./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/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_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-8393723 [2022-11-18 20:28:20,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:28:20,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:28:20,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:28:20,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:28:20,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:28:20,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:28:20,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:28:20,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:28:20,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:28:20,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:28:20,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:28:20,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:28:20,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:28:20,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:28:20,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:28:20,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:28:20,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:28:20,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:28:20,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:28:20,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:28:20,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:28:20,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:28:20,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:28:20,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:28:20,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:28:20,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:28:20,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:28:20,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:28:20,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:28:20,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:28:20,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:28:20,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:28:20,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:28:20,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:28:20,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:28:20,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:28:20,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:28:20,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:28:20,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:28:20,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:28:20,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 20:28:20,430 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:28:20,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:28:20,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:28:20,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:28:20,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:28:20,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:28:20,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:28:20,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:28:20,434 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:28:20,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:28:20,435 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:28:20,435 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:28:20,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:28:20,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:28:20,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:28:20,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:28:20,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:28:20,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:28:20,436 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 20:28:20,436 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:28:20,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:28:20,437 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:28:20,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:28:20,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:28:20,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:28:20,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:28:20,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:28:20,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:28:20,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:28:20,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:28:20,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:28:20,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:28:20,439 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:28:20,439 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:28:20,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:28:20,439 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_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-11-18 20:28:20,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:28:20,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:28:20,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:28:20,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:28:20,786 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:28:20,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-11-18 20:28:20,860 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/data/a551e8202/c81c3ccee69c4897a14ebbdb8008daf7/FLAGf58575b84 [2022-11-18 20:28:21,283 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:28:21,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-11-18 20:28:21,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/data/a551e8202/c81c3ccee69c4897a14ebbdb8008daf7/FLAGf58575b84 [2022-11-18 20:28:21,674 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/data/a551e8202/c81c3ccee69c4897a14ebbdb8008daf7 [2022-11-18 20:28:21,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:28:21,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:28:21,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:28:21,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:28:21,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:28:21,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:28:21" (1/1) ... [2022-11-18 20:28:21,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f3eece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:21, skipping insertion in model container [2022-11-18 20:28:21,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:28:21" (1/1) ... [2022-11-18 20:28:21,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:28:21,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:28:21,960 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-11-18 20:28:21,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:28:21,978 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:28:21,997 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-11-18 20:28:22,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:28:22,018 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:28:22,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22 WrapperNode [2022-11-18 20:28:22,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:28:22,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:28:22,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:28:22,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:28:22,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,080 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 178 [2022-11-18 20:28:22,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:28:22,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:28:22,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:28:22,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:28:22,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,133 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:28:22,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:28:22,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:28:22,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:28:22,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (1/1) ... [2022-11-18 20:28:22,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:28:22,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:22,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:28:22,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:28:22,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:28:22,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:28:22,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:28:22,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:28:22,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:28:22,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:28:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:28:22,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:28:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:28:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:28:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:28:22,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:28:22,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:28:22,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:28:22,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:28:22,239 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:28:22,380 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:28:22,382 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:28:22,831 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:28:23,115 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:28:23,116 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:28:23,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:28:23 BoogieIcfgContainer [2022-11-18 20:28:23,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:28:23,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:28:23,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:28:23,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:28:23,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:28:21" (1/3) ... [2022-11-18 20:28:23,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257b9d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:28:23, skipping insertion in model container [2022-11-18 20:28:23,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:28:22" (2/3) ... [2022-11-18 20:28:23,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257b9d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:28:23, skipping insertion in model container [2022-11-18 20:28:23,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:28:23" (3/3) ... [2022-11-18 20:28:23,129 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-11-18 20:28:23,139 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:28:23,147 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:28:23,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-18 20:28:23,147 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:28:23,312 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:28:23,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 300 flow [2022-11-18 20:28:23,456 INFO L130 PetriNetUnfolder]: 9/140 cut-off events. [2022-11-18 20:28:23,456 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:28:23,461 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. [2022-11-18 20:28:23,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 142 transitions, 300 flow [2022-11-18 20:28:23,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 121 transitions, 251 flow [2022-11-18 20:28:23,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:28:23,484 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;@54ad78b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:28:23,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-11-18 20:28:23,500 INFO L130 PetriNetUnfolder]: 3/56 cut-off events. [2022-11-18 20:28:23,501 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:28:23,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:23,502 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] [2022-11-18 20:28:23,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:23,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:23,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2057947961, now seen corresponding path program 1 times [2022-11-18 20:28:23,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:23,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443226639] [2022-11-18 20:28:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:23,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:23,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:23,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443226639] [2022-11-18 20:28:23,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443226639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:23,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:23,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:28:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718565320] [2022-11-18 20:28:23,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:23,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:28:23,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:23,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:28:23,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:28:23,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 142 [2022-11-18 20:28:23,955 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) [2022-11-18 20:28:23,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:23,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 142 [2022-11-18 20:28:23,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:24,380 INFO L130 PetriNetUnfolder]: 157/569 cut-off events. [2022-11-18 20:28:24,381 INFO L131 PetriNetUnfolder]: For 96/106 co-relation queries the response was YES. [2022-11-18 20:28:24,387 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. [2022-11-18 20:28:24,392 INFO L137 encePairwiseOnDemand]: 127/142 looper letters, 42 selfloop transitions, 4 changer transitions 2/133 dead transitions. [2022-11-18 20:28:24,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 133 transitions, 376 flow [2022-11-18 20:28:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:28:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:28:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2022-11-18 20:28:24,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8295774647887324 [2022-11-18 20:28:24,419 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2022-11-18 20:28:24,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2022-11-18 20:28:24,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:24,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2022-11-18 20:28:24,434 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) [2022-11-18 20:28:24,446 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) [2022-11-18 20:28:24,448 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) [2022-11-18 20:28:24,450 INFO L175 Difference]: Start difference. First operand has 120 places, 121 transitions, 251 flow. Second operand 5 states and 589 transitions. [2022-11-18 20:28:24,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 133 transitions, 376 flow [2022-11-18 20:28:24,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 133 transitions, 366 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 20:28:24,464 INFO L231 Difference]: Finished difference. Result has 120 places, 113 transitions, 254 flow [2022-11-18 20:28:24,466 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} [2022-11-18 20:28:24,472 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 0 predicate places. [2022-11-18 20:28:24,473 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 113 transitions, 254 flow [2022-11-18 20:28:24,473 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) [2022-11-18 20:28:24,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:24,474 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:24,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:28:24,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash 734160778, now seen corresponding path program 1 times [2022-11-18 20:28:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:24,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924399617] [2022-11-18 20:28:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:24,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:24,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:24,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924399617] [2022-11-18 20:28:24,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924399617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:24,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:24,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:28:24,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805734674] [2022-11-18 20:28:24,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:24,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:28:24,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:24,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:28:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:28:24,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 142 [2022-11-18 20:28:24,764 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) [2022-11-18 20:28:24,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:24,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 142 [2022-11-18 20:28:24,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:25,131 INFO L130 PetriNetUnfolder]: 139/551 cut-off events. [2022-11-18 20:28:25,131 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-18 20:28:25,133 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. [2022-11-18 20:28:25,139 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 49 selfloop transitions, 8 changer transitions 2/136 dead transitions. [2022-11-18 20:28:25,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 136 transitions, 424 flow [2022-11-18 20:28:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:28:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 20:28:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 828 transitions. [2022-11-18 20:28:25,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7288732394366197 [2022-11-18 20:28:25,142 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 828 transitions. [2022-11-18 20:28:25,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 828 transitions. [2022-11-18 20:28:25,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:25,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 828 transitions. [2022-11-18 20:28:25,145 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) [2022-11-18 20:28:25,148 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) [2022-11-18 20:28:25,149 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) [2022-11-18 20:28:25,149 INFO L175 Difference]: Start difference. First operand has 120 places, 113 transitions, 254 flow. Second operand 8 states and 828 transitions. [2022-11-18 20:28:25,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 136 transitions, 424 flow [2022-11-18 20:28:25,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 136 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:28:25,156 INFO L231 Difference]: Finished difference. Result has 127 places, 115 transitions, 284 flow [2022-11-18 20:28:25,156 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} [2022-11-18 20:28:25,157 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 7 predicate places. [2022-11-18 20:28:25,157 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 115 transitions, 284 flow [2022-11-18 20:28:25,158 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) [2022-11-18 20:28:25,158 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:25,159 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] [2022-11-18 20:28:25,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:28:25,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:25,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:25,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1409923475, now seen corresponding path program 1 times [2022-11-18 20:28:25,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:25,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765051665] [2022-11-18 20:28:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:25,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:25,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:25,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765051665] [2022-11-18 20:28:25,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765051665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:25,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210214628] [2022-11-18 20:28:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:25,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:25,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:25,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:25,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:28:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:25,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:28:25,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:25,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:25,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210214628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:25,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:25,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 20:28:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350669637] [2022-11-18 20:28:25,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:25,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:28:25,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:28:25,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:28:25,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 142 [2022-11-18 20:28:25,610 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) [2022-11-18 20:28:25,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:25,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 142 [2022-11-18 20:28:25,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:26,243 INFO L130 PetriNetUnfolder]: 324/1173 cut-off events. [2022-11-18 20:28:26,243 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-18 20:28:26,246 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. [2022-11-18 20:28:26,252 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 88 selfloop transitions, 18 changer transitions 0/192 dead transitions. [2022-11-18 20:28:26,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 192 transitions, 694 flow [2022-11-18 20:28:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:28:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:28:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1999 transitions. [2022-11-18 20:28:26,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7820813771517997 [2022-11-18 20:28:26,258 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1999 transitions. [2022-11-18 20:28:26,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1999 transitions. [2022-11-18 20:28:26,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:26,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1999 transitions. [2022-11-18 20:28:26,264 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) [2022-11-18 20:28:26,270 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) [2022-11-18 20:28:26,273 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) [2022-11-18 20:28:26,273 INFO L175 Difference]: Start difference. First operand has 127 places, 115 transitions, 284 flow. Second operand 18 states and 1999 transitions. [2022-11-18 20:28:26,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 192 transitions, 694 flow [2022-11-18 20:28:26,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 192 transitions, 684 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:28:26,282 INFO L231 Difference]: Finished difference. Result has 144 places, 127 transitions, 380 flow [2022-11-18 20:28:26,282 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} [2022-11-18 20:28:26,285 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 24 predicate places. [2022-11-18 20:28:26,285 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 380 flow [2022-11-18 20:28:26,286 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) [2022-11-18 20:28:26,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:26,286 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] [2022-11-18 20:28:26,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:26,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:26,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:26,493 INFO L85 PathProgramCache]: Analyzing trace with hash 757955234, now seen corresponding path program 1 times [2022-11-18 20:28:26,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:26,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039155176] [2022-11-18 20:28:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:26,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:26,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039155176] [2022-11-18 20:28:26,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039155176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:26,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927930605] [2022-11-18 20:28:26,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:26,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:26,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:26,677 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:26,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:28:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:26,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:28:26,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:26,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:28:26,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927930605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:26,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:28:26,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 20:28:26,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425342868] [2022-11-18 20:28:26,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:26,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:28:26,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:28:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:28:26,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 142 [2022-11-18 20:28:26,828 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) [2022-11-18 20:28:26,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:26,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 142 [2022-11-18 20:28:26,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:27,253 INFO L130 PetriNetUnfolder]: 324/1169 cut-off events. [2022-11-18 20:28:27,253 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-11-18 20:28:27,256 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. [2022-11-18 20:28:27,262 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 38 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2022-11-18 20:28:27,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 135 transitions, 481 flow [2022-11-18 20:28:27,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:28:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:28:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 776 transitions. [2022-11-18 20:28:27,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7806841046277666 [2022-11-18 20:28:27,265 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 776 transitions. [2022-11-18 20:28:27,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 776 transitions. [2022-11-18 20:28:27,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:27,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 776 transitions. [2022-11-18 20:28:27,267 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) [2022-11-18 20:28:27,269 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) [2022-11-18 20:28:27,270 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) [2022-11-18 20:28:27,270 INFO L175 Difference]: Start difference. First operand has 144 places, 127 transitions, 380 flow. Second operand 7 states and 776 transitions. [2022-11-18 20:28:27,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 135 transitions, 481 flow [2022-11-18 20:28:27,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 135 transitions, 449 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-18 20:28:27,275 INFO L231 Difference]: Finished difference. Result has 140 places, 123 transitions, 343 flow [2022-11-18 20:28:27,275 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} [2022-11-18 20:28:27,276 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 20 predicate places. [2022-11-18 20:28:27,276 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 123 transitions, 343 flow [2022-11-18 20:28:27,277 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) [2022-11-18 20:28:27,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:27,277 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:27,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:27,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:27,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:27,490 INFO L85 PathProgramCache]: Analyzing trace with hash 678856734, now seen corresponding path program 1 times [2022-11-18 20:28:27,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:27,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181059698] [2022-11-18 20:28:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:27,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:27,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:27,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181059698] [2022-11-18 20:28:27,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181059698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:27,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:27,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:28:27,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422991679] [2022-11-18 20:28:27,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:27,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:28:27,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:27,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:28:27,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:28:27,696 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 142 [2022-11-18 20:28:27,697 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) [2022-11-18 20:28:27,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:27,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 142 [2022-11-18 20:28:27,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:28,150 INFO L130 PetriNetUnfolder]: 482/1446 cut-off events. [2022-11-18 20:28:28,150 INFO L131 PetriNetUnfolder]: For 194/197 co-relation queries the response was YES. [2022-11-18 20:28:28,155 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. [2022-11-18 20:28:28,162 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 38 selfloop transitions, 6 changer transitions 10/133 dead transitions. [2022-11-18 20:28:28,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 133 transitions, 474 flow [2022-11-18 20:28:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:28:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 20:28:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 816 transitions. [2022-11-18 20:28:28,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7183098591549296 [2022-11-18 20:28:28,166 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 816 transitions. [2022-11-18 20:28:28,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 816 transitions. [2022-11-18 20:28:28,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:28,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 816 transitions. [2022-11-18 20:28:28,169 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) [2022-11-18 20:28:28,193 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) [2022-11-18 20:28:28,194 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) [2022-11-18 20:28:28,194 INFO L175 Difference]: Start difference. First operand has 140 places, 123 transitions, 343 flow. Second operand 8 states and 816 transitions. [2022-11-18 20:28:28,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 133 transitions, 474 flow [2022-11-18 20:28:28,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 133 transitions, 460 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 20:28:28,198 INFO L231 Difference]: Finished difference. Result has 144 places, 121 transitions, 333 flow [2022-11-18 20:28:28,198 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} [2022-11-18 20:28:28,199 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 24 predicate places. [2022-11-18 20:28:28,199 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 121 transitions, 333 flow [2022-11-18 20:28:28,200 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) [2022-11-18 20:28:28,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:28,200 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] [2022-11-18 20:28:28,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:28:28,200 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:28,201 INFO L85 PathProgramCache]: Analyzing trace with hash -532535998, now seen corresponding path program 1 times [2022-11-18 20:28:28,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:28,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547694262] [2022-11-18 20:28:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:28,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:28:28,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:28,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547694262] [2022-11-18 20:28:28,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547694262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:28,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:28,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:28:28,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240999440] [2022-11-18 20:28:28,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:28,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:28:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:28,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:28:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:28:28,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-18 20:28:28,461 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) [2022-11-18 20:28:28,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:28,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-18 20:28:28,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:28,863 INFO L130 PetriNetUnfolder]: 513/1482 cut-off events. [2022-11-18 20:28:28,863 INFO L131 PetriNetUnfolder]: For 91/103 co-relation queries the response was YES. [2022-11-18 20:28:28,867 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. [2022-11-18 20:28:28,876 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 23 selfloop transitions, 3 changer transitions 0/131 dead transitions. [2022-11-18 20:28:28,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 131 transitions, 408 flow [2022-11-18 20:28:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:28:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:28:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2022-11-18 20:28:28,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8661971830985915 [2022-11-18 20:28:28,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2022-11-18 20:28:28,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2022-11-18 20:28:28,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:28,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2022-11-18 20:28:28,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:28,884 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) [2022-11-18 20:28:28,885 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) [2022-11-18 20:28:28,886 INFO L175 Difference]: Start difference. First operand has 144 places, 121 transitions, 333 flow. Second operand 3 states and 369 transitions. [2022-11-18 20:28:28,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 131 transitions, 408 flow [2022-11-18 20:28:28,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 131 transitions, 386 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-18 20:28:28,897 INFO L231 Difference]: Finished difference. Result has 133 places, 123 transitions, 336 flow [2022-11-18 20:28:28,898 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} [2022-11-18 20:28:28,901 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 13 predicate places. [2022-11-18 20:28:28,902 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 123 transitions, 336 flow [2022-11-18 20:28:28,902 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) [2022-11-18 20:28:28,902 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:28,903 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] [2022-11-18 20:28:28,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:28:28,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash -532536002, now seen corresponding path program 1 times [2022-11-18 20:28:28,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:28,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853921634] [2022-11-18 20:28:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:29,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853921634] [2022-11-18 20:28:29,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853921634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:29,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094829695] [2022-11-18 20:28:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:29,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:29,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:29,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:29,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:28:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:29,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:28:29,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:29,990 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 [2022-11-18 20:28:30,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:30,190 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 [2022-11-18 20:28:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:30,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:30,422 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 [2022-11-18 20:28:30,443 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 [2022-11-18 20:28:30,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:30,554 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 [2022-11-18 20:28:30,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:30,569 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 [2022-11-18 20:28:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:30,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094829695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:30,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:30,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-18 20:28:30,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050905131] [2022-11-18 20:28:30,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:30,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:28:30,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:30,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:28:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=932, Unknown=10, NotChecked=126, Total=1190 [2022-11-18 20:28:30,813 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 142 [2022-11-18 20:28:30,817 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) [2022-11-18 20:28:30,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:30,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 142 [2022-11-18 20:28:30,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:33,373 INFO L130 PetriNetUnfolder]: 2150/4675 cut-off events. [2022-11-18 20:28:33,373 INFO L131 PetriNetUnfolder]: For 325/580 co-relation queries the response was YES. [2022-11-18 20:28:33,386 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. [2022-11-18 20:28:33,417 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 67 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2022-11-18 20:28:33,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 166 transitions, 629 flow [2022-11-18 20:28:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:28:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:28:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1568 transitions. [2022-11-18 20:28:33,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6134585289514867 [2022-11-18 20:28:33,423 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1568 transitions. [2022-11-18 20:28:33,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1568 transitions. [2022-11-18 20:28:33,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:33,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1568 transitions. [2022-11-18 20:28:33,428 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) [2022-11-18 20:28:33,432 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) [2022-11-18 20:28:33,433 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) [2022-11-18 20:28:33,433 INFO L175 Difference]: Start difference. First operand has 133 places, 123 transitions, 336 flow. Second operand 18 states and 1568 transitions. [2022-11-18 20:28:33,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 166 transitions, 629 flow [2022-11-18 20:28:33,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 166 transitions, 626 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:28:33,438 INFO L231 Difference]: Finished difference. Result has 157 places, 145 transitions, 492 flow [2022-11-18 20:28:33,439 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} [2022-11-18 20:28:33,439 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 37 predicate places. [2022-11-18 20:28:33,439 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 145 transitions, 492 flow [2022-11-18 20:28:33,441 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) [2022-11-18 20:28:33,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:33,441 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] [2022-11-18 20:28:33,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:33,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:28:33,647 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash -532535999, now seen corresponding path program 1 times [2022-11-18 20:28:33,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:33,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211319998] [2022-11-18 20:28:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:33,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:34,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211319998] [2022-11-18 20:28:34,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211319998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:34,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096314934] [2022-11-18 20:28:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:34,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:34,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:34,323 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:34,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:28:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:34,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:28:34,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:34,632 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 [2022-11-18 20:28:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,807 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 [2022-11-18 20:28:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:34,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:35,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:35,187 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 [2022-11-18 20:28:35,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:35,196 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 [2022-11-18 20:28:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:35,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096314934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:35,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:35,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-18 20:28:35,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558118314] [2022-11-18 20:28:35,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:35,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:28:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:28:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1051, Unknown=13, NotChecked=0, Total=1190 [2022-11-18 20:28:35,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 142 [2022-11-18 20:28:35,405 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) [2022-11-18 20:28:35,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:35,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 142 [2022-11-18 20:28:35,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:37,946 INFO L130 PetriNetUnfolder]: 2273/5029 cut-off events. [2022-11-18 20:28:37,946 INFO L131 PetriNetUnfolder]: For 761/1098 co-relation queries the response was YES. [2022-11-18 20:28:37,967 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 39158 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. [2022-11-18 20:28:37,995 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 67 selfloop transitions, 33 changer transitions 0/169 dead transitions. [2022-11-18 20:28:37,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 760 flow [2022-11-18 20:28:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:28:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:28:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1567 transitions. [2022-11-18 20:28:38,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6130672926447575 [2022-11-18 20:28:38,000 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1567 transitions. [2022-11-18 20:28:38,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1567 transitions. [2022-11-18 20:28:38,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:38,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1567 transitions. [2022-11-18 20:28:38,006 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) [2022-11-18 20:28:38,010 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) [2022-11-18 20:28:38,011 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) [2022-11-18 20:28:38,012 INFO L175 Difference]: Start difference. First operand has 157 places, 145 transitions, 492 flow. Second operand 18 states and 1567 transitions. [2022-11-18 20:28:38,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 760 flow [2022-11-18 20:28:38,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 169 transitions, 751 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 20:28:38,019 INFO L231 Difference]: Finished difference. Result has 170 places, 149 transitions, 577 flow [2022-11-18 20:28:38,020 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} [2022-11-18 20:28:38,023 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 50 predicate places. [2022-11-18 20:28:38,024 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 149 transitions, 577 flow [2022-11-18 20:28:38,025 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) [2022-11-18 20:28:38,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:38,025 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] [2022-11-18 20:28:38,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:38,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:38,231 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash 829907582, now seen corresponding path program 1 times [2022-11-18 20:28:38,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:38,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554786683] [2022-11-18 20:28:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:38,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:28:38,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554786683] [2022-11-18 20:28:38,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554786683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:28:38,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:28:38,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:28:38,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759451524] [2022-11-18 20:28:38,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:28:38,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:28:38,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:38,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:28:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:28:38,299 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-18 20:28:38,299 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) [2022-11-18 20:28:38,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:38,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-18 20:28:38,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:39,334 INFO L130 PetriNetUnfolder]: 1504/4360 cut-off events. [2022-11-18 20:28:39,334 INFO L131 PetriNetUnfolder]: For 1349/1579 co-relation queries the response was YES. [2022-11-18 20:28:39,356 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 39150 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. [2022-11-18 20:28:39,374 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 58 selfloop transitions, 7 changer transitions 0/181 dead transitions. [2022-11-18 20:28:39,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 181 transitions, 823 flow [2022-11-18 20:28:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:28:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:28:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2022-11-18 20:28:39,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8323943661971831 [2022-11-18 20:28:39,377 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2022-11-18 20:28:39,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2022-11-18 20:28:39,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:39,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2022-11-18 20:28:39,379 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) [2022-11-18 20:28:39,380 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) [2022-11-18 20:28:39,381 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) [2022-11-18 20:28:39,381 INFO L175 Difference]: Start difference. First operand has 170 places, 149 transitions, 577 flow. Second operand 5 states and 591 transitions. [2022-11-18 20:28:39,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 181 transitions, 823 flow [2022-11-18 20:28:39,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 181 transitions, 787 flow, removed 3 selfloop flow, removed 14 redundant places. [2022-11-18 20:28:39,394 INFO L231 Difference]: Finished difference. Result has 163 places, 153 transitions, 595 flow [2022-11-18 20:28:39,395 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} [2022-11-18 20:28:39,396 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 43 predicate places. [2022-11-18 20:28:39,396 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 153 transitions, 595 flow [2022-11-18 20:28:39,396 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) [2022-11-18 20:28:39,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:39,397 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] [2022-11-18 20:28:39,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:28:39,397 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:39,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1400933945, now seen corresponding path program 1 times [2022-11-18 20:28:39,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:39,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974690054] [2022-11-18 20:28:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:39,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:40,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:40,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974690054] [2022-11-18 20:28:40,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974690054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:40,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977037379] [2022-11-18 20:28:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:40,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:40,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:40,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:40,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:28:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:40,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:28:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:40,370 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 [2022-11-18 20:28:40,406 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:28:40,407 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 [2022-11-18 20:28:40,608 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:28:40,609 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 [2022-11-18 20:28:40,779 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 [2022-11-18 20:28:41,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:28:41,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:41,209 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 [2022-11-18 20:28:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:41,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:41,387 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_162 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_162) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-18 20:28:41,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:41,760 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 [2022-11-18 20:28:41,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:41,771 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 [2022-11-18 20:28:41,778 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 [2022-11-18 20:28:41,784 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 [2022-11-18 20:28:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:42,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977037379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:42,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:42,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-11-18 20:28:42,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796321237] [2022-11-18 20:28:42,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:42,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 20:28:42,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:42,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 20:28:42,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1464, Unknown=38, NotChecked=78, Total=1722 [2022-11-18 20:28:42,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-18 20:28:42,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 153 transitions, 595 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) [2022-11-18 20:28:42,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:42,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-18 20:28:42,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:46,089 INFO L130 PetriNetUnfolder]: 2594/6884 cut-off events. [2022-11-18 20:28:46,089 INFO L131 PetriNetUnfolder]: For 5265/5695 co-relation queries the response was YES. [2022-11-18 20:28:46,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 6884 events. 2594/6884 cut-off events. For 5265/5695 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 63540 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. [2022-11-18 20:28:46,138 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 107 selfloop transitions, 39 changer transitions 0/213 dead transitions. [2022-11-18 20:28:46,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 213 transitions, 1127 flow [2022-11-18 20:28:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:28:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 20:28:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1585 transitions. [2022-11-18 20:28:46,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5874722016308377 [2022-11-18 20:28:46,146 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1585 transitions. [2022-11-18 20:28:46,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1585 transitions. [2022-11-18 20:28:46,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:46,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1585 transitions. [2022-11-18 20:28:46,152 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) [2022-11-18 20:28:46,157 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) [2022-11-18 20:28:46,158 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) [2022-11-18 20:28:46,158 INFO L175 Difference]: Start difference. First operand has 163 places, 153 transitions, 595 flow. Second operand 19 states and 1585 transitions. [2022-11-18 20:28:46,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 213 transitions, 1127 flow [2022-11-18 20:28:46,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 213 transitions, 1123 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:28:46,174 INFO L231 Difference]: Finished difference. Result has 183 places, 166 transitions, 819 flow [2022-11-18 20:28:46,175 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=819, PETRI_PLACES=183, PETRI_TRANSITIONS=166} [2022-11-18 20:28:46,176 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 63 predicate places. [2022-11-18 20:28:46,179 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 166 transitions, 819 flow [2022-11-18 20:28:46,188 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) [2022-11-18 20:28:46,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:46,197 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] [2022-11-18 20:28:46,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:46,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:28:46,402 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:46,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1464774200, now seen corresponding path program 1 times [2022-11-18 20:28:46,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:46,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75356351] [2022-11-18 20:28:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:46,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:47,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:47,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75356351] [2022-11-18 20:28:47,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75356351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:47,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420964758] [2022-11-18 20:28:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:47,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:47,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:47,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:47,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:28:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:47,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:28:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:47,219 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 [2022-11-18 20:28:47,339 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:28:47,340 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 [2022-11-18 20:28:47,478 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 [2022-11-18 20:28:47,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:47,730 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 [2022-11-18 20:28:47,853 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 [2022-11-18 20:28:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:47,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:47,937 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_191 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_191) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 9223372039002259456))) is different from false [2022-11-18 20:28:47,943 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_191 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_191) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-11-18 20:28:48,112 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_191 (Array Int Int)) (v_ArrVal_190 (Array Int Int))) (< 0 (+ (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_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456))) is different from false [2022-11-18 20:28:48,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:48,253 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 [2022-11-18 20:28:48,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:48,263 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 [2022-11-18 20:28:48,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-11-18 20:28:48,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:28:48,766 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 [2022-11-18 20:28:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:48,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420964758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:48,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:48,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-18 20:28:48,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988422979] [2022-11-18 20:28:48,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:48,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:28:48,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:48,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:28:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1253, Unknown=24, NotChecked=222, Total=1640 [2022-11-18 20:28:48,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-18 20:28:48,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 166 transitions, 819 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) [2022-11-18 20:28:48,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:48,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-18 20:28:48,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:51,453 INFO L130 PetriNetUnfolder]: 2568/6839 cut-off events. [2022-11-18 20:28:51,453 INFO L131 PetriNetUnfolder]: For 8647/9078 co-relation queries the response was YES. [2022-11-18 20:28:51,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16587 conditions, 6839 events. 2568/6839 cut-off events. For 8647/9078 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 63277 event pairs, 1250 based on Foata normal form. 39/4953 useless extension candidates. Maximal degree in co-relation 16461. Up to 2199 conditions per place. [2022-11-18 20:28:51,506 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 105 selfloop transitions, 40 changer transitions 0/212 dead transitions. [2022-11-18 20:28:51,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 212 transitions, 1243 flow [2022-11-18 20:28:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:28:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-18 20:28:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1661 transitions. [2022-11-18 20:28:51,510 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5848591549295775 [2022-11-18 20:28:51,510 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1661 transitions. [2022-11-18 20:28:51,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1661 transitions. [2022-11-18 20:28:51,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:51,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1661 transitions. [2022-11-18 20:28:51,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 83.05) internal successors, (1661), 20 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:51,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:51,519 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:51,520 INFO L175 Difference]: Start difference. First operand has 183 places, 166 transitions, 819 flow. Second operand 20 states and 1661 transitions. [2022-11-18 20:28:51,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 212 transitions, 1243 flow [2022-11-18 20:28:51,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 212 transitions, 1217 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-11-18 20:28:51,539 INFO L231 Difference]: Finished difference. Result has 189 places, 166 transitions, 872 flow [2022-11-18 20:28:51,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=872, PETRI_PLACES=189, PETRI_TRANSITIONS=166} [2022-11-18 20:28:51,540 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 69 predicate places. [2022-11-18 20:28:51,541 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 166 transitions, 872 flow [2022-11-18 20:28:51,542 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) [2022-11-18 20:28:51,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:51,542 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] [2022-11-18 20:28:51,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:51,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:28:51,748 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1834364626, now seen corresponding path program 1 times [2022-11-18 20:28:51,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:51,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818051737] [2022-11-18 20:28:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:51,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:52,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:52,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818051737] [2022-11-18 20:28:52,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818051737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:52,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348688144] [2022-11-18 20:28:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:52,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:52,382 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:52,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:28:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:52,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:28:52,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:52,504 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 [2022-11-18 20:28:52,623 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:28:52,623 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 [2022-11-18 20:28:52,751 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 [2022-11-18 20:28:52,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:52,959 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 [2022-11-18 20:28:53,015 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 [2022-11-18 20:28:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:53,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:53,147 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_220 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_220) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2022-11-18 20:28:53,237 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_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456)) is different from false [2022-11-18 20:28:53,247 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 [2022-11-18 20:28:53,253 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_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456)) is different from false [2022-11-18 20:28:53,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:53,287 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 [2022-11-18 20:28:53,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:53,297 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 [2022-11-18 20:28:53,306 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 [2022-11-18 20:28:53,319 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 [2022-11-18 20:28:53,763 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 [2022-11-18 20:28:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-18 20:28:53,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348688144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:53,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:53,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-18 20:28:53,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568952155] [2022-11-18 20:28:53,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:53,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:28:53,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:53,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:28:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1194, Unknown=9, NotChecked=292, Total=1640 [2022-11-18 20:28:53,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-18 20:28:53,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 166 transitions, 872 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) [2022-11-18 20:28:53,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:53,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-18 20:28:53,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:56,645 INFO L130 PetriNetUnfolder]: 2972/8079 cut-off events. [2022-11-18 20:28:56,645 INFO L131 PetriNetUnfolder]: For 14681/14930 co-relation queries the response was YES. [2022-11-18 20:28:56,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20759 conditions, 8079 events. 2972/8079 cut-off events. For 14681/14930 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 83447 event pairs, 1084 based on Foata normal form. 4/6054 useless extension candidates. Maximal degree in co-relation 20632. Up to 2021 conditions per place. [2022-11-18 20:28:56,707 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 118 selfloop transitions, 28 changer transitions 0/225 dead transitions. [2022-11-18 20:28:56,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 225 transitions, 1495 flow [2022-11-18 20:28:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:28:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-18 20:28:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1660 transitions. [2022-11-18 20:28:56,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5845070422535211 [2022-11-18 20:28:56,711 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1660 transitions. [2022-11-18 20:28:56,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1660 transitions. [2022-11-18 20:28:56,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:56,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1660 transitions. [2022-11-18 20:28:56,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 83.0) internal successors, (1660), 20 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:56,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:56,720 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:56,720 INFO L175 Difference]: Start difference. First operand has 189 places, 166 transitions, 872 flow. Second operand 20 states and 1660 transitions. [2022-11-18 20:28:56,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 225 transitions, 1495 flow [2022-11-18 20:28:56,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 225 transitions, 1453 flow, removed 4 selfloop flow, removed 15 redundant places. [2022-11-18 20:28:56,743 INFO L231 Difference]: Finished difference. Result has 196 places, 178 transitions, 949 flow [2022-11-18 20:28:56,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=834, 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=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=949, PETRI_PLACES=196, PETRI_TRANSITIONS=178} [2022-11-18 20:28:56,744 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 76 predicate places. [2022-11-18 20:28:56,744 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 178 transitions, 949 flow [2022-11-18 20:28:56,745 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) [2022-11-18 20:28:56,746 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:56,746 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] [2022-11-18 20:28:56,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:56,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:28:56,951 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:28:56,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1834364629, now seen corresponding path program 1 times [2022-11-18 20:28:56,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:56,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697853033] [2022-11-18 20:28:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:56,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:57,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:57,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697853033] [2022-11-18 20:28:57,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697853033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:57,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022213588] [2022-11-18 20:28:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:57,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:57,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:57,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:28:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:57,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:28:57,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:57,710 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 [2022-11-18 20:28:57,804 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:28:57,805 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 [2022-11-18 20:28:57,927 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 [2022-11-18 20:28:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:58,139 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 [2022-11-18 20:28:58,196 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 [2022-11-18 20:28:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:58,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:58,401 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_~A~0.base) c_~A~0.offset) 4294967296))) is different from false [2022-11-18 20:28:58,415 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 [2022-11-18 20:28:58,428 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_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 4294967296))) is different from false [2022-11-18 20:28:58,435 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_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967296))) is different from false [2022-11-18 20:28:58,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:58,472 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 [2022-11-18 20:28:58,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:58,480 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 [2022-11-18 20:28:58,487 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 [2022-11-18 20:28:58,492 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 [2022-11-18 20:28:58,936 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 [2022-11-18 20:28:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-18 20:28:58,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022213588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:58,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:58,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2022-11-18 20:28:58,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340429353] [2022-11-18 20:28:58,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:58,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 20:28:58,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:58,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 20:28:58,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1119, Unknown=14, NotChecked=284, Total=1560 [2022-11-18 20:28:58,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-18 20:28:58,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 178 transitions, 949 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) [2022-11-18 20:28:58,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:58,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-18 20:28:58,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:01,555 INFO L130 PetriNetUnfolder]: 2940/8011 cut-off events. [2022-11-18 20:29:01,556 INFO L131 PetriNetUnfolder]: For 15231/15480 co-relation queries the response was YES. [2022-11-18 20:29:01,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22396 conditions, 8011 events. 2940/8011 cut-off events. For 15231/15480 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 82573 event pairs, 1084 based on Foata normal form. 4/6254 useless extension candidates. Maximal degree in co-relation 22265. Up to 1992 conditions per place. [2022-11-18 20:29:01,607 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 116 selfloop transitions, 28 changer transitions 0/223 dead transitions. [2022-11-18 20:29:01,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 223 transitions, 1528 flow [2022-11-18 20:29:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:29:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 20:29:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1580 transitions. [2022-11-18 20:29:01,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5856189770200149 [2022-11-18 20:29:01,611 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1580 transitions. [2022-11-18 20:29:01,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1580 transitions. [2022-11-18 20:29:01,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:01,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1580 transitions. [2022-11-18 20:29:01,615 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) [2022-11-18 20:29:01,619 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) [2022-11-18 20:29:01,620 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) [2022-11-18 20:29:01,620 INFO L175 Difference]: Start difference. First operand has 196 places, 178 transitions, 949 flow. Second operand 19 states and 1580 transitions. [2022-11-18 20:29:01,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 223 transitions, 1528 flow [2022-11-18 20:29:01,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 223 transitions, 1504 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-11-18 20:29:01,647 INFO L231 Difference]: Finished difference. Result has 203 places, 179 transitions, 987 flow [2022-11-18 20:29:01,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=987, PETRI_PLACES=203, PETRI_TRANSITIONS=179} [2022-11-18 20:29:01,648 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 83 predicate places. [2022-11-18 20:29:01,648 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 179 transitions, 987 flow [2022-11-18 20:29:01,649 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) [2022-11-18 20:29:01,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:01,650 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] [2022-11-18 20:29:01,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:29:01,855 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1437114282, now seen corresponding path program 1 times [2022-11-18 20:29:01,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:01,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143981134] [2022-11-18 20:29:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:01,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:02,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:02,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143981134] [2022-11-18 20:29:02,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143981134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:02,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590038078] [2022-11-18 20:29:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:02,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:02,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:02,042 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:02,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:29:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:02,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:29:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:02,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:02,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590038078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:02,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:02,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-18 20:29:02,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315284826] [2022-11-18 20:29:02,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:02,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:29:02,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:29:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:29:02,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 142 [2022-11-18 20:29:02,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 179 transitions, 987 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) [2022-11-18 20:29:02,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:02,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 142 [2022-11-18 20:29:02,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:03,931 INFO L130 PetriNetUnfolder]: 1552/4863 cut-off events. [2022-11-18 20:29:03,931 INFO L131 PetriNetUnfolder]: For 7621/7756 co-relation queries the response was YES. [2022-11-18 20:29:03,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14063 conditions, 4863 events. 1552/4863 cut-off events. For 7621/7756 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 43035 event pairs, 915 based on Foata normal form. 16/3957 useless extension candidates. Maximal degree in co-relation 13935. Up to 2420 conditions per place. [2022-11-18 20:29:03,961 INFO L137 encePairwiseOnDemand]: 126/142 looper letters, 130 selfloop transitions, 23 changer transitions 5/241 dead transitions. [2022-11-18 20:29:03,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 241 transitions, 1501 flow [2022-11-18 20:29:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:29:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 20:29:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1591 transitions. [2022-11-18 20:29:03,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6590720795360397 [2022-11-18 20:29:03,964 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1591 transitions. [2022-11-18 20:29:03,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1591 transitions. [2022-11-18 20:29:03,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:03,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1591 transitions. [2022-11-18 20:29:03,968 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) [2022-11-18 20:29:03,972 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) [2022-11-18 20:29:03,973 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) [2022-11-18 20:29:03,973 INFO L175 Difference]: Start difference. First operand has 203 places, 179 transitions, 987 flow. Second operand 17 states and 1591 transitions. [2022-11-18 20:29:03,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 241 transitions, 1501 flow [2022-11-18 20:29:04,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 241 transitions, 1440 flow, removed 11 selfloop flow, removed 17 redundant places. [2022-11-18 20:29:04,004 INFO L231 Difference]: Finished difference. Result has 203 places, 169 transitions, 863 flow [2022-11-18 20:29:04,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=863, PETRI_PLACES=203, PETRI_TRANSITIONS=169} [2022-11-18 20:29:04,004 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 83 predicate places. [2022-11-18 20:29:04,005 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 169 transitions, 863 flow [2022-11-18 20:29:04,005 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) [2022-11-18 20:29:04,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:04,006 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] [2022-11-18 20:29:04,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:04,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:04,211 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:04,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:04,211 INFO L85 PathProgramCache]: Analyzing trace with hash -959802870, now seen corresponding path program 2 times [2022-11-18 20:29:04,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:04,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882261404] [2022-11-18 20:29:04,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:04,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:04,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882261404] [2022-11-18 20:29:04,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882261404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:04,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163041005] [2022-11-18 20:29:04,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:04,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:04,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:04,841 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:04,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:29:04,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:04,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:04,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:29:04,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:05,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:29:05,264 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 20:29:05,264 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 [2022-11-18 20:29:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:05,447 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 [2022-11-18 20:29:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:05,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:05,630 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_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456))) is different from false [2022-11-18 20:29:05,638 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_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456))) is different from false [2022-11-18 20:29:05,643 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_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456))) is different from false [2022-11-18 20:29:06,936 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-18 20:29:06,936 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 [2022-11-18 20:29:06,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:29:06,945 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 [2022-11-18 20:29:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-18 20:29:09,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163041005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:09,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:09,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-18 20:29:09,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035993301] [2022-11-18 20:29:09,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:09,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:29:09,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:09,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:29:09,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1395, Unknown=21, NotChecked=234, Total=1806 [2022-11-18 20:29:09,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-18 20:29:09,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 169 transitions, 863 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) [2022-11-18 20:29:09,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:09,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-18 20:29:09,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:13,004 INFO L130 PetriNetUnfolder]: 2842/7244 cut-off events. [2022-11-18 20:29:13,004 INFO L131 PetriNetUnfolder]: For 13648/14018 co-relation queries the response was YES. [2022-11-18 20:29:13,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21613 conditions, 7244 events. 2842/7244 cut-off events. For 13648/14018 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 65273 event pairs, 1044 based on Foata normal form. 95/5975 useless extension candidates. Maximal degree in co-relation 21476. Up to 2947 conditions per place. [2022-11-18 20:29:13,048 INFO L137 encePairwiseOnDemand]: 117/142 looper letters, 110 selfloop transitions, 55 changer transitions 0/231 dead transitions. [2022-11-18 20:29:13,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 231 transitions, 1583 flow [2022-11-18 20:29:13,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 20:29:13,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-18 20:29:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2511 transitions. [2022-11-18 20:29:13,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5704225352112676 [2022-11-18 20:29:13,053 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2511 transitions. [2022-11-18 20:29:13,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2511 transitions. [2022-11-18 20:29:13,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:13,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2511 transitions. [2022-11-18 20:29:13,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 81.0) internal successors, (2511), 31 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:13,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 142.0) internal successors, (4544), 32 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:13,066 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 142.0) internal successors, (4544), 32 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:13,066 INFO L175 Difference]: Start difference. First operand has 203 places, 169 transitions, 863 flow. Second operand 31 states and 2511 transitions. [2022-11-18 20:29:13,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 231 transitions, 1583 flow [2022-11-18 20:29:13,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 231 transitions, 1564 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-11-18 20:29:13,119 INFO L231 Difference]: Finished difference. Result has 235 places, 192 transitions, 1194 flow [2022-11-18 20:29:13,119 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1194, PETRI_PLACES=235, PETRI_TRANSITIONS=192} [2022-11-18 20:29:13,119 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 115 predicate places. [2022-11-18 20:29:13,119 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 192 transitions, 1194 flow [2022-11-18 20:29:13,120 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) [2022-11-18 20:29:13,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:13,120 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] [2022-11-18 20:29:13,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:13,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:13,321 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:13,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1606528545, now seen corresponding path program 1 times [2022-11-18 20:29:13,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:13,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128676463] [2022-11-18 20:29:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:29:13,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:13,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128676463] [2022-11-18 20:29:13,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128676463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:13,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:13,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:29:13,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446739862] [2022-11-18 20:29:13,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:13,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:13,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:13,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:13,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-18 20:29:13,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 192 transitions, 1194 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) [2022-11-18 20:29:13,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:13,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-18 20:29:13,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:14,584 INFO L130 PetriNetUnfolder]: 1982/5300 cut-off events. [2022-11-18 20:29:14,584 INFO L131 PetriNetUnfolder]: For 22816/23152 co-relation queries the response was YES. [2022-11-18 20:29:14,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19726 conditions, 5300 events. 1982/5300 cut-off events. For 22816/23152 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 49223 event pairs, 419 based on Foata normal form. 6/4169 useless extension candidates. Maximal degree in co-relation 19599. Up to 2424 conditions per place. [2022-11-18 20:29:14,625 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 78 selfloop transitions, 6 changer transitions 0/231 dead transitions. [2022-11-18 20:29:14,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 231 transitions, 1716 flow [2022-11-18 20:29:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:29:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:29:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2022-11-18 20:29:14,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8309859154929577 [2022-11-18 20:29:14,627 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2022-11-18 20:29:14,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2022-11-18 20:29:14,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:14,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2022-11-18 20:29:14,629 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) [2022-11-18 20:29:14,630 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) [2022-11-18 20:29:14,630 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) [2022-11-18 20:29:14,630 INFO L175 Difference]: Start difference. First operand has 235 places, 192 transitions, 1194 flow. Second operand 5 states and 590 transitions. [2022-11-18 20:29:14,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 231 transitions, 1716 flow [2022-11-18 20:29:14,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 231 transitions, 1612 flow, removed 9 selfloop flow, removed 20 redundant places. [2022-11-18 20:29:14,655 INFO L231 Difference]: Finished difference. Result has 222 places, 195 transitions, 1152 flow [2022-11-18 20:29:14,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1152, PETRI_PLACES=222, PETRI_TRANSITIONS=195} [2022-11-18 20:29:14,656 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 102 predicate places. [2022-11-18 20:29:14,656 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 195 transitions, 1152 flow [2022-11-18 20:29:14,656 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) [2022-11-18 20:29:14,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:14,657 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] [2022-11-18 20:29:14,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 20:29:14,657 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash -959802867, now seen corresponding path program 2 times [2022-11-18 20:29:14,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:14,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203991094] [2022-11-18 20:29:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:14,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:15,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:15,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203991094] [2022-11-18 20:29:15,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203991094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:15,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798731664] [2022-11-18 20:29:15,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:15,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:15,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:15,294 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:15,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:29:15,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:15,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:15,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 20:29:15,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:15,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:29:15,696 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 20:29:15,696 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 [2022-11-18 20:29:15,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:15,869 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 [2022-11-18 20:29:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:15,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:18,499 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 [2022-11-18 20:29:18,531 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-18 20:29:18,531 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 [2022-11-18 20:29:18,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:29:18,539 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 [2022-11-18 20:29:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-18 20:29:18,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798731664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:18,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:18,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-18 20:29:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216361240] [2022-11-18 20:29:18,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:18,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:29:18,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:18,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:29:18,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1526, Unknown=29, NotChecked=80, Total=1806 [2022-11-18 20:29:18,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-18 20:29:18,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 195 transitions, 1152 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) [2022-11-18 20:29:18,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:18,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-18 20:29:18,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:22,032 INFO L130 PetriNetUnfolder]: 3179/9164 cut-off events. [2022-11-18 20:29:22,032 INFO L131 PetriNetUnfolder]: For 22619/23162 co-relation queries the response was YES. [2022-11-18 20:29:22,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28440 conditions, 9164 events. 3179/9164 cut-off events. For 22619/23162 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 91792 event pairs, 1326 based on Foata normal form. 105/8091 useless extension candidates. Maximal degree in co-relation 28299. Up to 3419 conditions per place. [2022-11-18 20:29:22,122 INFO L137 encePairwiseOnDemand]: 118/142 looper letters, 93 selfloop transitions, 73 changer transitions 0/235 dead transitions. [2022-11-18 20:29:22,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 235 transitions, 1776 flow [2022-11-18 20:29:22,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:29:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 20:29:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1781 transitions. [2022-11-18 20:29:22,126 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5701024327784892 [2022-11-18 20:29:22,126 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1781 transitions. [2022-11-18 20:29:22,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1781 transitions. [2022-11-18 20:29:22,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:22,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1781 transitions. [2022-11-18 20:29:22,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 80.95454545454545) internal successors, (1781), 22 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:22,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:22,134 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:22,135 INFO L175 Difference]: Start difference. First operand has 222 places, 195 transitions, 1152 flow. Second operand 22 states and 1781 transitions. [2022-11-18 20:29:22,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 235 transitions, 1776 flow [2022-11-18 20:29:22,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 235 transitions, 1773 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:29:22,214 INFO L231 Difference]: Finished difference. Result has 244 places, 205 transitions, 1460 flow [2022-11-18 20:29:22,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1460, PETRI_PLACES=244, PETRI_TRANSITIONS=205} [2022-11-18 20:29:22,215 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 124 predicate places. [2022-11-18 20:29:22,215 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 205 transitions, 1460 flow [2022-11-18 20:29:22,215 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) [2022-11-18 20:29:22,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:22,216 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] [2022-11-18 20:29:22,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:22,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:29:22,421 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1470534958, now seen corresponding path program 1 times [2022-11-18 20:29:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:22,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066870391] [2022-11-18 20:29:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:29:22,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:22,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066870391] [2022-11-18 20:29:22,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066870391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:22,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:22,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:29:22,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138700480] [2022-11-18 20:29:22,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:22,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:22,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:22,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:22,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:22,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-18 20:29:22,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 205 transitions, 1460 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) [2022-11-18 20:29:22,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:22,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-18 20:29:22,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:23,466 INFO L130 PetriNetUnfolder]: 813/4114 cut-off events. [2022-11-18 20:29:23,466 INFO L131 PetriNetUnfolder]: For 13799/13958 co-relation queries the response was YES. [2022-11-18 20:29:23,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12754 conditions, 4114 events. 813/4114 cut-off events. For 13799/13958 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 43430 event pairs, 180 based on Foata normal form. 24/3831 useless extension candidates. Maximal degree in co-relation 12622. Up to 864 conditions per place. [2022-11-18 20:29:23,502 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 70 selfloop transitions, 20 changer transitions 0/253 dead transitions. [2022-11-18 20:29:23,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 253 transitions, 1992 flow [2022-11-18 20:29:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:29:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:29:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 619 transitions. [2022-11-18 20:29:23,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8718309859154929 [2022-11-18 20:29:23,504 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 619 transitions. [2022-11-18 20:29:23,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 619 transitions. [2022-11-18 20:29:23,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:23,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 619 transitions. [2022-11-18 20:29:23,506 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) [2022-11-18 20:29:23,507 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) [2022-11-18 20:29:23,507 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) [2022-11-18 20:29:23,507 INFO L175 Difference]: Start difference. First operand has 244 places, 205 transitions, 1460 flow. Second operand 5 states and 619 transitions. [2022-11-18 20:29:23,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 253 transitions, 1992 flow [2022-11-18 20:29:23,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 253 transitions, 1827 flow, removed 10 selfloop flow, removed 18 redundant places. [2022-11-18 20:29:23,535 INFO L231 Difference]: Finished difference. Result has 234 places, 216 transitions, 1526 flow [2022-11-18 20:29:23,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1526, PETRI_PLACES=234, PETRI_TRANSITIONS=216} [2022-11-18 20:29:23,536 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 114 predicate places. [2022-11-18 20:29:23,536 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 216 transitions, 1526 flow [2022-11-18 20:29:23,536 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) [2022-11-18 20:29:23,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:23,537 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] [2022-11-18 20:29:23,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 20:29:23,537 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:23,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1765079577, now seen corresponding path program 1 times [2022-11-18 20:29:23,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:23,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719557430] [2022-11-18 20:29:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:23,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:29:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:23,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719557430] [2022-11-18 20:29:23,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719557430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:23,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:23,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:29:23,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801538696] [2022-11-18 20:29:23,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:23,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:23,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:23,675 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-18 20:29:23,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 216 transitions, 1526 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) [2022-11-18 20:29:23,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:23,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-18 20:29:23,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:24,490 INFO L130 PetriNetUnfolder]: 710/3990 cut-off events. [2022-11-18 20:29:24,490 INFO L131 PetriNetUnfolder]: For 18444/18854 co-relation queries the response was YES. [2022-11-18 20:29:24,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12731 conditions, 3990 events. 710/3990 cut-off events. For 18444/18854 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 42153 event pairs, 144 based on Foata normal form. 204/4032 useless extension candidates. Maximal degree in co-relation 12604. Up to 706 conditions per place. [2022-11-18 20:29:24,519 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 75 selfloop transitions, 26 changer transitions 0/264 dead transitions. [2022-11-18 20:29:24,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 264 transitions, 2134 flow [2022-11-18 20:29:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:29:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:29:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 619 transitions. [2022-11-18 20:29:24,520 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8718309859154929 [2022-11-18 20:29:24,521 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 619 transitions. [2022-11-18 20:29:24,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 619 transitions. [2022-11-18 20:29:24,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:24,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 619 transitions. [2022-11-18 20:29:24,522 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) [2022-11-18 20:29:24,523 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) [2022-11-18 20:29:24,523 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) [2022-11-18 20:29:24,524 INFO L175 Difference]: Start difference. First operand has 234 places, 216 transitions, 1526 flow. Second operand 5 states and 619 transitions. [2022-11-18 20:29:24,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 264 transitions, 2134 flow [2022-11-18 20:29:24,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 264 transitions, 2134 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:29:24,558 INFO L231 Difference]: Finished difference. Result has 242 places, 229 transitions, 1831 flow [2022-11-18 20:29:24,559 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1831, PETRI_PLACES=242, PETRI_TRANSITIONS=229} [2022-11-18 20:29:24,559 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 122 predicate places. [2022-11-18 20:29:24,559 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 229 transitions, 1831 flow [2022-11-18 20:29:24,560 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) [2022-11-18 20:29:24,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:24,560 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] [2022-11-18 20:29:24,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 20:29:24,560 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1484174696, now seen corresponding path program 1 times [2022-11-18 20:29:24,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:24,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121034226] [2022-11-18 20:29:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:24,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:29:24,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:24,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121034226] [2022-11-18 20:29:24,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121034226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:24,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:24,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:29:24,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218479055] [2022-11-18 20:29:24,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:24,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:24,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:24,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-18 20:29:24,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 229 transitions, 1831 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) [2022-11-18 20:29:24,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:24,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-18 20:29:24,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:25,675 INFO L130 PetriNetUnfolder]: 654/3730 cut-off events. [2022-11-18 20:29:25,675 INFO L131 PetriNetUnfolder]: For 20205/20678 co-relation queries the response was YES. [2022-11-18 20:29:25,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12143 conditions, 3730 events. 654/3730 cut-off events. For 20205/20678 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 38403 event pairs, 126 based on Foata normal form. 241/3834 useless extension candidates. Maximal degree in co-relation 12010. Up to 729 conditions per place. [2022-11-18 20:29:25,706 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 69 selfloop transitions, 10 changer transitions 0/242 dead transitions. [2022-11-18 20:29:25,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 242 transitions, 1957 flow [2022-11-18 20:29:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:29:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:29:25,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2022-11-18 20:29:25,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8549295774647887 [2022-11-18 20:29:25,708 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2022-11-18 20:29:25,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2022-11-18 20:29:25,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:25,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2022-11-18 20:29:25,709 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) [2022-11-18 20:29:25,710 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) [2022-11-18 20:29:25,711 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) [2022-11-18 20:29:25,711 INFO L175 Difference]: Start difference. First operand has 242 places, 229 transitions, 1831 flow. Second operand 5 states and 607 transitions. [2022-11-18 20:29:25,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 242 transitions, 1957 flow [2022-11-18 20:29:25,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 242 transitions, 1957 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:29:25,751 INFO L231 Difference]: Finished difference. Result has 246 places, 217 transitions, 1640 flow [2022-11-18 20:29:25,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1640, PETRI_PLACES=246, PETRI_TRANSITIONS=217} [2022-11-18 20:29:25,752 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 126 predicate places. [2022-11-18 20:29:25,752 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 217 transitions, 1640 flow [2022-11-18 20:29:25,753 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) [2022-11-18 20:29:25,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:25,753 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] [2022-11-18 20:29:25,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 20:29:25,753 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:25,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1484174697, now seen corresponding path program 1 times [2022-11-18 20:29:25,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:25,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977591451] [2022-11-18 20:29:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:25,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:29:25,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:25,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977591451] [2022-11-18 20:29:25,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977591451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:25,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:25,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:29:25,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922617125] [2022-11-18 20:29:25,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:25,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:25,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:25,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:25,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:25,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-18 20:29:25,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 217 transitions, 1640 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) [2022-11-18 20:29:25,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:25,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-18 20:29:25,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:26,765 INFO L130 PetriNetUnfolder]: 576/3344 cut-off events. [2022-11-18 20:29:26,765 INFO L131 PetriNetUnfolder]: For 16420/16622 co-relation queries the response was YES. [2022-11-18 20:29:26,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10574 conditions, 3344 events. 576/3344 cut-off events. For 16420/16622 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 33276 event pairs, 115 based on Foata normal form. 201/3427 useless extension candidates. Maximal degree in co-relation 10437. Up to 536 conditions per place. [2022-11-18 20:29:26,813 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 54 selfloop transitions, 9 changer transitions 0/226 dead transitions. [2022-11-18 20:29:26,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 226 transitions, 1690 flow [2022-11-18 20:29:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:29:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:29:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2022-11-18 20:29:26,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.852112676056338 [2022-11-18 20:29:26,817 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2022-11-18 20:29:26,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2022-11-18 20:29:26,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:26,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2022-11-18 20:29:26,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:26,820 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) [2022-11-18 20:29:26,820 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) [2022-11-18 20:29:26,820 INFO L175 Difference]: Start difference. First operand has 246 places, 217 transitions, 1640 flow. Second operand 5 states and 605 transitions. [2022-11-18 20:29:26,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 226 transitions, 1690 flow [2022-11-18 20:29:26,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 226 transitions, 1626 flow, removed 4 selfloop flow, removed 8 redundant places. [2022-11-18 20:29:26,852 INFO L231 Difference]: Finished difference. Result has 240 places, 201 transitions, 1333 flow [2022-11-18 20:29:26,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1333, PETRI_PLACES=240, PETRI_TRANSITIONS=201} [2022-11-18 20:29:26,853 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 120 predicate places. [2022-11-18 20:29:26,853 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 201 transitions, 1333 flow [2022-11-18 20:29:26,853 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) [2022-11-18 20:29:26,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:26,855 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] [2022-11-18 20:29:26,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 20:29:26,855 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash -377995030, now seen corresponding path program 2 times [2022-11-18 20:29:26,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:26,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331672949] [2022-11-18 20:29:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:27,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331672949] [2022-11-18 20:29:27,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331672949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:27,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171256483] [2022-11-18 20:29:27,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:27,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:27,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:27,582 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:27,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:29:27,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:27,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:27,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:29:27,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:27,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:29:28,160 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 20:29:28,160 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 [2022-11-18 20:29:28,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:28,397 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 [2022-11-18 20:29:28,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:28,508 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 [2022-11-18 20:29:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:28,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:28,644 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int))) (< 0 (+ (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) 9223372039002259456))) is different from false [2022-11-18 20:29:28,817 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int)) (v_ArrVal_420 (Array Int Int))) (< 0 (+ (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|) 9223372039002259456))) is different from false [2022-11-18 20:29:30,416 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-18 20:29:30,417 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 [2022-11-18 20:29:30,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:29:30,427 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 [2022-11-18 20:29:30,433 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 [2022-11-18 20:29:30,438 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 [2022-11-18 20:29:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:32,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171256483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:32,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:32,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-11-18 20:29:32,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681102118] [2022-11-18 20:29:32,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:32,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 20:29:32,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 20:29:32,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1933, Unknown=49, NotChecked=182, Total=2352 [2022-11-18 20:29:32,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 142 [2022-11-18 20:29:32,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 201 transitions, 1333 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) [2022-11-18 20:29:32,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:32,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 142 [2022-11-18 20:29:32,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:36,646 INFO L130 PetriNetUnfolder]: 2465/8051 cut-off events. [2022-11-18 20:29:36,646 INFO L131 PetriNetUnfolder]: For 23897/24242 co-relation queries the response was YES. [2022-11-18 20:29:36,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25200 conditions, 8051 events. 2465/8051 cut-off events. For 23897/24242 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 83099 event pairs, 1023 based on Foata normal form. 146/7654 useless extension candidates. Maximal degree in co-relation 25043. Up to 1631 conditions per place. [2022-11-18 20:29:36,701 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 102 selfloop transitions, 52 changer transitions 0/224 dead transitions. [2022-11-18 20:29:36,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 224 transitions, 1768 flow [2022-11-18 20:29:36,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:29:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:29:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1591 transitions. [2022-11-18 20:29:36,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5335345405767941 [2022-11-18 20:29:36,704 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1591 transitions. [2022-11-18 20:29:36,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1591 transitions. [2022-11-18 20:29:36,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:36,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1591 transitions. [2022-11-18 20:29:36,706 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) [2022-11-18 20:29:36,708 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) [2022-11-18 20:29:36,709 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) [2022-11-18 20:29:36,709 INFO L175 Difference]: Start difference. First operand has 240 places, 201 transitions, 1333 flow. Second operand 21 states and 1591 transitions. [2022-11-18 20:29:36,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 224 transitions, 1768 flow [2022-11-18 20:29:36,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 224 transitions, 1736 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 20:29:36,747 INFO L231 Difference]: Finished difference. Result has 257 places, 200 transitions, 1447 flow [2022-11-18 20:29:36,747 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1447, PETRI_PLACES=257, PETRI_TRANSITIONS=200} [2022-11-18 20:29:36,747 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 137 predicate places. [2022-11-18 20:29:36,748 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 200 transitions, 1447 flow [2022-11-18 20:29:36,748 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) [2022-11-18 20:29:36,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:36,748 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] [2022-11-18 20:29:36,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:36,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 20:29:36,949 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:36,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:36,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1704682213, now seen corresponding path program 2 times [2022-11-18 20:29:36,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:36,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478924998] [2022-11-18 20:29:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:36,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:37,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478924998] [2022-11-18 20:29:37,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478924998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944574466] [2022-11-18 20:29:37,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:37,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:37,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:37,695 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:37,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:29:37,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:37,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:37,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:29:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:38,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:29:38,253 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 20:29:38,253 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 [2022-11-18 20:29:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:38,499 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 [2022-11-18 20:29:38,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:38,612 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 [2022-11-18 20:29:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:38,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:38,699 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_455 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_455) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 4294967295)) is different from false [2022-11-18 20:29:38,778 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_455 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_454) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_455) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-18 20:29:38,803 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_455 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_454) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_455) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 4294967295)) is different from false [2022-11-18 20:29:38,999 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_455 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_454) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_455) |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 [2022-11-18 20:29:41,358 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_44| Int) (v_ArrVal_452 Int) (v_ArrVal_454 (Array Int Int)) (v_ArrVal_455 (Array Int Int))) (or (<= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_44| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_452)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_454) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_455) |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_44| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)))) is different from false [2022-11-18 20:29:41,393 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-18 20:29:41,393 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 [2022-11-18 20:29:41,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:29:41,402 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 [2022-11-18 20:29:41,408 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 53 treesize of output 49 [2022-11-18 20:29:41,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-11-18 20:29:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-18 20:29:41,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944574466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:41,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:41,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-18 20:29:41,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476396707] [2022-11-18 20:29:41,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:41,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 20:29:41,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 20:29:41,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1628, Unknown=25, NotChecked=430, Total=2256 [2022-11-18 20:29:41,823 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 142 [2022-11-18 20:29:41,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 200 transitions, 1447 flow. Second operand has 48 states, 48 states have (on average 77.33333333333333) internal successors, (3712), 48 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:41,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:41,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 142 [2022-11-18 20:29:41,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:46,729 INFO L130 PetriNetUnfolder]: 2299/8012 cut-off events. [2022-11-18 20:29:46,729 INFO L131 PetriNetUnfolder]: For 30067/30405 co-relation queries the response was YES. [2022-11-18 20:29:46,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25518 conditions, 8012 events. 2299/8012 cut-off events. For 30067/30405 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 83839 event pairs, 1153 based on Foata normal form. 107/7650 useless extension candidates. Maximal degree in co-relation 25353. Up to 1670 conditions per place. [2022-11-18 20:29:46,812 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 148 selfloop transitions, 53 changer transitions 0/274 dead transitions. [2022-11-18 20:29:46,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 274 transitions, 2312 flow [2022-11-18 20:29:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:29:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 20:29:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2173 transitions. [2022-11-18 20:29:46,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5667709963484612 [2022-11-18 20:29:46,816 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2173 transitions. [2022-11-18 20:29:46,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2173 transitions. [2022-11-18 20:29:46,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:46,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2173 transitions. [2022-11-18 20:29:46,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 80.48148148148148) internal successors, (2173), 27 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:46,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:46,825 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:46,825 INFO L175 Difference]: Start difference. First operand has 257 places, 200 transitions, 1447 flow. Second operand 27 states and 2173 transitions. [2022-11-18 20:29:46,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 274 transitions, 2312 flow [2022-11-18 20:29:46,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 274 transitions, 2230 flow, removed 4 selfloop flow, removed 18 redundant places. [2022-11-18 20:29:46,884 INFO L231 Difference]: Finished difference. Result has 269 places, 210 transitions, 1671 flow [2022-11-18 20:29:46,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1671, PETRI_PLACES=269, PETRI_TRANSITIONS=210} [2022-11-18 20:29:46,884 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 149 predicate places. [2022-11-18 20:29:46,884 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 210 transitions, 1671 flow [2022-11-18 20:29:46,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 77.33333333333333) internal successors, (3712), 48 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:46,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:46,885 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] [2022-11-18 20:29:46,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:47,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 20:29:47,085 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1349062719, now seen corresponding path program 1 times [2022-11-18 20:29:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:47,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673423531] [2022-11-18 20:29:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:47,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:47,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673423531] [2022-11-18 20:29:47,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673423531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:47,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377808979] [2022-11-18 20:29:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:47,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:47,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:47,256 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:47,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:29:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:47,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:29:47,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:47,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:47,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377808979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:47,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:47,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-18 20:29:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855691521] [2022-11-18 20:29:47,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:47,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:29:47,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:29:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:29:47,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 142 [2022-11-18 20:29:47,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 210 transitions, 1671 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) [2022-11-18 20:29:47,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:47,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 142 [2022-11-18 20:29:47,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:49,273 INFO L130 PetriNetUnfolder]: 1471/5171 cut-off events. [2022-11-18 20:29:49,273 INFO L131 PetriNetUnfolder]: For 25354/25491 co-relation queries the response was YES. [2022-11-18 20:29:49,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18604 conditions, 5171 events. 1471/5171 cut-off events. For 25354/25491 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 48557 event pairs, 943 based on Foata normal form. 38/4955 useless extension candidates. Maximal degree in co-relation 18440. Up to 2809 conditions per place. [2022-11-18 20:29:49,321 INFO L137 encePairwiseOnDemand]: 126/142 looper letters, 77 selfloop transitions, 14 changer transitions 62/259 dead transitions. [2022-11-18 20:29:49,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 259 transitions, 2305 flow [2022-11-18 20:29:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:29:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 20:29:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1558 transitions. [2022-11-18 20:29:49,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6454018227009114 [2022-11-18 20:29:49,324 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1558 transitions. [2022-11-18 20:29:49,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1558 transitions. [2022-11-18 20:29:49,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:49,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1558 transitions. [2022-11-18 20:29:49,327 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) [2022-11-18 20:29:49,334 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) [2022-11-18 20:29:49,335 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) [2022-11-18 20:29:49,335 INFO L175 Difference]: Start difference. First operand has 269 places, 210 transitions, 1671 flow. Second operand 17 states and 1558 transitions. [2022-11-18 20:29:49,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 259 transitions, 2305 flow [2022-11-18 20:29:49,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 259 transitions, 2242 flow, removed 5 selfloop flow, removed 22 redundant places. [2022-11-18 20:29:49,379 INFO L231 Difference]: Finished difference. Result has 264 places, 182 transitions, 1370 flow [2022-11-18 20:29:49,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1370, PETRI_PLACES=264, PETRI_TRANSITIONS=182} [2022-11-18 20:29:49,380 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 144 predicate places. [2022-11-18 20:29:49,380 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 182 transitions, 1370 flow [2022-11-18 20:29:49,380 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) [2022-11-18 20:29:49,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:49,380 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] [2022-11-18 20:29:49,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:49,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:49,581 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:49,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1772825951, now seen corresponding path program 2 times [2022-11-18 20:29:49,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:49,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555638853] [2022-11-18 20:29:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:49,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:50,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:50,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555638853] [2022-11-18 20:29:50,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555638853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:50,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968072273] [2022-11-18 20:29:50,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:50,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:50,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:50,293 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:50,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:29:50,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:50,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:50,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:29:50,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:50,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:29:50,855 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 20:29:50,856 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 [2022-11-18 20:29:51,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:51,087 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 [2022-11-18 20:29:51,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:51,156 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 [2022-11-18 20:29:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:51,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:51,294 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_513 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_513) c_~A~0.base) c_~A~0.offset) 4294967296))) is different from false [2022-11-18 20:29:52,852 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-18 20:29:52,852 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 [2022-11-18 20:29:52,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:29:52,861 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 [2022-11-18 20:29:52,869 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 [2022-11-18 20:29:52,874 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 [2022-11-18 20:29:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:55,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968072273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:55,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:55,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-18 20:29:55,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749506984] [2022-11-18 20:29:55,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:55,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 20:29:55,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 20:29:55,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1921, Unknown=50, NotChecked=90, Total=2256 [2022-11-18 20:29:55,255 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 142 [2022-11-18 20:29:55,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 182 transitions, 1370 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) [2022-11-18 20:29:55,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:55,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 142 [2022-11-18 20:29:55,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:58,657 INFO L130 PetriNetUnfolder]: 2053/6232 cut-off events. [2022-11-18 20:29:58,657 INFO L131 PetriNetUnfolder]: For 36143/36397 co-relation queries the response was YES. [2022-11-18 20:29:58,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22387 conditions, 6232 events. 2053/6232 cut-off events. For 36143/36397 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 62616 event pairs, 607 based on Foata normal form. 140/6032 useless extension candidates. Maximal degree in co-relation 22328. Up to 1590 conditions per place. [2022-11-18 20:29:58,754 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 86 selfloop transitions, 44 changer transitions 0/212 dead transitions. [2022-11-18 20:29:58,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 212 transitions, 1969 flow [2022-11-18 20:29:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:29:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 20:29:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1727 transitions. [2022-11-18 20:29:58,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5528169014084507 [2022-11-18 20:29:58,757 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1727 transitions. [2022-11-18 20:29:58,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1727 transitions. [2022-11-18 20:29:58,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:58,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1727 transitions. [2022-11-18 20:29:58,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.5) internal successors, (1727), 22 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:58,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:58,764 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:58,764 INFO L175 Difference]: Start difference. First operand has 264 places, 182 transitions, 1370 flow. Second operand 22 states and 1727 transitions. [2022-11-18 20:29:58,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 212 transitions, 1969 flow [2022-11-18 20:29:58,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 212 transitions, 1781 flow, removed 17 selfloop flow, removed 30 redundant places. [2022-11-18 20:29:58,840 INFO L231 Difference]: Finished difference. Result has 235 places, 183 transitions, 1332 flow [2022-11-18 20:29:58,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1332, PETRI_PLACES=235, PETRI_TRANSITIONS=183} [2022-11-18 20:29:58,841 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 115 predicate places. [2022-11-18 20:29:58,841 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 183 transitions, 1332 flow [2022-11-18 20:29:58,842 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) [2022-11-18 20:29:58,842 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:58,843 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] [2022-11-18 20:29:58,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:59,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:29:59,048 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:29:59,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:59,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1772825954, now seen corresponding path program 2 times [2022-11-18 20:29:59,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:59,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137404427] [2022-11-18 20:29:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:59,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:59,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137404427] [2022-11-18 20:29:59,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137404427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:59,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569830204] [2022-11-18 20:29:59,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:59,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:59,701 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:59,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:29:59,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:59,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:29:59,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:00,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:30:00,220 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-18 20:30:00,220 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 [2022-11-18 20:30:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:00,463 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 [2022-11-18 20:30:00,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:00,519 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 [2022-11-18 20:30:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:00,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:00,650 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_547 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_547) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2022-11-18 20:30:00,667 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_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2022-11-18 20:30:01,358 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-18 20:30:01,359 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 [2022-11-18 20:30:01,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:01,367 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 [2022-11-18 20:30:01,371 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 [2022-11-18 20:30:01,376 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 [2022-11-18 20:30:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:03,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569830204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:03,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:03,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-18 20:30:03,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683315122] [2022-11-18 20:30:03,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:03,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 20:30:03,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:03,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 20:30:03,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1857, Unknown=28, NotChecked=178, Total=2256 [2022-11-18 20:30:03,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 142 [2022-11-18 20:30:03,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 183 transitions, 1332 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) [2022-11-18 20:30:03,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:03,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 142 [2022-11-18 20:30:03,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:07,085 INFO L130 PetriNetUnfolder]: 2016/6040 cut-off events. [2022-11-18 20:30:07,085 INFO L131 PetriNetUnfolder]: For 25897/26215 co-relation queries the response was YES. [2022-11-18 20:30:07,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21105 conditions, 6040 events. 2016/6040 cut-off events. For 25897/26215 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 59359 event pairs, 505 based on Foata normal form. 148/5873 useless extension candidates. Maximal degree in co-relation 21059. Up to 1622 conditions per place. [2022-11-18 20:30:07,128 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 96 selfloop transitions, 32 changer transitions 0/210 dead transitions. [2022-11-18 20:30:07,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 210 transitions, 1875 flow [2022-11-18 20:30:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:30:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:30:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1648 transitions. [2022-11-18 20:30:07,131 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5526492287055668 [2022-11-18 20:30:07,131 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1648 transitions. [2022-11-18 20:30:07,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1648 transitions. [2022-11-18 20:30:07,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:07,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1648 transitions. [2022-11-18 20:30:07,133 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) [2022-11-18 20:30:07,134 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) [2022-11-18 20:30:07,135 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) [2022-11-18 20:30:07,135 INFO L175 Difference]: Start difference. First operand has 235 places, 183 transitions, 1332 flow. Second operand 21 states and 1648 transitions. [2022-11-18 20:30:07,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 210 transitions, 1875 flow [2022-11-18 20:30:07,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 210 transitions, 1790 flow, removed 0 selfloop flow, removed 20 redundant places. [2022-11-18 20:30:07,160 INFO L231 Difference]: Finished difference. Result has 235 places, 182 transitions, 1307 flow [2022-11-18 20:30:07,160 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1307, PETRI_PLACES=235, PETRI_TRANSITIONS=182} [2022-11-18 20:30:07,160 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 115 predicate places. [2022-11-18 20:30:07,161 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 182 transitions, 1307 flow [2022-11-18 20:30:07,161 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) [2022-11-18 20:30:07,161 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:07,161 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] [2022-11-18 20:30:07,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:07,362 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:30:07,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:07,362 INFO L85 PathProgramCache]: Analyzing trace with hash 965574777, now seen corresponding path program 1 times [2022-11-18 20:30:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:07,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610559146] [2022-11-18 20:30:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:08,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:08,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610559146] [2022-11-18 20:30:08,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610559146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193532968] [2022-11-18 20:30:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:08,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:08,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:08,155 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:08,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:30:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:08,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:30:08,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:08,538 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 [2022-11-18 20:30:08,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:08,725 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 [2022-11-18 20:30:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:08,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:09,107 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_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 4294967295)) is different from false [2022-11-18 20:30:09,121 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_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 4294967295)) is different from false [2022-11-18 20:30:09,126 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 [2022-11-18 20:30:09,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:09,163 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 [2022-11-18 20:30:09,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:09,172 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 [2022-11-18 20:30:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-18 20:30:09,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193532968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:09,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:09,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-11-18 20:30:09,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896434583] [2022-11-18 20:30:09,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:09,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 20:30:09,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:09,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 20:30:09,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1730, Unknown=7, NotChecked=258, Total=2162 [2022-11-18 20:30:09,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 142 [2022-11-18 20:30:09,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 182 transitions, 1307 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) [2022-11-18 20:30:09,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:09,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 142 [2022-11-18 20:30:09,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:13,273 INFO L130 PetriNetUnfolder]: 2625/7169 cut-off events. [2022-11-18 20:30:13,273 INFO L131 PetriNetUnfolder]: For 20649/21151 co-relation queries the response was YES. [2022-11-18 20:30:13,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23585 conditions, 7169 events. 2625/7169 cut-off events. For 20649/21151 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 72427 event pairs, 1543 based on Foata normal form. 379/6873 useless extension candidates. Maximal degree in co-relation 23540. Up to 2976 conditions per place. [2022-11-18 20:30:13,351 INFO L137 encePairwiseOnDemand]: 119/142 looper letters, 113 selfloop transitions, 57 changer transitions 0/233 dead transitions. [2022-11-18 20:30:13,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 233 transitions, 1914 flow [2022-11-18 20:30:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:30:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-18 20:30:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2003 transitions. [2022-11-18 20:30:13,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5425243770314193 [2022-11-18 20:30:13,355 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2003 transitions. [2022-11-18 20:30:13,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2003 transitions. [2022-11-18 20:30:13,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:13,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2003 transitions. [2022-11-18 20:30:13,359 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) [2022-11-18 20:30:13,363 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) [2022-11-18 20:30:13,364 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) [2022-11-18 20:30:13,364 INFO L175 Difference]: Start difference. First operand has 235 places, 182 transitions, 1307 flow. Second operand 26 states and 2003 transitions. [2022-11-18 20:30:13,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 233 transitions, 1914 flow [2022-11-18 20:30:13,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 233 transitions, 1854 flow, removed 2 selfloop flow, removed 19 redundant places. [2022-11-18 20:30:13,413 INFO L231 Difference]: Finished difference. Result has 247 places, 194 transitions, 1520 flow [2022-11-18 20:30:13,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1520, PETRI_PLACES=247, PETRI_TRANSITIONS=194} [2022-11-18 20:30:13,414 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 127 predicate places. [2022-11-18 20:30:13,414 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 194 transitions, 1520 flow [2022-11-18 20:30:13,415 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) [2022-11-18 20:30:13,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:13,415 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] [2022-11-18 20:30:13,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:13,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:30:13,617 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:30:13,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:13,618 INFO L85 PathProgramCache]: Analyzