 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1999 transitions. [2022-11-21 17:05:11,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1999 transitions. [2022-11-21 17:05:11,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:11,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1999 transitions. [2022-11-21 17:05:11,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 111.05555555555556) internal successors, (1999), 18 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:11,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:11,607 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:11,608 INFO L175 Difference]: Start difference. First operand has 127 places, 115 transitions, 284 flow. Second operand 18 states and 1999 transitions. [2022-11-21 17:05:11,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 192 transitions, 694 flow [2022-11-21 17:05:11,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 192 transitions, 684 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 17:05:11,614 INFO L231 Difference]: Finished difference. Result has 144 places, 127 transitions, 380 flow [2022-11-21 17:05:11,615 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=380, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2022-11-21 17:05:11,616 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 24 predicate places. [2022-11-21 17:05:11,616 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 380 flow [2022-11-21 17:05:11,617 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) [2022-11-21 17:05:11,617 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:11,617 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] [2022-11-21 17:05:11,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:05:11,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:11,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:11,825 INFO L85 PathProgramCache]: Analyzing trace with hash 757955234, now seen corresponding path program 1 times [2022-11-21 17:05:11,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:11,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547817294] [2022-11-21 17:05:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:11,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:11,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:11,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547817294] [2022-11-21 17:05:11,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547817294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938453166] [2022-11-21 17:05:11,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:11,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:11,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:11,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:11,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:05:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:12,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 17:05:12,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:12,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:05:12,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938453166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:12,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:05:12,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 17:05:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763418861] [2022-11-21 17:05:12,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:12,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:05:12,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:05:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 17:05:12,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 142 [2022-11-21 17:05:12,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 380 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) [2022-11-21 17:05:12,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:12,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 142 [2022-11-21 17:05:12,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:12,503 INFO L130 PetriNetUnfolder]: 324/1169 cut-off events. [2022-11-21 17:05:12,503 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-11-21 17:05:12,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 1169 events. 324/1169 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6865 event pairs, 145 based on Foata normal form. 4/694 useless extension candidates. Maximal degree in co-relation 1429. Up to 512 conditions per place. [2022-11-21 17:05:12,512 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 38 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2022-11-21 17:05:12,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 135 transitions, 481 flow [2022-11-21 17:05:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:05:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 17:05:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 776 transitions. [2022-11-21 17:05:12,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7806841046277666 [2022-11-21 17:05:12,516 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 776 transitions. [2022-11-21 17:05:12,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 776 transitions. [2022-11-21 17:05:12,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:12,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 776 transitions. [2022-11-21 17:05:12,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.85714285714286) internal successors, (776), 7 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:12,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:12,521 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:12,521 INFO L175 Difference]: Start difference. First operand has 144 places, 127 transitions, 380 flow. Second operand 7 states and 776 transitions. [2022-11-21 17:05:12,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 135 transitions, 481 flow [2022-11-21 17:05:12,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 135 transitions, 449 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-21 17:05:12,529 INFO L231 Difference]: Finished difference. Result has 140 places, 123 transitions, 343 flow [2022-11-21 17:05:12,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=343, PETRI_PLACES=140, PETRI_TRANSITIONS=123} [2022-11-21 17:05:12,532 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 20 predicate places. [2022-11-21 17:05:12,532 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 123 transitions, 343 flow [2022-11-21 17:05:12,533 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) [2022-11-21 17:05:12,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:12,533 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] [2022-11-21 17:05:12,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:05:12,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:12,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 678856734, now seen corresponding path program 1 times [2022-11-21 17:05:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:12,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648861796] [2022-11-21 17:05:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:12,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:12,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:12,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648861796] [2022-11-21 17:05:12,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648861796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:12,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:12,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 17:05:12,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646779415] [2022-11-21 17:05:12,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:12,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 17:05:12,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 17:05:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:05:12,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 142 [2022-11-21 17:05:12,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 123 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 98.14285714285714) internal successors, (687), 7 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:12,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:12,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 142 [2022-11-21 17:05:12,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:13,380 INFO L130 PetriNetUnfolder]: 482/1446 cut-off events. [2022-11-21 17:05:13,380 INFO L131 PetriNetUnfolder]: For 194/197 co-relation queries the response was YES. [2022-11-21 17:05:13,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 1446 events. 482/1446 cut-off events. For 194/197 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8811 event pairs, 350 based on Foata normal form. 3/884 useless extension candidates. Maximal degree in co-relation 2428. Up to 889 conditions per place. [2022-11-21 17:05:13,392 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 38 selfloop transitions, 6 changer transitions 10/133 dead transitions. [2022-11-21 17:05:13,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 133 transitions, 474 flow [2022-11-21 17:05:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 17:05:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 17:05:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 816 transitions. [2022-11-21 17:05:13,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7183098591549296 [2022-11-21 17:05:13,398 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 816 transitions. [2022-11-21 17:05:13,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 816 transitions. [2022-11-21 17:05:13,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:13,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 816 transitions. [2022-11-21 17:05:13,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:13,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:13,405 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:13,405 INFO L175 Difference]: Start difference. First operand has 140 places, 123 transitions, 343 flow. Second operand 8 states and 816 transitions. [2022-11-21 17:05:13,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 133 transitions, 474 flow [2022-11-21 17:05:13,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 133 transitions, 460 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 17:05:13,410 INFO L231 Difference]: Finished difference. Result has 144 places, 121 transitions, 333 flow [2022-11-21 17:05:13,411 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=333, PETRI_PLACES=144, PETRI_TRANSITIONS=121} [2022-11-21 17:05:13,414 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 24 predicate places. [2022-11-21 17:05:13,414 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 121 transitions, 333 flow [2022-11-21 17:05:13,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.14285714285714) internal successors, (687), 7 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:13,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:13,415 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] [2022-11-21 17:05:13,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 17:05:13,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:13,417 INFO L85 PathProgramCache]: Analyzing trace with hash -532535998, now seen corresponding path program 1 times [2022-11-21 17:05:13,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:13,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122020140] [2022-11-21 17:05:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:13,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:05:13,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122020140] [2022-11-21 17:05:13,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122020140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:13,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:13,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:05:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815282581] [2022-11-21 17:05:13,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:13,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:05:13,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:05:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:05:13,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-21 17:05:13,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 121 transitions, 333 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) [2022-11-21 17:05:13,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:13,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-21 17:05:13,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:14,136 INFO L130 PetriNetUnfolder]: 513/1482 cut-off events. [2022-11-21 17:05:14,136 INFO L131 PetriNetUnfolder]: For 91/103 co-relation queries the response was YES. [2022-11-21 17:05:14,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2538 conditions, 1482 events. 513/1482 cut-off events. For 91/103 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10291 event pairs, 200 based on Foata normal form. 0/890 useless extension candidates. Maximal degree in co-relation 2461. Up to 681 conditions per place. [2022-11-21 17:05:14,148 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 23 selfloop transitions, 3 changer transitions 0/131 dead transitions. [2022-11-21 17:05:14,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 131 transitions, 408 flow [2022-11-21 17:05:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:05:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 17:05:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2022-11-21 17:05:14,152 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8661971830985915 [2022-11-21 17:05:14,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2022-11-21 17:05:14,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2022-11-21 17:05:14,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:14,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2022-11-21 17:05:14,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:14,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:14,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:14,157 INFO L175 Difference]: Start difference. First operand has 144 places, 121 transitions, 333 flow. Second operand 3 states and 369 transitions. [2022-11-21 17:05:14,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 131 transitions, 408 flow [2022-11-21 17:05:14,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 131 transitions, 386 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-21 17:05:14,165 INFO L231 Difference]: Finished difference. Result has 133 places, 123 transitions, 336 flow [2022-11-21 17:05:14,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=133, PETRI_TRANSITIONS=123} [2022-11-21 17:05:14,170 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 13 predicate places. [2022-11-21 17:05:14,170 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 123 transitions, 336 flow [2022-11-21 17:05:14,171 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) [2022-11-21 17:05:14,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:14,171 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] [2022-11-21 17:05:14,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 17:05:14,172 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:14,173 INFO L85 PathProgramCache]: Analyzing trace with hash -532536002, now seen corresponding path program 1 times [2022-11-21 17:05:14,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:14,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582603807] [2022-11-21 17:05:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:14,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:14,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582603807] [2022-11-21 17:05:14,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582603807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165403619] [2022-11-21 17:05:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:14,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:14,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:14,871 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:14,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:05:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 17:05:14,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:15,203 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 [2022-11-21 17:05:15,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:05:15,400 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 [2022-11-21 17:05:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:15,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:15,624 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 [2022-11-21 17:05:15,648 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 [2022-11-21 17:05:15,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:15,740 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 [2022-11-21 17:05:15,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:15,751 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 [2022-11-21 17:05:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:15,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165403619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:15,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:15,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-21 17:05:15,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042296223] [2022-11-21 17:05:15,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:15,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 17:05:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 17:05:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=932, Unknown=10, NotChecked=126, Total=1190 [2022-11-21 17:05:15,981 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 142 [2022-11-21 17:05:15,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 123 transitions, 336 flow. Second operand has 35 states, 35 states have (on average 84.08571428571429) internal successors, (2943), 35 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:15,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:15,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 142 [2022-11-21 17:05:15,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:18,410 INFO L130 PetriNetUnfolder]: 2150/4675 cut-off events. [2022-11-21 17:05:18,411 INFO L131 PetriNetUnfolder]: For 325/580 co-relation queries the response was YES. [2022-11-21 17:05:18,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9263 conditions, 4675 events. 2150/4675 cut-off events. For 325/580 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 35998 event pairs, 738 based on Foata normal form. 2/2839 useless extension candidates. Maximal degree in co-relation 9172. Up to 2260 conditions per place. [2022-11-21 17:05:18,450 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 67 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2022-11-21 17:05:18,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 166 transitions, 629 flow [2022-11-21 17:05:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 17:05:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 17:05:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1568 transitions. [2022-11-21 17:05:18,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6134585289514867 [2022-11-21 17:05:18,455 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1568 transitions. [2022-11-21 17:05:18,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1568 transitions. [2022-11-21 17:05:18,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:18,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1568 transitions. [2022-11-21 17:05:18,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.11111111111111) internal successors, (1568), 18 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:18,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:18,466 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:18,466 INFO L175 Difference]: Start difference. First operand has 133 places, 123 transitions, 336 flow. Second operand 18 states and 1568 transitions. [2022-11-21 17:05:18,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 166 transitions, 629 flow [2022-11-21 17:05:18,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 166 transitions, 626 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 17:05:18,470 INFO L231 Difference]: Finished difference. Result has 157 places, 145 transitions, 492 flow [2022-11-21 17:05:18,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=492, PETRI_PLACES=157, PETRI_TRANSITIONS=145} [2022-11-21 17:05:18,471 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 37 predicate places. [2022-11-21 17:05:18,471 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 145 transitions, 492 flow [2022-11-21 17:05:18,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 84.08571428571429) internal successors, (2943), 35 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:18,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:18,473 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] [2022-11-21 17:05:18,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 17:05:18,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:18,679 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:18,679 INFO L85 PathProgramCache]: Analyzing trace with hash -532535999, now seen corresponding path program 1 times [2022-11-21 17:05:18,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:18,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225477309] [2022-11-21 17:05:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:18,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:19,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:19,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225477309] [2022-11-21 17:05:19,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225477309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:19,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13897978] [2022-11-21 17:05:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:19,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:19,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:19,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:19,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 17:05:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:19,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 17:05:19,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:19,680 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 [2022-11-21 17:05:19,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:05:19,849 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 [2022-11-21 17:05:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:19,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:20,090 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 [2022-11-21 17:05:20,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:20,184 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 [2022-11-21 17:05:20,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:20,195 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 [2022-11-21 17:05:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:20,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13897978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:20,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:20,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-21 17:05:20,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551676399] [2022-11-21 17:05:20,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:20,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 17:05:20,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 17:05:20,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=985, Unknown=18, NotChecked=64, Total=1190 [2022-11-21 17:05:20,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 142 [2022-11-21 17:05:20,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 145 transitions, 492 flow. Second operand has 35 states, 35 states have (on average 84.08571428571429) internal successors, (2943), 35 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:20,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:20,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 142 [2022-11-21 17:05:20,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:23,049 INFO L130 PetriNetUnfolder]: 2273/5029 cut-off events. [2022-11-21 17:05:23,049 INFO L131 PetriNetUnfolder]: For 761/1098 co-relation queries the response was YES. [2022-11-21 17:05:23,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10582 conditions, 5029 events. 2273/5029 cut-off events. For 761/1098 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 39143 event pairs, 754 based on Foata normal form. 4/3149 useless extension candidates. Maximal degree in co-relation 10472. Up to 2404 conditions per place. [2022-11-21 17:05:23,101 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 67 selfloop transitions, 33 changer transitions 0/169 dead transitions. [2022-11-21 17:05:23,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 760 flow [2022-11-21 17:05:23,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 17:05:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 17:05:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1567 transitions. [2022-11-21 17:05:23,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6130672926447575 [2022-11-21 17:05:23,106 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1567 transitions. [2022-11-21 17:05:23,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1567 transitions. [2022-11-21 17:05:23,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:23,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1567 transitions. [2022-11-21 17:05:23,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.05555555555556) internal successors, (1567), 18 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:23,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:23,118 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:23,119 INFO L175 Difference]: Start difference. First operand has 157 places, 145 transitions, 492 flow. Second operand 18 states and 1567 transitions. [2022-11-21 17:05:23,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 760 flow [2022-11-21 17:05:23,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 169 transitions, 751 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 17:05:23,126 INFO L231 Difference]: Finished difference. Result has 170 places, 149 transitions, 577 flow [2022-11-21 17:05:23,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=577, PETRI_PLACES=170, PETRI_TRANSITIONS=149} [2022-11-21 17:05:23,128 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 50 predicate places. [2022-11-21 17:05:23,129 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 149 transitions, 577 flow [2022-11-21 17:05:23,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 84.08571428571429) internal successors, (2943), 35 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:23,130 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:23,131 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] [2022-11-21 17:05:23,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 17:05:23,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-21 17:05:23,337 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:23,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:23,337 INFO L85 PathProgramCache]: Analyzing trace with hash 829907582, now seen corresponding path program 1 times [2022-11-21 17:05:23,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:23,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361056896] [2022-11-21 17:05:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:23,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:05:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361056896] [2022-11-21 17:05:23,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361056896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:05:23,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:05:23,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:05:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695665180] [2022-11-21 17:05:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:05:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:05:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:23,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:05:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:05:23,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-21 17:05:23,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 149 transitions, 577 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:23,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:23,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-21 17:05:23,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:24,401 INFO L130 PetriNetUnfolder]: 1504/4360 cut-off events. [2022-11-21 17:05:24,402 INFO L131 PetriNetUnfolder]: For 1349/1579 co-relation queries the response was YES. [2022-11-21 17:05:24,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9495 conditions, 4360 events. 1504/4360 cut-off events. For 1349/1579 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 39181 event pairs, 589 based on Foata normal form. 17/2870 useless extension candidates. Maximal degree in co-relation 9398. Up to 1511 conditions per place. [2022-11-21 17:05:24,441 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 58 selfloop transitions, 7 changer transitions 0/181 dead transitions. [2022-11-21 17:05:24,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 181 transitions, 823 flow [2022-11-21 17:05:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:05:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 17:05:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2022-11-21 17:05:24,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8323943661971831 [2022-11-21 17:05:24,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2022-11-21 17:05:24,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2022-11-21 17:05:24,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:24,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2022-11-21 17:05:24,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:24,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:24,448 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:24,448 INFO L175 Difference]: Start difference. First operand has 170 places, 149 transitions, 577 flow. Second operand 5 states and 591 transitions. [2022-11-21 17:05:24,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 181 transitions, 823 flow [2022-11-21 17:05:24,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 181 transitions, 787 flow, removed 3 selfloop flow, removed 14 redundant places. [2022-11-21 17:05:24,461 INFO L231 Difference]: Finished difference. Result has 163 places, 153 transitions, 595 flow [2022-11-21 17:05:24,462 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=595, PETRI_PLACES=163, PETRI_TRANSITIONS=153} [2022-11-21 17:05:24,463 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 43 predicate places. [2022-11-21 17:05:24,463 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 153 transitions, 595 flow [2022-11-21 17:05:24,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:24,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:24,464 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] [2022-11-21 17:05:24,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 17:05:24,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:24,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1400933942, now seen corresponding path program 1 times [2022-11-21 17:05:24,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:24,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819561772] [2022-11-21 17:05:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:24,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:25,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:25,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819561772] [2022-11-21 17:05:25,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819561772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:25,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232418661] [2022-11-21 17:05:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:25,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:25,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:25,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:25,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 17:05:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 17:05:25,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:25,411 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 [2022-11-21 17:05:25,592 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:05:25,592 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 [2022-11-21 17:05:25,754 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 [2022-11-21 17:05:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:05:26,036 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 [2022-11-21 17:05:26,181 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 [2022-11-21 17:05:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:26,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:26,270 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_161 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_161) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 9223372039002259456))) is different from false [2022-11-21 17:05:26,313 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_161 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_161) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-11-21 17:05:26,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:26,671 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 [2022-11-21 17:05:26,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:26,681 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 [2022-11-21 17:05:26,688 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 26 [2022-11-21 17:05:26,694 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 [2022-11-21 17:05:27,212 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 [2022-11-21 17:05:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:27,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232418661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:27,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:27,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-21 17:05:27,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854592365] [2022-11-21 17:05:27,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:27,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-21 17:05:27,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-21 17:05:27,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1320, Unknown=26, NotChecked=150, Total=1640 [2022-11-21 17:05:27,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-21 17:05:27,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 153 transitions, 595 flow. Second operand has 41 states, 41 states have (on average 79.0) internal successors, (3239), 41 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:27,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:27,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-21 17:05:27,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:30,756 INFO L130 PetriNetUnfolder]: 2594/6884 cut-off events. [2022-11-21 17:05:30,757 INFO L131 PetriNetUnfolder]: For 5269/5699 co-relation queries the response was YES. [2022-11-21 17:05:30,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 6884 events. 2594/6884 cut-off events. For 5269/5699 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 63634 event pairs, 1276 based on Foata normal form. 39/4982 useless extension candidates. Maximal degree in co-relation 15515. Up to 2219 conditions per place. [2022-11-21 17:05:30,810 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 107 selfloop transitions, 39 changer transitions 0/213 dead transitions. [2022-11-21 17:05:30,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 213 transitions, 1126 flow [2022-11-21 17:05:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 17:05:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-21 17:05:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1585 transitions. [2022-11-21 17:05:30,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5874722016308377 [2022-11-21 17:05:30,815 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1585 transitions. [2022-11-21 17:05:30,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1585 transitions. [2022-11-21 17:05:30,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:30,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1585 transitions. [2022-11-21 17:05:30,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.42105263157895) internal successors, (1585), 19 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:30,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:30,826 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:30,827 INFO L175 Difference]: Start difference. First operand has 163 places, 153 transitions, 595 flow. Second operand 19 states and 1585 transitions. [2022-11-21 17:05:30,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 213 transitions, 1126 flow [2022-11-21 17:05:30,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 213 transitions, 1122 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 17:05:30,836 INFO L231 Difference]: Finished difference. Result has 183 places, 166 transitions, 817 flow [2022-11-21 17:05:30,837 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=817, PETRI_PLACES=183, PETRI_TRANSITIONS=166} [2022-11-21 17:05:30,837 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 63 predicate places. [2022-11-21 17:05:30,838 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 166 transitions, 817 flow [2022-11-21 17:05:30,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 79.0) internal successors, (3239), 41 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:30,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:30,840 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] [2022-11-21 17:05:30,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-21 17:05:31,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 17:05:31,045 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1464774197, now seen corresponding path program 1 times [2022-11-21 17:05:31,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:31,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088838344] [2022-11-21 17:05:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:31,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:31,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:31,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088838344] [2022-11-21 17:05:31,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088838344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:31,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53995042] [2022-11-21 17:05:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:31,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:31,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:31,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:31,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 17:05:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:31,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 17:05:31,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:31,882 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 [2022-11-21 17:05:31,914 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:05:31,915 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 [2022-11-21 17:05:32,091 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:05:32,092 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 [2022-11-21 17:05:32,227 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 [2022-11-21 17:05:32,459 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 [2022-11-21 17:05:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:05:32,568 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 [2022-11-21 17:05:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:32,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:32,790 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_191 (Array Int Int)) (v_ArrVal_190 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_190) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_191) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-21 17:05:33,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:33,077 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 [2022-11-21 17:05:33,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:33,091 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 [2022-11-21 17:05:33,095 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 [2022-11-21 17:05:33,102 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 [2022-11-21 17:05:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:33,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53995042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:33,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:33,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-11-21 17:05:33,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988986577] [2022-11-21 17:05:33,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:33,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-21 17:05:33,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:33,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-21 17:05:33,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1462, Unknown=38, NotChecked=78, Total=1722 [2022-11-21 17:05:33,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-21 17:05:33,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 166 transitions, 817 flow. Second operand has 42 states, 42 states have (on average 78.97619047619048) internal successors, (3317), 42 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:33,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:33,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-21 17:05:33,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:37,195 INFO L130 PetriNetUnfolder]: 2568/6839 cut-off events. [2022-11-21 17:05:37,195 INFO L131 PetriNetUnfolder]: For 8580/9011 co-relation queries the response was YES. [2022-11-21 17:05:37,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16587 conditions, 6839 events. 2568/6839 cut-off events. For 8580/9011 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 63342 event pairs, 1250 based on Foata normal form. 39/4953 useless extension candidates. Maximal degree in co-relation 16461. Up to 2219 conditions per place. [2022-11-21 17:05:37,252 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 106 selfloop transitions, 39 changer transitions 0/212 dead transitions. [2022-11-21 17:05:37,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 212 transitions, 1243 flow [2022-11-21 17:05:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 17:05:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-21 17:05:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1584 transitions. [2022-11-21 17:05:37,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5871015567086731 [2022-11-21 17:05:37,258 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1584 transitions. [2022-11-21 17:05:37,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1584 transitions. [2022-11-21 17:05:37,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:37,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1584 transitions. [2022-11-21 17:05:37,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.36842105263158) internal successors, (1584), 19 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:37,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:37,270 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:37,270 INFO L175 Difference]: Start difference. First operand has 183 places, 166 transitions, 817 flow. Second operand 19 states and 1584 transitions. [2022-11-21 17:05:37,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 212 transitions, 1243 flow [2022-11-21 17:05:37,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 212 transitions, 1215 flow, removed 1 selfloop flow, removed 13 redundant places. [2022-11-21 17:05:37,290 INFO L231 Difference]: Finished difference. Result has 188 places, 166 transitions, 868 flow [2022-11-21 17:05:37,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=868, PETRI_PLACES=188, PETRI_TRANSITIONS=166} [2022-11-21 17:05:37,291 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 68 predicate places. [2022-11-21 17:05:37,291 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 166 transitions, 868 flow [2022-11-21 17:05:37,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 78.97619047619048) internal successors, (3317), 42 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:37,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:37,293 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] [2022-11-21 17:05:37,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-21 17:05:37,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 17:05:37,498 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:37,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:37,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1834364626, now seen corresponding path program 1 times [2022-11-21 17:05:37,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:37,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202746840] [2022-11-21 17:05:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:37,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:38,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:38,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202746840] [2022-11-21 17:05:38,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202746840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:38,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637086397] [2022-11-21 17:05:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:38,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:38,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:38,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:38,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 17:05:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:38,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 17:05:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:38,331 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 [2022-11-21 17:05:38,450 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:05:38,450 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 [2022-11-21 17:05:38,577 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 [2022-11-21 17:05:38,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:05:38,785 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 [2022-11-21 17:05:38,841 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 [2022-11-21 17:05:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:38,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:39,192 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_219 (Array Int Int)) (v_ArrVal_220 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_219) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_220) |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 [2022-11-21 17:05:39,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:39,300 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 [2022-11-21 17:05:39,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:39,309 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 [2022-11-21 17:05:39,314 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 98 [2022-11-21 17:05:39,322 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 51 treesize of output 47 [2022-11-21 17:05:39,873 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 [2022-11-21 17:05:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:39,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637086397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:39,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:39,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-21 17:05:39,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084242906] [2022-11-21 17:05:39,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:39,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-21 17:05:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-21 17:05:39,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1366, Unknown=42, NotChecked=76, Total=1640 [2022-11-21 17:05:39,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-21 17:05:39,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 166 transitions, 868 flow. Second operand has 41 states, 41 states have (on average 79.07317073170732) internal successors, (3242), 41 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:39,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:39,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-21 17:05:39,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:43,092 INFO L130 PetriNetUnfolder]: 2972/8079 cut-off events. [2022-11-21 17:05:43,092 INFO L131 PetriNetUnfolder]: For 15257/15737 co-relation queries the response was YES. [2022-11-21 17:05:43,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20753 conditions, 8079 events. 2972/8079 cut-off events. For 15257/15737 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 83369 event pairs, 1078 based on Foata normal form. 4/6054 useless extension candidates. Maximal degree in co-relation 20626. Up to 2015 conditions per place. [2022-11-21 17:05:43,148 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 118 selfloop transitions, 27 changer transitions 0/224 dead transitions. [2022-11-21 17:05:43,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 224 transitions, 1485 flow [2022-11-21 17:05:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 17:05:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-21 17:05:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1581 transitions. [2022-11-21 17:05:43,152 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5859896219421794 [2022-11-21 17:05:43,152 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1581 transitions. [2022-11-21 17:05:43,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1581 transitions. [2022-11-21 17:05:43,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:43,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1581 transitions. [2022-11-21 17:05:43,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.21052631578948) internal successors, (1581), 19 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:43,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:43,161 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:43,161 INFO L175 Difference]: Start difference. First operand has 188 places, 166 transitions, 868 flow. Second operand 19 states and 1581 transitions. [2022-11-21 17:05:43,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 224 transitions, 1485 flow [2022-11-21 17:05:43,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 224 transitions, 1448 flow, removed 3 selfloop flow, removed 14 redundant places. [2022-11-21 17:05:43,178 INFO L231 Difference]: Finished difference. Result has 194 places, 177 transitions, 941 flow [2022-11-21 17:05:43,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=941, PETRI_PLACES=194, PETRI_TRANSITIONS=177} [2022-11-21 17:05:43,179 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 74 predicate places. [2022-11-21 17:05:43,179 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 177 transitions, 941 flow [2022-11-21 17:05:43,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 79.07317073170732) internal successors, (3242), 41 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:43,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:43,181 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] [2022-11-21 17:05:43,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 17:05:43,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 17:05:43,400 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1834364629, now seen corresponding path program 1 times [2022-11-21 17:05:43,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:43,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11924405] [2022-11-21 17:05:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:43,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:44,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:44,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11924405] [2022-11-21 17:05:44,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11924405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:44,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364701347] [2022-11-21 17:05:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:44,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:44,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:44,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:44,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 17:05:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:44,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 17:05:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:44,235 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 [2022-11-21 17:05:44,333 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:05:44,334 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 [2022-11-21 17:05:44,458 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 [2022-11-21 17:05:44,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:05:44,680 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 [2022-11-21 17:05:44,739 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 [2022-11-21 17:05:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:44,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:44,867 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_249 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_249) c_~A~0.base) c_~A~0.offset) 4294967296))) is different from false [2022-11-21 17:05:44,963 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_249 (Array Int Int)) (v_ArrVal_248 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_248) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_249) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 4294967296))) is different from false [2022-11-21 17:05:45,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:45,133 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 [2022-11-21 17:05:45,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:45,143 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 142 treesize of output 136 [2022-11-21 17:05:45,163 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 61 treesize of output 57 [2022-11-21 17:05:45,168 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 [2022-11-21 17:05:45,627 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 [2022-11-21 17:05:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:45,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364701347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:45,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:45,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2022-11-21 17:05:45,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442531216] [2022-11-21 17:05:45,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:45,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-21 17:05:45,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:45,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-21 17:05:45,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1255, Unknown=14, NotChecked=146, Total=1560 [2022-11-21 17:05:45,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-21 17:05:45,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 177 transitions, 941 flow. Second operand has 40 states, 40 states have (on average 79.05) internal successors, (3162), 40 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:45,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:45,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-21 17:05:45,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:48,881 INFO L130 PetriNetUnfolder]: 2940/8011 cut-off events. [2022-11-21 17:05:48,881 INFO L131 PetriNetUnfolder]: For 15768/16248 co-relation queries the response was YES. [2022-11-21 17:05:48,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22387 conditions, 8011 events. 2940/8011 cut-off events. For 15768/16248 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 82745 event pairs, 1078 based on Foata normal form. 4/6254 useless extension candidates. Maximal degree in co-relation 22257. Up to 2015 conditions per place. [2022-11-21 17:05:48,933 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 117 selfloop transitions, 27 changer transitions 0/223 dead transitions. [2022-11-21 17:05:48,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 223 transitions, 1520 flow [2022-11-21 17:05:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 17:05:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-21 17:05:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1580 transitions. [2022-11-21 17:05:48,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5856189770200149 [2022-11-21 17:05:48,940 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1580 transitions. [2022-11-21 17:05:48,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1580 transitions. [2022-11-21 17:05:48,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:48,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1580 transitions. [2022-11-21 17:05:48,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.15789473684211) internal successors, (1580), 19 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:48,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:48,950 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:48,950 INFO L175 Difference]: Start difference. First operand has 194 places, 177 transitions, 941 flow. Second operand 19 states and 1580 transitions. [2022-11-21 17:05:48,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 223 transitions, 1520 flow [2022-11-21 17:05:48,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 223 transitions, 1494 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-11-21 17:05:48,975 INFO L231 Difference]: Finished difference. Result has 199 places, 177 transitions, 969 flow [2022-11-21 17:05:48,975 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=969, PETRI_PLACES=199, PETRI_TRANSITIONS=177} [2022-11-21 17:05:48,976 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 79 predicate places. [2022-11-21 17:05:48,976 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 177 transitions, 969 flow [2022-11-21 17:05:48,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 79.05) internal successors, (3162), 40 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:48,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:48,978 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] [2022-11-21 17:05:48,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-21 17:05:49,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:49,183 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:49,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1437114285, now seen corresponding path program 1 times [2022-11-21 17:05:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584347636] [2022-11-21 17:05:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:49,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584347636] [2022-11-21 17:05:49,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584347636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:49,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940005658] [2022-11-21 17:05:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:49,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:49,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:49,395 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:49,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 17:05:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:49,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 17:05:49,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:49,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:49,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940005658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:49,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:49,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-21 17:05:49,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281744521] [2022-11-21 17:05:49,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:49,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 17:05:49,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 17:05:49,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-21 17:05:49,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 142 [2022-11-21 17:05:49,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 177 transitions, 969 flow. Second operand has 24 states, 24 states have (on average 88.83333333333333) internal successors, (2132), 24 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:49,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:49,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 142 [2022-11-21 17:05:49,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:05:51,281 INFO L130 PetriNetUnfolder]: 1552/4758 cut-off events. [2022-11-21 17:05:51,281 INFO L131 PetriNetUnfolder]: For 7447/7582 co-relation queries the response was YES. [2022-11-21 17:05:51,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13934 conditions, 4758 events. 1552/4758 cut-off events. For 7447/7582 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 41623 event pairs, 966 based on Foata normal form. 16/3825 useless extension candidates. Maximal degree in co-relation 13809. Up to 2414 conditions per place. [2022-11-21 17:05:51,313 INFO L137 encePairwiseOnDemand]: 126/142 looper letters, 130 selfloop transitions, 23 changer transitions 5/240 dead transitions. [2022-11-21 17:05:51,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 240 transitions, 1483 flow [2022-11-21 17:05:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 17:05:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-21 17:05:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1591 transitions. [2022-11-21 17:05:51,318 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6590720795360397 [2022-11-21 17:05:51,318 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1591 transitions. [2022-11-21 17:05:51,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1591 transitions. [2022-11-21 17:05:51,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:05:51,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1591 transitions. [2022-11-21 17:05:51,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 93.58823529411765) internal successors, (1591), 17 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:51,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:51,327 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:51,327 INFO L175 Difference]: Start difference. First operand has 199 places, 177 transitions, 969 flow. Second operand 17 states and 1591 transitions. [2022-11-21 17:05:51,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 240 transitions, 1483 flow [2022-11-21 17:05:51,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 240 transitions, 1425 flow, removed 9 selfloop flow, removed 18 redundant places. [2022-11-21 17:05:51,355 INFO L231 Difference]: Finished difference. Result has 198 places, 167 transitions, 846 flow [2022-11-21 17:05:51,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=846, PETRI_PLACES=198, PETRI_TRANSITIONS=167} [2022-11-21 17:05:51,356 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 78 predicate places. [2022-11-21 17:05:51,356 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 167 transitions, 846 flow [2022-11-21 17:05:51,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 88.83333333333333) internal successors, (2132), 24 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:05:51,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:05:51,357 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] [2022-11-21 17:05:51,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 17:05:51,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 17:05:51,563 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:05:51,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:51,563 INFO L85 PathProgramCache]: Analyzing trace with hash -959802870, now seen corresponding path program 2 times [2022-11-21 17:05:51,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:51,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895788175] [2022-11-21 17:05:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:51,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:52,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:52,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895788175] [2022-11-21 17:05:52,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895788175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:52,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842396343] [2022-11-21 17:05:52,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:05:52,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:52,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:52,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:52,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 17:05:52,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:05:52,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:05:52,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 17:05:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:52,609 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 [2022-11-21 17:05:52,777 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 17:05:52,777 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 [2022-11-21 17:05:52,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:05:52,962 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 [2022-11-21 17:05:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:53,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:53,088 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_298 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_298) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-11-21 17:05:55,910 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-21 17:05:55,910 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 [2022-11-21 17:05:55,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:05:55,921 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 [2022-11-21 17:05:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:05:58,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842396343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:05:58,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:05:58,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-21 17:05:58,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480399123] [2022-11-21 17:05:58,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:58,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 17:05:58,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 17:05:58,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1534, Unknown=24, NotChecked=80, Total=1806 [2022-11-21 17:05:58,163 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-21 17:05:58,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 167 transitions, 846 flow. Second operand has 43 states, 43 states have (on average 79.53488372093024) internal successors, (3420), 43 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) [2022-11-21 17:05:58,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:05:58,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-21 17:05:58,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:01,199 INFO L130 PetriNetUnfolder]: 2645/7042 cut-off events. [2022-11-21 17:06:01,199 INFO L131 PetriNetUnfolder]: For 14182/14620 co-relation queries the response was YES. [2022-11-21 17:06:01,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20624 conditions, 7042 events. 2645/7042 cut-off events. For 14182/14620 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 63417 event pairs, 842 based on Foata normal form. 100/5842 useless extension candidates. Maximal degree in co-relation 20490. Up to 2741 conditions per place. [2022-11-21 17:06:01,249 INFO L137 encePairwiseOnDemand]: 119/142 looper letters, 90 selfloop transitions, 54 changer transitions 0/210 dead transitions. [2022-11-21 17:06:01,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 210 transitions, 1427 flow [2022-11-21 17:06:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:06:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 17:06:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1704 transitions. [2022-11-21 17:06:01,253 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2022-11-21 17:06:01,253 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1704 transitions. [2022-11-21 17:06:01,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1704 transitions. [2022-11-21 17:06:01,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:01,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1704 transitions. [2022-11-21 17:06:01,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 81.14285714285714) internal successors, (1704), 21 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:01,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:01,263 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:01,263 INFO L175 Difference]: Start difference. First operand has 198 places, 167 transitions, 846 flow. Second operand 21 states and 1704 transitions. [2022-11-21 17:06:01,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 210 transitions, 1427 flow [2022-11-21 17:06:01,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 210 transitions, 1412 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-21 17:06:01,285 INFO L231 Difference]: Finished difference. Result has 214 places, 179 transitions, 1088 flow [2022-11-21 17:06:01,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1088, PETRI_PLACES=214, PETRI_TRANSITIONS=179} [2022-11-21 17:06:01,286 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 94 predicate places. [2022-11-21 17:06:01,286 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 179 transitions, 1088 flow [2022-11-21 17:06:01,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 79.53488372093024) internal successors, (3420), 43 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) [2022-11-21 17:06:01,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:01,287 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] [2022-11-21 17:06:01,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 17:06:01,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:01,493 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:01,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:01,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1606528545, now seen corresponding path program 1 times [2022-11-21 17:06:01,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:01,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737132263] [2022-11-21 17:06:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:01,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:06:01,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:01,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737132263] [2022-11-21 17:06:01,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737132263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:06:01,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:06:01,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:06:01,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026398318] [2022-11-21 17:06:01,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:06:01,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:06:01,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:06:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:06:01,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-21 17:06:01,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 179 transitions, 1088 flow. Second operand has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:01,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:01,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-21 17:06:01,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:02,691 INFO L130 PetriNetUnfolder]: 1771/5114 cut-off events. [2022-11-21 17:06:02,691 INFO L131 PetriNetUnfolder]: For 20231/20307 co-relation queries the response was YES. [2022-11-21 17:06:02,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18416 conditions, 5114 events. 1771/5114 cut-off events. For 20231/20307 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 47543 event pairs, 419 based on Foata normal form. 7/4108 useless extension candidates. Maximal degree in co-relation 18298. Up to 2291 conditions per place. [2022-11-21 17:06:02,726 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 77 selfloop transitions, 6 changer transitions 0/218 dead transitions. [2022-11-21 17:06:02,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 218 transitions, 1608 flow [2022-11-21 17:06:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:06:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 17:06:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2022-11-21 17:06:02,728 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8309859154929577 [2022-11-21 17:06:02,728 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2022-11-21 17:06:02,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2022-11-21 17:06:02,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:02,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2022-11-21 17:06:02,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:02,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:02,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:02,732 INFO L175 Difference]: Start difference. First operand has 214 places, 179 transitions, 1088 flow. Second operand 5 states and 590 transitions. [2022-11-21 17:06:02,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 218 transitions, 1608 flow [2022-11-21 17:06:02,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 218 transitions, 1519 flow, removed 0 selfloop flow, removed 16 redundant places. [2022-11-21 17:06:02,759 INFO L231 Difference]: Finished difference. Result has 205 places, 182 transitions, 1061 flow [2022-11-21 17:06:02,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1061, PETRI_PLACES=205, PETRI_TRANSITIONS=182} [2022-11-21 17:06:02,760 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 85 predicate places. [2022-11-21 17:06:02,760 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 182 transitions, 1061 flow [2022-11-21 17:06:02,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:02,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:02,761 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] [2022-11-21 17:06:02,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 17:06:02,761 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:02,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:02,762 INFO L85 PathProgramCache]: Analyzing trace with hash -959802867, now seen corresponding path program 2 times [2022-11-21 17:06:02,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:02,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154638658] [2022-11-21 17:06:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154638658] [2022-11-21 17:06:03,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154638658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136343000] [2022-11-21 17:06:03,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:06:03,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:03,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:03,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:03,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 17:06:03,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:06:03,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:06:03,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 17:06:03,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:03,751 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 [2022-11-21 17:06:03,911 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 17:06:03,911 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 [2022-11-21 17:06:04,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:06:04,091 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 [2022-11-21 17:06:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:04,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:04,230 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_339) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-21 17:06:04,244 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_339) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 4294967295)) is different from false [2022-11-21 17:06:04,309 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_339) |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 [2022-11-21 17:06:06,583 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int)) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_36| Int) (v_ArrVal_337 Int)) (or (<= (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_36| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_337)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_339) |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_36| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)))) is different from false [2022-11-21 17:06:06,618 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-21 17:06:06,618 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 [2022-11-21 17:06:06,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:06:06,627 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 [2022-11-21 17:06:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-21 17:06:06,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136343000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:06,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:06,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-21 17:06:06,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512051039] [2022-11-21 17:06:06,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:06,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 17:06:06,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:06,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 17:06:06,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=16, NotChecked=308, Total=1806 [2022-11-21 17:06:06,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-21 17:06:06,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 182 transitions, 1061 flow. Second operand has 43 states, 43 states have (on average 79.53488372093024) internal successors, (3420), 43 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) [2022-11-21 17:06:06,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:06,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-21 17:06:06,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:10,433 INFO L130 PetriNetUnfolder]: 3173/9134 cut-off events. [2022-11-21 17:06:10,433 INFO L131 PetriNetUnfolder]: For 22024/22477 co-relation queries the response was YES. [2022-11-21 17:06:10,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28305 conditions, 9134 events. 3173/9134 cut-off events. For 22024/22477 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 91114 event pairs, 1244 based on Foata normal form. 107/8129 useless extension candidates. Maximal degree in co-relation 28171. Up to 3386 conditions per place. [2022-11-21 17:06:10,517 INFO L137 encePairwiseOnDemand]: 119/142 looper letters, 89 selfloop transitions, 53 changer transitions 0/211 dead transitions. [2022-11-21 17:06:10,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 211 transitions, 1504 flow [2022-11-21 17:06:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:06:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 17:06:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1703 transitions. [2022-11-21 17:06:10,520 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5710932260228034 [2022-11-21 17:06:10,521 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1703 transitions. [2022-11-21 17:06:10,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1703 transitions. [2022-11-21 17:06:10,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:10,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1703 transitions. [2022-11-21 17:06:10,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 81.0952380952381) internal successors, (1703), 21 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:10,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:10,529 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:10,529 INFO L175 Difference]: Start difference. First operand has 205 places, 182 transitions, 1061 flow. Second operand 21 states and 1703 transitions. [2022-11-21 17:06:10,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 211 transitions, 1504 flow [2022-11-21 17:06:10,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 211 transitions, 1501 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 17:06:10,607 INFO L231 Difference]: Finished difference. Result has 224 places, 181 transitions, 1158 flow [2022-11-21 17:06:10,608 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1158, PETRI_PLACES=224, PETRI_TRANSITIONS=181} [2022-11-21 17:06:10,608 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 104 predicate places. [2022-11-21 17:06:10,609 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 181 transitions, 1158 flow [2022-11-21 17:06:10,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 79.53488372093024) internal successors, (3420), 43 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) [2022-11-21 17:06:10,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:10,610 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:06:10,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 17:06:10,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 17:06:10,815 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash -518253133, now seen corresponding path program 1 times [2022-11-21 17:06:10,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:10,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313399798] [2022-11-21 17:06:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:10,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:06:10,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:10,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313399798] [2022-11-21 17:06:10,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313399798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:06:10,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:06:10,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:06:10,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071406510] [2022-11-21 17:06:10,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:06:10,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:06:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:06:10,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:06:10,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-21 17:06:10,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 181 transitions, 1158 flow. Second operand has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:10,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:10,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-21 17:06:10,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:12,052 INFO L130 PetriNetUnfolder]: 815/4094 cut-off events. [2022-11-21 17:06:12,052 INFO L131 PetriNetUnfolder]: For 13400/13538 co-relation queries the response was YES. [2022-11-21 17:06:12,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12584 conditions, 4094 events. 815/4094 cut-off events. For 13400/13538 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 42731 event pairs, 180 based on Foata normal form. 21/3802 useless extension candidates. Maximal degree in co-relation 12461. Up to 866 conditions per place. [2022-11-21 17:06:12,102 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 66 selfloop transitions, 19 changer transitions 0/230 dead transitions. [2022-11-21 17:06:12,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 1692 flow [2022-11-21 17:06:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:06:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 17:06:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 619 transitions. [2022-11-21 17:06:12,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8718309859154929 [2022-11-21 17:06:12,104 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 619 transitions. [2022-11-21 17:06:12,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 619 transitions. [2022-11-21 17:06:12,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:12,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 619 transitions. [2022-11-21 17:06:12,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:12,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:12,107 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:12,107 INFO L175 Difference]: Start difference. First operand has 224 places, 181 transitions, 1158 flow. Second operand 5 states and 619 transitions. [2022-11-21 17:06:12,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 1692 flow [2022-11-21 17:06:12,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 230 transitions, 1547 flow, removed 8 selfloop flow, removed 19 redundant places. [2022-11-21 17:06:12,141 INFO L231 Difference]: Finished difference. Result has 213 places, 193 transitions, 1258 flow [2022-11-21 17:06:12,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1258, PETRI_PLACES=213, PETRI_TRANSITIONS=193} [2022-11-21 17:06:12,142 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 93 predicate places. [2022-11-21 17:06:12,142 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 193 transitions, 1258 flow [2022-11-21 17:06:12,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:12,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:12,143 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:06:12,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 17:06:12,143 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:12,144 INFO L85 PathProgramCache]: Analyzing trace with hash -518253132, now seen corresponding path program 1 times [2022-11-21 17:06:12,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:12,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901096364] [2022-11-21 17:06:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:12,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:06:12,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:12,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901096364] [2022-11-21 17:06:12,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901096364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:06:12,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:06:12,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:06:12,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531208270] [2022-11-21 17:06:12,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:06:12,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:06:12,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:12,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:06:12,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:06:12,279 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-21 17:06:12,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 193 transitions, 1258 flow. Second operand has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:12,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:12,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-21 17:06:12,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:13,250 INFO L130 PetriNetUnfolder]: 713/3988 cut-off events. [2022-11-21 17:06:13,250 INFO L131 PetriNetUnfolder]: For 18226/18677 co-relation queries the response was YES. [2022-11-21 17:06:13,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12619 conditions, 3988 events. 713/3988 cut-off events. For 18226/18677 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 41915 event pairs, 141 based on Foata normal form. 201/4028 useless extension candidates. Maximal degree in co-relation 12502. Up to 706 conditions per place. [2022-11-21 17:06:13,284 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 72 selfloop transitions, 25 changer transitions 0/242 dead transitions. [2022-11-21 17:06:13,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 242 transitions, 1868 flow [2022-11-21 17:06:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:06:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 17:06:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 619 transitions. [2022-11-21 17:06:13,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8718309859154929 [2022-11-21 17:06:13,286 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 619 transitions. [2022-11-21 17:06:13,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 619 transitions. [2022-11-21 17:06:13,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:13,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 619 transitions. [2022-11-21 17:06:13,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:13,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:13,290 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:13,290 INFO L175 Difference]: Start difference. First operand has 213 places, 193 transitions, 1258 flow. Second operand 5 states and 619 transitions. [2022-11-21 17:06:13,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 242 transitions, 1868 flow [2022-11-21 17:06:13,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 242 transitions, 1868 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 17:06:13,331 INFO L231 Difference]: Finished difference. Result has 221 places, 207 transitions, 1575 flow [2022-11-21 17:06:13,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1575, PETRI_PLACES=221, PETRI_TRANSITIONS=207} [2022-11-21 17:06:13,331 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 101 predicate places. [2022-11-21 17:06:13,332 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 207 transitions, 1575 flow [2022-11-21 17:06:13,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:13,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:13,332 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:06:13,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 17:06:13,333 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:13,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:13,333 INFO L85 PathProgramCache]: Analyzing trace with hash 746540164, now seen corresponding path program 1 times [2022-11-21 17:06:13,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:13,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251798319] [2022-11-21 17:06:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:13,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:06:13,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:13,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251798319] [2022-11-21 17:06:13,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251798319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:06:13,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:06:13,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:06:13,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378578992] [2022-11-21 17:06:13,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:06:13,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:06:13,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:06:13,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:06:13,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-21 17:06:13,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 207 transitions, 1575 flow. Second operand has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:13,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:13,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-21 17:06:13,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:14,465 INFO L130 PetriNetUnfolder]: 654/3662 cut-off events. [2022-11-21 17:06:14,465 INFO L131 PetriNetUnfolder]: For 20402/20942 co-relation queries the response was YES. [2022-11-21 17:06:14,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11756 conditions, 3662 events. 654/3662 cut-off events. For 20402/20942 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 37196 event pairs, 126 based on Foata normal form. 240/3759 useless extension candidates. Maximal degree in co-relation 11633. Up to 729 conditions per place. [2022-11-21 17:06:14,491 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 65 selfloop transitions, 10 changer transitions 0/220 dead transitions. [2022-11-21 17:06:14,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 220 transitions, 1661 flow [2022-11-21 17:06:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:06:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 17:06:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2022-11-21 17:06:14,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8549295774647887 [2022-11-21 17:06:14,494 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2022-11-21 17:06:14,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2022-11-21 17:06:14,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:14,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2022-11-21 17:06:14,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:14,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:14,497 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:14,497 INFO L175 Difference]: Start difference. First operand has 221 places, 207 transitions, 1575 flow. Second operand 5 states and 607 transitions. [2022-11-21 17:06:14,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 220 transitions, 1661 flow [2022-11-21 17:06:14,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 220 transitions, 1637 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-21 17:06:14,536 INFO L231 Difference]: Finished difference. Result has 223 places, 195 transitions, 1336 flow [2022-11-21 17:06:14,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1336, PETRI_PLACES=223, PETRI_TRANSITIONS=195} [2022-11-21 17:06:14,537 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 103 predicate places. [2022-11-21 17:06:14,537 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 195 transitions, 1336 flow [2022-11-21 17:06:14,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:14,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:14,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:06:14,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 17:06:14,538 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1484174697, now seen corresponding path program 1 times [2022-11-21 17:06:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:14,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009086215] [2022-11-21 17:06:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:14,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:06:14,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:14,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009086215] [2022-11-21 17:06:14,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009086215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:06:14,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:06:14,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:06:14,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727957319] [2022-11-21 17:06:14,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:06:14,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:06:14,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:14,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:06:14,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:06:14,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-21 17:06:14,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 195 transitions, 1336 flow. Second operand has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:14,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:14,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-21 17:06:14,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:15,306 INFO L130 PetriNetUnfolder]: 568/3252 cut-off events. [2022-11-21 17:06:15,306 INFO L131 PetriNetUnfolder]: For 14662/14907 co-relation queries the response was YES. [2022-11-21 17:06:15,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10173 conditions, 3252 events. 568/3252 cut-off events. For 14662/14907 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 31955 event pairs, 95 based on Foata normal form. 192/3320 useless extension candidates. Maximal degree in co-relation 10048. Up to 524 conditions per place. [2022-11-21 17:06:15,331 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 50 selfloop transitions, 9 changer transitions 0/204 dead transitions. [2022-11-21 17:06:15,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 204 transitions, 1406 flow [2022-11-21 17:06:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:06:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 17:06:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2022-11-21 17:06:15,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.852112676056338 [2022-11-21 17:06:15,333 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2022-11-21 17:06:15,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2022-11-21 17:06:15,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:15,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2022-11-21 17:06:15,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:15,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:15,336 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:15,336 INFO L175 Difference]: Start difference. First operand has 223 places, 195 transitions, 1336 flow. Second operand 5 states and 605 transitions. [2022-11-21 17:06:15,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 204 transitions, 1406 flow [2022-11-21 17:06:15,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 204 transitions, 1360 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-11-21 17:06:15,363 INFO L231 Difference]: Finished difference. Result has 219 places, 179 transitions, 1081 flow [2022-11-21 17:06:15,364 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1081, PETRI_PLACES=219, PETRI_TRANSITIONS=179} [2022-11-21 17:06:15,364 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 99 predicate places. [2022-11-21 17:06:15,365 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 179 transitions, 1081 flow [2022-11-21 17:06:15,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:15,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:15,366 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] [2022-11-21 17:06:15,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 17:06:15,366 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -377995027, now seen corresponding path program 2 times [2022-11-21 17:06:15,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:15,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264508229] [2022-11-21 17:06:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:15,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:16,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:16,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264508229] [2022-11-21 17:06:16,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264508229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:16,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733562435] [2022-11-21 17:06:16,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:06:16,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:16,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:16,159 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:16,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 17:06:16,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:06:16,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:06:16,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 17:06:16,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:16,532 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 [2022-11-21 17:06:16,730 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 17:06:16,730 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 [2022-11-21 17:06:16,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:06:16,969 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 [2022-11-21 17:06:17,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:06:17,082 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 [2022-11-21 17:06:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:17,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:17,160 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_421) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 4294967295)) is different from false [2022-11-21 17:06:17,182 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_421) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-21 17:06:17,193 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int)) (v_ArrVal_420 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_420) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_421) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-21 17:06:17,314 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int)) (v_ArrVal_420 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_420) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_421) |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 [2022-11-21 17:06:19,769 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_418 Int) (v_ArrVal_421 (Array Int Int)) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_40| Int) (v_ArrVal_420 (Array Int Int))) (or (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_40| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)) (<= (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_40| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_418)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_420) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_421) |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 [2022-11-21 17:06:19,805 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-21 17:06:19,805 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 [2022-11-21 17:06:19,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:06:19,816 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 [2022-11-21 17:06:19,821 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 98 [2022-11-21 17:06:19,826 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 98 treesize of output 94 [2022-11-21 17:06:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-21 17:06:20,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733562435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:20,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:20,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-11-21 17:06:20,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791298109] [2022-11-21 17:06:20,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:20,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 17:06:20,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:20,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 17:06:20,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1700, Unknown=32, NotChecked=440, Total=2352 [2022-11-21 17:06:20,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 142 [2022-11-21 17:06:20,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 179 transitions, 1081 flow. Second operand has 49 states, 49 states have (on average 74.40816326530613) internal successors, (3646), 49 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:20,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:20,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 142 [2022-11-21 17:06:20,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:23,915 INFO L130 PetriNetUnfolder]: 2292/7584 cut-off events. [2022-11-21 17:06:23,915 INFO L131 PetriNetUnfolder]: For 22022/22335 co-relation queries the response was YES. [2022-11-21 17:06:23,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23628 conditions, 7584 events. 2292/7584 cut-off events. For 22022/22335 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 77989 event pairs, 979 based on Foata normal form. 136/7206 useless extension candidates. Maximal degree in co-relation 23481. Up to 1546 conditions per place. [2022-11-21 17:06:23,999 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 91 selfloop transitions, 44 changer transitions 0/205 dead transitions. [2022-11-21 17:06:24,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 205 transitions, 1499 flow [2022-11-21 17:06:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:06:24,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 17:06:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1591 transitions. [2022-11-21 17:06:24,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5335345405767941 [2022-11-21 17:06:24,003 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1591 transitions. [2022-11-21 17:06:24,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1591 transitions. [2022-11-21 17:06:24,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:24,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1591 transitions. [2022-11-21 17:06:24,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.76190476190476) internal successors, (1591), 21 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:24,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:24,011 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:24,011 INFO L175 Difference]: Start difference. First operand has 219 places, 179 transitions, 1081 flow. Second operand 21 states and 1591 transitions. [2022-11-21 17:06:24,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 205 transitions, 1499 flow [2022-11-21 17:06:24,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 205 transitions, 1471 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 17:06:24,088 INFO L231 Difference]: Finished difference. Result has 237 places, 180 transitions, 1193 flow [2022-11-21 17:06:24,088 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1193, PETRI_PLACES=237, PETRI_TRANSITIONS=180} [2022-11-21 17:06:24,089 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 117 predicate places. [2022-11-21 17:06:24,089 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 180 transitions, 1193 flow [2022-11-21 17:06:24,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 74.40816326530613) internal successors, (3646), 49 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:24,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:24,090 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, 1] [2022-11-21 17:06:24,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 17:06:24,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-21 17:06:24,291 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:24,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1349062722, now seen corresponding path program 1 times [2022-11-21 17:06:24,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:24,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167051581] [2022-11-21 17:06:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:24,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:24,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:24,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167051581] [2022-11-21 17:06:24,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167051581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:24,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030378651] [2022-11-21 17:06:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:24,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:24,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:24,475 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:24,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 17:06:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:24,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 17:06:24,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:24,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:25,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030378651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:25,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:25,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-21 17:06:25,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52756649] [2022-11-21 17:06:25,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:25,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 17:06:25,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 17:06:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-21 17:06:25,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 142 [2022-11-21 17:06:25,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 180 transitions, 1193 flow. Second operand has 24 states, 24 states have (on average 88.875) internal successors, (2133), 24 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:25,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:25,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 142 [2022-11-21 17:06:25,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:26,357 INFO L130 PetriNetUnfolder]: 1655/4939 cut-off events. [2022-11-21 17:06:26,357 INFO L131 PetriNetUnfolder]: For 19602/19737 co-relation queries the response was YES. [2022-11-21 17:06:26,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17233 conditions, 4939 events. 1655/4939 cut-off events. For 19602/19737 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 43984 event pairs, 964 based on Foata normal form. 38/4613 useless extension candidates. Maximal degree in co-relation 17083. Up to 2957 conditions per place. [2022-11-21 17:06:26,405 INFO L137 encePairwiseOnDemand]: 126/142 looper letters, 64 selfloop transitions, 14 changer transitions 61/226 dead transitions. [2022-11-21 17:06:26,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 226 transitions, 1717 flow [2022-11-21 17:06:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 17:06:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-21 17:06:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1558 transitions. [2022-11-21 17:06:26,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6454018227009114 [2022-11-21 17:06:26,407 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1558 transitions. [2022-11-21 17:06:26,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1558 transitions. [2022-11-21 17:06:26,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:26,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1558 transitions. [2022-11-21 17:06:26,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.6470588235294) internal successors, (1558), 17 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:26,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:26,414 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:26,414 INFO L175 Difference]: Start difference. First operand has 237 places, 180 transitions, 1193 flow. Second operand 17 states and 1558 transitions. [2022-11-21 17:06:26,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 226 transitions, 1717 flow [2022-11-21 17:06:26,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 226 transitions, 1648 flow, removed 2 selfloop flow, removed 19 redundant places. [2022-11-21 17:06:26,466 INFO L231 Difference]: Finished difference. Result has 235 places, 153 transitions, 889 flow [2022-11-21 17:06:26,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=889, PETRI_PLACES=235, PETRI_TRANSITIONS=153} [2022-11-21 17:06:26,467 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 115 predicate places. [2022-11-21 17:06:26,467 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 153 transitions, 889 flow [2022-11-21 17:06:26,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 88.875) internal successors, (2133), 24 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:26,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:26,485 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] [2022-11-21 17:06:26,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-21 17:06:26,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-21 17:06:26,686 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:26,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:26,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1704682216, now seen corresponding path program 2 times [2022-11-21 17:06:26,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:26,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237931689] [2022-11-21 17:06:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:26,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:27,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:27,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237931689] [2022-11-21 17:06:27,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237931689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:27,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126344694] [2022-11-21 17:06:27,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:06:27,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:27,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:27,455 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:27,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 17:06:27,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:06:27,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:06:27,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 17:06:27,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:27,863 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 [2022-11-21 17:06:28,074 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 17:06:28,074 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 [2022-11-21 17:06:28,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:06:28,320 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 [2022-11-21 17:06:28,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:06:28,446 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 [2022-11-21 17:06:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:28,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:28,530 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_479 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_479) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 9223372039002259456))) is different from false [2022-11-21 17:06:28,683 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_479 (Array Int Int)) (v_ArrVal_478 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_478) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_479) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456))) is different from false [2022-11-21 17:06:31,428 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-21 17:06:31,429 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 [2022-11-21 17:06:31,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:06:31,440 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 142 treesize of output 136 [2022-11-21 17:06:31,445 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 122 treesize of output 118 [2022-11-21 17:06:31,451 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 [2022-11-21 17:06:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:33,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126344694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:33,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:33,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-11-21 17:06:33,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730525295] [2022-11-21 17:06:33,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:33,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 17:06:33,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:33,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 17:06:33,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1931, Unknown=48, NotChecked=182, Total=2352 [2022-11-21 17:06:33,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 142 [2022-11-21 17:06:33,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 153 transitions, 889 flow. Second operand has 49 states, 49 states have (on average 74.40816326530613) internal successors, (3646), 49 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:33,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:33,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 142 [2022-11-21 17:06:33,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:37,336 INFO L130 PetriNetUnfolder]: 2077/6431 cut-off events. [2022-11-21 17:06:37,336 INFO L131 PetriNetUnfolder]: For 23174/23423 co-relation queries the response was YES. [2022-11-21 17:06:37,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21196 conditions, 6431 events. 2077/6431 cut-off events. For 23174/23423 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 63441 event pairs, 1089 based on Foata normal form. 75/6164 useless extension candidates. Maximal degree in co-relation 21152. Up to 1464 conditions per place. [2022-11-21 17:06:37,412 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 71 selfloop transitions, 35 changer transitions 0/172 dead transitions. [2022-11-21 17:06:37,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 172 transitions, 1189 flow [2022-11-21 17:06:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:06:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 17:06:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1590 transitions. [2022-11-21 17:06:37,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5331991951710262 [2022-11-21 17:06:37,415 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1590 transitions. [2022-11-21 17:06:37,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1590 transitions. [2022-11-21 17:06:37,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:37,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1590 transitions. [2022-11-21 17:06:37,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.71428571428571) internal successors, (1590), 21 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:37,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:37,420 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:37,420 INFO L175 Difference]: Start difference. First operand has 235 places, 153 transitions, 889 flow. Second operand 21 states and 1590 transitions. [2022-11-21 17:06:37,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 172 transitions, 1189 flow [2022-11-21 17:06:37,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 172 transitions, 1027 flow, removed 17 selfloop flow, removed 29 redundant places. [2022-11-21 17:06:37,469 INFO L231 Difference]: Finished difference. Result has 205 places, 152 transitions, 816 flow [2022-11-21 17:06:37,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=816, PETRI_PLACES=205, PETRI_TRANSITIONS=152} [2022-11-21 17:06:37,469 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 85 predicate places. [2022-11-21 17:06:37,469 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 152 transitions, 816 flow [2022-11-21 17:06:37,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 74.40816326530613) internal successors, (3646), 49 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:37,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:37,470 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] [2022-11-21 17:06:37,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 17:06:37,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-21 17:06:37,678 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:37,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:37,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1772825951, now seen corresponding path program 2 times [2022-11-21 17:06:37,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:37,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544694968] [2022-11-21 17:06:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:37,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:38,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:38,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544694968] [2022-11-21 17:06:38,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544694968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:38,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397838092] [2022-11-21 17:06:38,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:06:38,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:38,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:38,428 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:38,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 17:06:38,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:06:38,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:06:38,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 17:06:38,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:38,799 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 [2022-11-21 17:06:38,989 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 17:06:38,989 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 [2022-11-21 17:06:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:06:39,231 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 [2022-11-21 17:06:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:06:39,301 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 [2022-11-21 17:06:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:39,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:41,738 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-21 17:06:41,739 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 [2022-11-21 17:06:41,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:06:41,748 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 142 treesize of output 136 [2022-11-21 17:06:41,753 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 122 treesize of output 114 [2022-11-21 17:06:41,758 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 114 treesize of output 110 [2022-11-21 17:06:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:44,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397838092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:44,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:44,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-21 17:06:44,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281560598] [2022-11-21 17:06:44,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:44,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 17:06:44,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:44,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 17:06:44,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2007, Unknown=49, NotChecked=0, Total=2256 [2022-11-21 17:06:44,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 142 [2022-11-21 17:06:44,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 152 transitions, 816 flow. Second operand has 48 states, 48 states have (on average 77.39583333333333) internal successors, (3715), 48 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:44,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:44,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 142 [2022-11-21 17:06:44,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:47,039 INFO L130 PetriNetUnfolder]: 2266/6053 cut-off events. [2022-11-21 17:06:47,039 INFO L131 PetriNetUnfolder]: For 24679/25282 co-relation queries the response was YES. [2022-11-21 17:06:47,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19837 conditions, 6053 events. 2266/6053 cut-off events. For 24679/25282 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 56963 event pairs, 483 based on Foata normal form. 18/5510 useless extension candidates. Maximal degree in co-relation 19807. Up to 1584 conditions per place. [2022-11-21 17:06:47,095 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 71 selfloop transitions, 28 changer transitions 0/173 dead transitions. [2022-11-21 17:06:47,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 173 transitions, 1160 flow [2022-11-21 17:06:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:06:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 17:06:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1649 transitions. [2022-11-21 17:06:47,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5529845741113347 [2022-11-21 17:06:47,098 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1649 transitions. [2022-11-21 17:06:47,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1649 transitions. [2022-11-21 17:06:47,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:47,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1649 transitions. [2022-11-21 17:06:47,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.52380952380952) internal successors, (1649), 21 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:47,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:47,107 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:47,107 INFO L175 Difference]: Start difference. First operand has 205 places, 152 transitions, 816 flow. Second operand 21 states and 1649 transitions. [2022-11-21 17:06:47,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 173 transitions, 1160 flow [2022-11-21 17:06:47,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 173 transitions, 1099 flow, removed 3 selfloop flow, removed 19 redundant places. [2022-11-21 17:06:47,135 INFO L231 Difference]: Finished difference. Result has 208 places, 153 transitions, 829 flow [2022-11-21 17:06:47,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=829, PETRI_PLACES=208, PETRI_TRANSITIONS=153} [2022-11-21 17:06:47,135 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 88 predicate places. [2022-11-21 17:06:47,136 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 153 transitions, 829 flow [2022-11-21 17:06:47,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 77.39583333333333) internal successors, (3715), 48 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:47,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:47,137 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] [2022-11-21 17:06:47,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 17:06:47,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:47,338 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:47,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1772825954, now seen corresponding path program 2 times [2022-11-21 17:06:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:47,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251447610] [2022-11-21 17:06:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:47,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:48,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:48,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251447610] [2022-11-21 17:06:48,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251447610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:48,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367105714] [2022-11-21 17:06:48,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:06:48,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:48,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:48,132 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:48,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 17:06:48,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:06:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:06:48,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 17:06:48,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:48,518 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 [2022-11-21 17:06:48,721 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 17:06:48,721 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 [2022-11-21 17:06:48,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:06:48,947 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 [2022-11-21 17:06:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:06:49,008 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 [2022-11-21 17:06:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:49,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:49,371 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_546 (Array Int Int)) (v_ArrVal_547 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_546) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_547) |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 [2022-11-21 17:06:51,791 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-21 17:06:51,791 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 [2022-11-21 17:06:51,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:06:51,800 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 [2022-11-21 17:06:51,804 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 [2022-11-21 17:06:51,809 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 [2022-11-21 17:06:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:54,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367105714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:54,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:54,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-21 17:06:54,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737813764] [2022-11-21 17:06:54,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:54,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 17:06:54,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:54,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 17:06:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1946, Unknown=22, NotChecked=90, Total=2256 [2022-11-21 17:06:54,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 142 [2022-11-21 17:06:54,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 153 transitions, 829 flow. Second operand has 48 states, 48 states have (on average 77.39583333333333) internal successors, (3715), 48 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:54,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:54,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 142 [2022-11-21 17:06:54,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:06:57,218 INFO L130 PetriNetUnfolder]: 2008/5783 cut-off events. [2022-11-21 17:06:57,218 INFO L131 PetriNetUnfolder]: For 21904/22189 co-relation queries the response was YES. [2022-11-21 17:06:57,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19097 conditions, 5783 events. 2008/5783 cut-off events. For 21904/22189 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 56404 event pairs, 549 based on Foata normal form. 72/5438 useless extension candidates. Maximal degree in co-relation 19066. Up to 1551 conditions per place. [2022-11-21 17:06:57,272 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 70 selfloop transitions, 28 changer transitions 0/172 dead transitions. [2022-11-21 17:06:57,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 172 transitions, 1161 flow [2022-11-21 17:06:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:06:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 17:06:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1648 transitions. [2022-11-21 17:06:57,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5526492287055668 [2022-11-21 17:06:57,275 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1648 transitions. [2022-11-21 17:06:57,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1648 transitions. [2022-11-21 17:06:57,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:06:57,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1648 transitions. [2022-11-21 17:06:57,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.47619047619048) internal successors, (1648), 21 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:57,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:57,283 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:57,283 INFO L175 Difference]: Start difference. First operand has 208 places, 153 transitions, 829 flow. Second operand 21 states and 1648 transitions. [2022-11-21 17:06:57,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 172 transitions, 1161 flow [2022-11-21 17:06:57,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 172 transitions, 1108 flow, removed 0 selfloop flow, removed 19 redundant places. [2022-11-21 17:06:57,320 INFO L231 Difference]: Finished difference. Result has 209 places, 152 transitions, 828 flow [2022-11-21 17:06:57,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=828, PETRI_PLACES=209, PETRI_TRANSITIONS=152} [2022-11-21 17:06:57,322 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 89 predicate places. [2022-11-21 17:06:57,322 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 152 transitions, 828 flow [2022-11-21 17:06:57,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 77.39583333333333) internal successors, (3715), 48 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:57,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:06:57,323 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] [2022-11-21 17:06:57,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 17:06:57,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-21 17:06:57,530 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:06:57,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:57,530 INFO L85 PathProgramCache]: Analyzing trace with hash 965574777, now seen corresponding path program 2 times [2022-11-21 17:06:57,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:57,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626736408] [2022-11-21 17:06:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:57,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:06:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:58,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:58,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626736408] [2022-11-21 17:06:58,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626736408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:58,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995687604] [2022-11-21 17:06:58,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:06:58,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:58,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:58,436 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:58,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 17:06:58,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:06:58,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:06:58,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 17:06:58,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:58,842 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 [2022-11-21 17:06:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:06:59,033 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 [2022-11-21 17:06:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:06:59,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:59,332 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_574) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-21 17:06:59,493 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_574) |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 [2022-11-21 17:06:59,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:06:59,523 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 [2022-11-21 17:06:59,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:06:59,533 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 [2022-11-21 17:06:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-21 17:06:59,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995687604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:59,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:06:59,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-11-21 17:06:59,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894752550] [2022-11-21 17:06:59,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:59,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-21 17:06:59,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:59,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-21 17:06:59,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1803, Unknown=15, NotChecked=174, Total=2162 [2022-11-21 17:06:59,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 142 [2022-11-21 17:06:59,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 152 transitions, 828 flow. Second operand has 47 states, 47 states have (on average 74.76595744680851) internal successors, (3514), 47 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:06:59,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:06:59,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 142 [2022-11-21 17:06:59,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:07:03,599 INFO L130 PetriNetUnfolder]: 2743/7097 cut-off events. [2022-11-21 17:07:03,599 INFO L131 PetriNetUnfolder]: For 16064/16552 co-relation queries the response was YES. [2022-11-21 17:07:03,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22666 conditions, 7097 events. 2743/7097 cut-off events. For 16064/16552 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 69562 event pairs, 1483 based on Foata normal form. 379/6719 useless extension candidates. Maximal degree in co-relation 22636. Up to 3010 conditions per place. [2022-11-21 17:07:03,656 INFO L137 encePairwiseOnDemand]: 119/142 looper letters, 110 selfloop transitions, 51 changer transitions 0/224 dead transitions. [2022-11-21 17:07:03,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 224 transitions, 1572 flow [2022-11-21 17:07:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 17:07:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-21 17:07:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2003 transitions. [2022-11-21 17:07:03,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5425243770314193 [2022-11-21 17:07:03,660 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2003 transitions. [2022-11-21 17:07:03,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2003 transitions. [2022-11-21 17:07:03,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:07:03,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2003 transitions. [2022-11-21 17:07:03,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 77.03846153846153) internal successors, (2003), 26 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:03,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:03,667 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:03,668 INFO L175 Difference]: Start difference. First operand has 209 places, 152 transitions, 828 flow. Second operand 26 states and 2003 transitions. [2022-11-21 17:07:03,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 224 transitions, 1572 flow [2022-11-21 17:07:03,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 224 transitions, 1512 flow, removed 2 selfloop flow, removed 19 redundant places. [2022-11-21 17:07:03,705 INFO L231 Difference]: Finished difference. Result has 226 places, 181 transitions, 1196 flow [2022-11-21 17:07:03,705 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1196, PETRI_PLACES=226, PETRI_TRANSITIONS=181} [2022-11-21 17:07:03,706 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 106 predicate places. [2022-11-21 17:07:03,706 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 181 transitions, 1196 flow [2022-11-21 17:07:03,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 74.76595744680851) internal successors, (3514), 47 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:03,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:07:03,707 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] [2022-11-21 17:07:03,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 17:07:03,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:03,907 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:07:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:07:03,908 INFO L85 PathProgramCache]: Analyzing trace with hash 965574774, now seen corresponding path program 1 times [2022-11-21 17:07:03,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:07:03,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10005652] [2022-11-21 17:07:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:03,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:07:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:04,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:07:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10005652] [2022-11-21 17:07:04,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10005652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:07:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336189707] [2022-11-21 17:07:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:04,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:04,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:07:04,655 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:07:04,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 17:07:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 17:07:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:07:05,002 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 [2022-11-21 17:07:05,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:07:05,187 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 [2022-11-21 17:07:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:05,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:07:05,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:07:05,816 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 [2022-11-21 17:07:05,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:07:05,824 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 [2022-11-21 17:07:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:06,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336189707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:07:06,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:07:06,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-11-21 17:07:06,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131164480] [2022-11-21 17:07:06,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:07:06,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-21 17:07:06,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:07:06,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-21 17:07:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1955, Unknown=32, NotChecked=0, Total=2162 [2022-11-21 17:07:06,163 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 142 [2022-11-21 17:07:06,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 181 transitions, 1196 flow. Second operand has 47 states, 47 states have (on average 74.76595744680851) internal successors, (3514), 47 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:06,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:07:06,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 142 [2022-11-21 17:07:06,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:07:09,852 INFO L130 PetriNetUnfolder]: 2742/7095 cut-off events. [2022-11-21 17:07:09,852 INFO L131 PetriNetUnfolder]: For 17412/17901 co-relation queries the response was YES. [2022-11-21 17:07:09,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22733 conditions, 7095 events. 2742/7095 cut-off events. For 17412/17901 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 69531 event pairs, 1483 based on Foata normal form. 382/6720 useless extension candidates. Maximal degree in co-relation 22693. Up to 3009 conditions per place. [2022-11-21 17:07:09,918 INFO L137 encePairwiseOnDemand]: 119/142 looper letters, 109 selfloop transitions, 50 changer transitions 0/222 dead transitions. [2022-11-21 17:07:09,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 222 transitions, 1661 flow [2022-11-21 17:07:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 17:07:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-21 17:07:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2002 transitions. [2022-11-21 17:07:09,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5422535211267606 [2022-11-21 17:07:09,922 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2002 transitions. [2022-11-21 17:07:09,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2002 transitions. [2022-11-21 17:07:09,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:07:09,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2002 transitions. [2022-11-21 17:07:09,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 77.0) internal successors, (2002), 26 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:09,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:09,931 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:09,932 INFO L175 Difference]: Start difference. First operand has 226 places, 181 transitions, 1196 flow. Second operand 26 states and 2002 transitions. [2022-11-21 17:07:09,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 222 transitions, 1661 flow [2022-11-21 17:07:09,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 222 transitions, 1606 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-11-21 17:07:09,977 INFO L231 Difference]: Finished difference. Result has 241 places, 180 transitions, 1230 flow [2022-11-21 17:07:09,978 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1230, PETRI_PLACES=241, PETRI_TRANSITIONS=180} [2022-11-21 17:07:09,978 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 121 predicate places. [2022-11-21 17:07:09,978 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 180 transitions, 1230 flow [2022-11-21 17:07:09,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 74.76595744680851) internal successors, (3514), 47 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:09,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:07:09,980 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, 1] [2022-11-21 17:07:09,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 17:07:10,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-21 17:07:10,186 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:07:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:07:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2042862662, now seen corresponding path program 1 times [2022-11-21 17:07:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:07:10,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217261738] [2022-11-21 17:07:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:10,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:07:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 17:07:10,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:07:10,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217261738] [2022-11-21 17:07:10,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217261738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:07:10,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367635975] [2022-11-21 17:07:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:10,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:10,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:07:10,268 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:07:10,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 17:07:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:10,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 17:07:10,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:07:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 17:07:10,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:07:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 17:07:10,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367635975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:07:10,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:07:10,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 17:07:10,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640835978] [2022-11-21 17:07:10,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:07:10,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:07:10,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:07:10,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:07:10,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:07:10,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-21 17:07:10,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 180 transitions, 1230 flow. Second operand has 12 states, 12 states have (on average 109.66666666666667) internal successors, (1316), 12 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:10,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:07:10,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-21 17:07:10,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:07:12,400 INFO L130 PetriNetUnfolder]: 2605/8347 cut-off events. [2022-11-21 17:07:12,400 INFO L131 PetriNetUnfolder]: For 26494/27200 co-relation queries the response was YES. [2022-11-21 17:07:12,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28246 conditions, 8347 events. 2605/8347 cut-off events. For 26494/27200 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 89005 event pairs, 296 based on Foata normal form. 659/8391 useless extension candidates. Maximal degree in co-relation 28206. Up to 1302 conditions per place. [2022-11-21 17:07:12,477 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 156 selfloop transitions, 34 changer transitions 0/324 dead transitions. [2022-11-21 17:07:12,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 324 transitions, 2648 flow [2022-11-21 17:07:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 17:07:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 17:07:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2056 transitions. [2022-11-21 17:07:12,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8043818466353677 [2022-11-21 17:07:12,481 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2056 transitions. [2022-11-21 17:07:12,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2056 transitions. [2022-11-21 17:07:12,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:07:12,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2056 transitions. [2022-11-21 17:07:12,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 114.22222222222223) internal successors, (2056), 18 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:12,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:12,488 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:12,488 INFO L175 Difference]: Start difference. First operand has 241 places, 180 transitions, 1230 flow. Second operand 18 states and 2056 transitions. [2022-11-21 17:07:12,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 324 transitions, 2648 flow [2022-11-21 17:07:12,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 324 transitions, 2525 flow, removed 8 selfloop flow, removed 23 redundant places. [2022-11-21 17:07:12,525 INFO L231 Difference]: Finished difference. Result has 239 places, 200 transitions, 1467 flow [2022-11-21 17:07:12,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1467, PETRI_PLACES=239, PETRI_TRANSITIONS=200} [2022-11-21 17:07:12,526 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 119 predicate places. [2022-11-21 17:07:12,526 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 200 transitions, 1467 flow [2022-11-21 17:07:12,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 109.66666666666667) internal successors, (1316), 12 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:12,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:07:12,527 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] [2022-11-21 17:07:12,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 17:07:12,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-21 17:07:12,729 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:07:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:07:12,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1786961977, now seen corresponding path program 2 times [2022-11-21 17:07:12,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:07:12,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062243419] [2022-11-21 17:07:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:12,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:07:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:12,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:07:12,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062243419] [2022-11-21 17:07:12,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062243419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:07:12,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505017755] [2022-11-21 17:07:12,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:07:12,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:12,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:07:12,880 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:07:12,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 17:07:13,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 17:07:13,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:07:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 17:07:13,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:07:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 17:07:13,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:07:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 17:07:13,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505017755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:07:13,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:07:13,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-21 17:07:13,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756723475] [2022-11-21 17:07:13,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:07:13,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:07:13,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:07:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:07:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:07:13,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 142 [2022-11-21 17:07:13,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 200 transitions, 1467 flow. Second operand has 18 states, 18 states have (on average 94.61111111111111) internal successors, (1703), 18 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:13,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:07:13,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 142 [2022-11-21 17:07:13,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:07:16,152 INFO L130 PetriNetUnfolder]: 2889/12686 cut-off events. [2022-11-21 17:07:16,152 INFO L131 PetriNetUnfolder]: For 45093/45366 co-relation queries the response was YES. [2022-11-21 17:07:16,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40884 conditions, 12686 events. 2889/12686 cut-off events. For 45093/45366 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 145949 event pairs, 1906 based on Foata normal form. 23/12313 useless extension candidates. Maximal degree in co-relation 40842. Up to 1115 conditions per place. [2022-11-21 17:07:16,299 INFO L137 encePairwiseOnDemand]: 131/142 looper letters, 141 selfloop transitions, 25 changer transitions 0/303 dead transitions. [2022-11-21 17:07:16,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 303 transitions, 2539 flow [2022-11-21 17:07:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 17:07:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-21 17:07:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2311 transitions. [2022-11-21 17:07:16,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6781103286384976 [2022-11-21 17:07:16,302 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2311 transitions. [2022-11-21 17:07:16,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2311 transitions. [2022-11-21 17:07:16,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:07:16,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2311 transitions. [2022-11-21 17:07:16,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.29166666666667) internal successors, (2311), 24 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:16,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 142.0) internal successors, (3550), 25 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:16,311 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 142.0) internal successors, (3550), 25 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:16,311 INFO L175 Difference]: Start difference. First operand has 239 places, 200 transitions, 1467 flow. Second operand 24 states and 2311 transitions. [2022-11-21 17:07:16,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 303 transitions, 2539 flow [2022-11-21 17:07:16,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 303 transitions, 2449 flow, removed 27 selfloop flow, removed 9 redundant places. [2022-11-21 17:07:16,405 INFO L231 Difference]: Finished difference. Result has 253 places, 204 transitions, 1454 flow [2022-11-21 17:07:16,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1454, PETRI_PLACES=253, PETRI_TRANSITIONS=204} [2022-11-21 17:07:16,406 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 133 predicate places. [2022-11-21 17:07:16,406 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 204 transitions, 1454 flow [2022-11-21 17:07:16,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.61111111111111) internal successors, (1703), 18 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:16,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:07:16,407 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:07:16,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-21 17:07:16,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:16,611 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:07:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:07:16,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1095766306, now seen corresponding path program 1 times [2022-11-21 17:07:16,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:07:16,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627560035] [2022-11-21 17:07:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:16,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:07:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 17:07:16,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:07:16,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627560035] [2022-11-21 17:07:16,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627560035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:07:16,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788936755] [2022-11-21 17:07:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:16,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:16,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:07:16,706 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:07:16,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 17:07:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:16,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 17:07:16,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:07:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 17:07:16,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:07:16,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788936755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:07:16,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:07:16,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 17:07:16,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598717946] [2022-11-21 17:07:16,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:07:16,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:07:16,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:07:16,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:07:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 17:07:16,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-21 17:07:16,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 204 transitions, 1454 flow. Second operand has 6 states, 6 states have (on average 109.33333333333333) internal successors, (656), 6 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:16,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:07:16,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-21 17:07:16,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:07:19,403 INFO L130 PetriNetUnfolder]: 3952/12736 cut-off events. [2022-11-21 17:07:19,404 INFO L131 PetriNetUnfolder]: For 41086/42011 co-relation queries the response was YES. [2022-11-21 17:07:19,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44138 conditions, 12736 events. 3952/12736 cut-off events. For 41086/42011 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 142789 event pairs, 449 based on Foata normal form. 1127/12882 useless extension candidates. Maximal degree in co-relation 44100. Up to 3540 conditions per place. [2022-11-21 17:07:19,530 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 74 selfloop transitions, 18 changer transitions 0/230 dead transitions. [2022-11-21 17:07:19,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 230 transitions, 1770 flow [2022-11-21 17:07:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:07:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 17:07:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 797 transitions. [2022-11-21 17:07:19,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8018108651911469 [2022-11-21 17:07:19,533 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 797 transitions. [2022-11-21 17:07:19,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 797 transitions. [2022-11-21 17:07:19,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:07:19,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 797 transitions. [2022-11-21 17:07:19,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:19,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:19,537 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:19,537 INFO L175 Difference]: Start difference. First operand has 253 places, 204 transitions, 1454 flow. Second operand 7 states and 797 transitions. [2022-11-21 17:07:19,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 230 transitions, 1770 flow [2022-11-21 17:07:19,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 230 transitions, 1717 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-21 17:07:19,626 INFO L231 Difference]: Finished difference. Result has 237 places, 200 transitions, 1418 flow [2022-11-21 17:07:19,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1418, PETRI_PLACES=237, PETRI_TRANSITIONS=200} [2022-11-21 17:07:19,627 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 117 predicate places. [2022-11-21 17:07:19,628 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 200 transitions, 1418 flow [2022-11-21 17:07:19,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.33333333333333) internal successors, (656), 6 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:19,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:07:19,628 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] [2022-11-21 17:07:19,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-21 17:07:19,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-21 17:07:19,835 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:07:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:07:19,835 INFO L85 PathProgramCache]: Analyzing trace with hash -466319177, now seen corresponding path program 1 times [2022-11-21 17:07:19,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:07:19,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120067137] [2022-11-21 17:07:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:19,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:07:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:20,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:07:20,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120067137] [2022-11-21 17:07:20,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120067137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:07:20,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141266152] [2022-11-21 17:07:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:20,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:20,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:07:20,756 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:07:20,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-21 17:07:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:20,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 17:07:20,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:07:21,325 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 [2022-11-21 17:07:21,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:07:21,577 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 [2022-11-21 17:07:21,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:07:21,707 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 [2022-11-21 17:07:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:21,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:07:21,972 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_713) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-21 17:07:22,143 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_712 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_712) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 4294967295)) is different from false [2022-11-21 17:07:22,154 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_712 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_712) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 4294967295)) is different from false [2022-11-21 17:07:22,164 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_712 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_712) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_713) |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 [2022-11-21 17:07:22,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:07:22,196 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 [2022-11-21 17:07:22,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:07:22,207 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 [2022-11-21 17:07:22,212 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 [2022-11-21 17:07:22,218 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 [2022-11-21 17:07:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-11-21 17:07:22,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141266152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:07:22,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:07:22,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-11-21 17:07:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377570862] [2022-11-21 17:07:22,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:07:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 17:07:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:07:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 17:07:22,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2170, Unknown=16, NotChecked=388, Total=2756 [2022-11-21 17:07:22,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 142 [2022-11-21 17:07:22,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 200 transitions, 1418 flow. Second operand has 53 states, 53 states have (on average 69.62264150943396) internal successors, (3690), 53 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:22,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:07:22,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 142 [2022-11-21 17:07:22,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:07:33,264 INFO L130 PetriNetUnfolder]: 11648/31382 cut-off events. [2022-11-21 17:07:33,264 INFO L131 PetriNetUnfolder]: For 89324/91062 co-relation queries the response was YES. [2022-11-21 17:07:33,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102260 conditions, 31382 events. 11648/31382 cut-off events. For 89324/91062 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 368328 event pairs, 5134 based on Foata normal form. 1383/30298 useless extension candidates. Maximal degree in co-relation 102222. Up to 10096 conditions per place. [2022-11-21 17:07:33,625 INFO L137 encePairwiseOnDemand]: 118/142 looper letters, 191 selfloop transitions, 66 changer transitions 0/317 dead transitions. [2022-11-21 17:07:33,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 317 transitions, 2666 flow [2022-11-21 17:07:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 17:07:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-21 17:07:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1910 transitions. [2022-11-21 17:07:33,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5173347778981582 [2022-11-21 17:07:33,628 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1910 transitions. [2022-11-21 17:07:33,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1910 transitions. [2022-11-21 17:07:33,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:07:33,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1910 transitions. [2022-11-21 17:07:33,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.46153846153847) internal successors, (1910), 26 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:33,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:33,635 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:33,636 INFO L175 Difference]: Start difference. First operand has 237 places, 200 transitions, 1418 flow. Second operand 26 states and 1910 transitions. [2022-11-21 17:07:33,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 317 transitions, 2666 flow [2022-11-21 17:07:33,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 317 transitions, 2617 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 17:07:33,846 INFO L231 Difference]: Finished difference. Result has 263 places, 219 transitions, 1854 flow [2022-11-21 17:07:33,846 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1854, PETRI_PLACES=263, PETRI_TRANSITIONS=219} [2022-11-21 17:07:33,847 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 143 predicate places. [2022-11-21 17:07:33,847 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 219 transitions, 1854 flow [2022-11-21 17:07:33,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 69.62264150943396) internal successors, (3690), 53 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:33,848 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:07:33,848 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] [2022-11-21 17:07:33,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-21 17:07:34,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-21 17:07:34,049 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:07:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:07:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2010991640, now seen corresponding path program 1 times [2022-11-21 17:07:34,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:07:34,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730362071] [2022-11-21 17:07:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:34,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:07:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:34,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:07:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730362071] [2022-11-21 17:07:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730362071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:07:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185668820] [2022-11-21 17:07:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:34,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:34,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:07:34,958 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:07:34,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-21 17:07:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:35,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-21 17:07:35,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:07:35,443 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 [2022-11-21 17:07:35,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:07:35,720 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 [2022-11-21 17:07:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:07:35,838 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 [2022-11-21 17:07:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:35,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:07:36,173 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_745 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_745) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-21 17:07:38,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:07:38,058 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 [2022-11-21 17:07:38,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:07:38,067 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 [2022-11-21 17:07:38,074 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 67 treesize of output 59 [2022-11-21 17:07:38,080 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 [2022-11-21 17:07:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:38,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185668820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:07:38,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:07:38,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-21 17:07:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124639823] [2022-11-21 17:07:38,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:07:38,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-21 17:07:38,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:07:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-21 17:07:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2339, Unknown=34, NotChecked=98, Total=2652 [2022-11-21 17:07:38,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 142 [2022-11-21 17:07:38,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 219 transitions, 1854 flow. Second operand has 52 states, 52 states have (on average 72.5576923076923) internal successors, (3773), 52 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:38,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:07:38,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 142 [2022-11-21 17:07:38,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:07:49,821 INFO L130 PetriNetUnfolder]: 11617/31330 cut-off events. [2022-11-21 17:07:49,821 INFO L131 PetriNetUnfolder]: For 105699/107433 co-relation queries the response was YES. [2022-11-21 17:07:50,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104050 conditions, 31330 events. 11617/31330 cut-off events. For 105699/107433 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 367867 event pairs, 5134 based on Foata normal form. 1379/30251 useless extension candidates. Maximal degree in co-relation 104006. Up to 10096 conditions per place. [2022-11-21 17:07:50,357 INFO L137 encePairwiseOnDemand]: 118/142 looper letters, 187 selfloop transitions, 66 changer transitions 0/316 dead transitions. [2022-11-21 17:07:50,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 316 transitions, 2808 flow [2022-11-21 17:07:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 17:07:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-21 17:07:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1984 transitions. [2022-11-21 17:07:50,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5373781148429035 [2022-11-21 17:07:50,361 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1984 transitions. [2022-11-21 17:07:50,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1984 transitions. [2022-11-21 17:07:50,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:07:50,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1984 transitions. [2022-11-21 17:07:50,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 76.3076923076923) internal successors, (1984), 26 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:50,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:50,371 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:50,371 INFO L175 Difference]: Start difference. First operand has 263 places, 219 transitions, 1854 flow. Second operand 26 states and 1984 transitions. [2022-11-21 17:07:50,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 316 transitions, 2808 flow [2022-11-21 17:07:50,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 316 transitions, 2738 flow, removed 4 selfloop flow, removed 17 redundant places. [2022-11-21 17:07:50,706 INFO L231 Difference]: Finished difference. Result has 271 places, 219 transitions, 1918 flow [2022-11-21 17:07:50,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1918, PETRI_PLACES=271, PETRI_TRANSITIONS=219} [2022-11-21 17:07:50,706 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 151 predicate places. [2022-11-21 17:07:50,706 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 219 transitions, 1918 flow [2022-11-21 17:07:50,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 72.5576923076923) internal successors, (3773), 52 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:50,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:07:50,707 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:07:50,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-21 17:07:50,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:50,908 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:07:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:07:50,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1278539891, now seen corresponding path program 1 times [2022-11-21 17:07:50,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:07:50,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797769051] [2022-11-21 17:07:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:07:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:52,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:07:52,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797769051] [2022-11-21 17:07:52,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797769051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:07:52,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263317170] [2022-11-21 17:07:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:07:52,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:07:52,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:07:52,007 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:07:52,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-21 17:07:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:07:52,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-21 17:07:52,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:07:52,172 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 [2022-11-21 17:07:52,289 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:07:52,289 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 [2022-11-21 17:07:52,561 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 [2022-11-21 17:07:52,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:07:52,892 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 [2022-11-21 17:07:52,961 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 [2022-11-21 17:07:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:53,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:07:53,363 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_778 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_778) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967296))) is different from false [2022-11-21 17:07:53,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:07:53,841 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 [2022-11-21 17:07:53,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:07:53,849 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 [2022-11-21 17:07:53,853 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 [2022-11-21 17:07:53,858 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 [2022-11-21 17:07:54,514 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 [2022-11-21 17:07:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:07:54,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263317170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:07:54,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:07:54,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-11-21 17:07:54,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993496900] [2022-11-21 17:07:54,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:07:54,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 17:07:54,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:07:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 17:07:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2414, Unknown=39, NotChecked=100, Total=2756 [2022-11-21 17:07:54,561 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 142 [2022-11-21 17:07:54,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 219 transitions, 1918 flow. Second operand has 53 states, 53 states have (on average 69.67924528301887) internal successors, (3693), 53 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:07:54,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:07:54,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 142 [2022-11-21 17:07:54,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:08:06,984 INFO L130 PetriNetUnfolder]: 14797/33885 cut-off events. [2022-11-21 17:08:06,984 INFO L131 PetriNetUnfolder]: For 301779/302776 co-relation queries the response was YES. [2022-11-21 17:08:07,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128755 conditions, 33885 events. 14797/33885 cut-off events. For 301779/302776 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 391456 event pairs, 5762 based on Foata normal form. 129/30983 useless extension candidates. Maximal degree in co-relation 128711. Up to 9892 conditions per place. [2022-11-21 17:08:07,441 INFO L137 encePairwiseOnDemand]: 119/142 looper letters, 203 selfloop transitions, 34 changer transitions 0/337 dead transitions. [2022-11-21 17:08:07,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 337 transitions, 3438 flow [2022-11-21 17:08:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 17:08:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-21 17:08:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2051 transitions. [2022-11-21 17:08:07,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5158450704225352 [2022-11-21 17:08:07,446 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2051 transitions. [2022-11-21 17:08:07,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2051 transitions. [2022-11-21 17:08:07,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:08:07,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2051 transitions. [2022-11-21 17:08:07,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 73.25) internal successors, (2051), 28 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:08:07,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 142.0) internal successors, (4118), 29 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:08:07,456 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 142.0) internal successors, (4118), 29 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:08:07,457 INFO L175 Difference]: Start difference. First operand has 271 places, 219 transitions, 1918 flow. Second operand 28 states and 2051 transitions. [2022-11-21 17:08:07,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 337 transitions, 3438 flow [2022-11-21 17:08:07,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 337 transitions, 3204 flow, removed 8 selfloop flow, removed 23 redundant places. [2022-11-21 17:08:07,798 INFO L231 Difference]: Finished difference. Result has 279 places, 231 transitions, 1957 flow [2022-11-21 17:08:07,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1957, PETRI_PLACES=279, PETRI_TRANSITIONS=231} [2022-11-21 17:08:07,799 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 159 predicate places. [2022-11-21 17:08:07,799 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 231 transitions, 1957 flow [2022-11-21 17:08:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 69.67924528301887) internal successors, (3693), 53 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:08:07,800 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:08:07,800 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:08:07,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-21 17:08:08,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:08:08,001 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:08:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:08:08,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1278539894, now seen corresponding path program 2 times [2022-11-21 17:08:08,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:08:08,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500287596] [2022-11-21 17:08:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:08:08,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:08:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:08:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:08:08,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:08:08,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500287596] [2022-11-21 17:08:08,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500287596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:08:08,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262993113] [2022-11-21 17:08:08,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:08:08,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:08:08,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:08:08,801 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:08:08,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-21 17:08:08,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:08:08,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:08:08,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-21 17:08:08,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:08:09,308 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 [2022-11-21 17:08:09,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:08:09,554 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 [2022-11-21 17:08:09,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:08:09,626 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 [2022-11-21 17:08:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:08:09,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:08:10,275 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_810 (Array Int Int)) (v_ArrVal_809 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_809) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_810) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 9223372039002259456)) is different from false [2022-11-21 17:08:10,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:08:10,647 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 [2022-11-21 17:08:10,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 17:08:10,655 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 142 treesize of output 132 [2022-11-21 17:08:10,663 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 59 treesize of output 51 [2022-11-21 17:08:10,669 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 110 treesize of output 94 [2022-11-21 17:08:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:08:11,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262993113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:08:11,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:08:11,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-11-21 17:08:11,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537568808] [2022-11-21 17:08:11,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:08:11,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 17:08:11,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:08:11,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 17:08:11,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2425, Unknown=22, NotChecked=100, Total=2756 [2022-11-21 17:08:11,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 142 [2022-11-21 17:08:11,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 231 transitions, 1957 flow. Second operand has 53 states, 53 states have (on average 69.67924528301887) internal successors, (3693), 53 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:08:11,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:08:11,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 142 [2022-11-21 17:08:11,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:08:22,829 INFO L130 PetriNetUnfolder]: 14331/33995 cut-off events. [2022-11-21 17:08:22,829 INFO L131 PetriNetUnfolder]: For 257538/258520 co-relation queries the response was YES. [2022-11-21 17:08:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127706 conditions, 33995 events. 14331/33995 cut-off events. For 257538/258520 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 398847 event pairs, 5777 based on Foata normal form. 161/31125 useless extension candidates. Maximal degree in co-relation 127658. Up to 10936 conditions per place. [2022-11-21 17:08:23,516 INFO L137 encePairwiseOnDemand]: 119/142 looper letters, 187 selfloop transitions, 34 changer transitions 0/321 dead transitions. [2022-11-21 17:08:23,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 321 transitions, 3111 flow [2022-11-21 17:08:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 17:08:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-21 17:08:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1904 transitions. [2022-11-21 17:08:23,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5157096424702059 [2022-11-21 17:08:23,521 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1904 transitions. [2022-11-21 17:08:23,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1904 transitions. [2022-11-21 17:08:23,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:08:23,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1904 transitions. [2022-11-21 17:08:23,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.23076923076923) internal successors, (1904), 26 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:08:23,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:08:23,531 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:08:23,531 INFO L175 Difference]: Start difference. First operand has 279 places, 231 transitions, 1957 flow. Second operand 26 states and 1904 transitions. [2022-11-21 17:08:23,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 321 transitions, 3111 flow [2022-11-21 17:08:24,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 321 transitions, 3075 flow, removed 2 selfloop flow, removed 16 redundant places. [2022-11-21 17:08:24,150 INFO L231 Difference]: Finished difference. Result has 288 places, 231 transitions, 1989 flow [2022-11-21 17:08:24,151 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1989, PETRI_PLACES=288, PETRI_TRANSITIONS=231} [2022-11-21 17:08:24,151 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 168 predicate places. [2022-11-21 17:08:24,151 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 231 transitions, 1989 flow [2022-11-21 17:08:24,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 69.67924528301887) internal successors, (3693), 53 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:08:24,152 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:08:24,152 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:08:24,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-21 17:08:24,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:08:24,358 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-21 17:08:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:08:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash -161398043, now seen corresponding path program 3 times [2022-11-21 17:08:24,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:08:24,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857543702] [2022-11-21 17:08:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:08:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:08:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:08:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:08:24,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:08:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857543702] [2022-11-21 17:08:24,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857543702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:08:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457976861] [2022-11-21 17:08:24,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:08:24,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:08:24,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:08:24,681 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:08:24,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f232a7c3-50ae-4731-b678-72a2abbae78f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-21 17:08:24,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 17:08:24,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:08:24,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 17:08:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates...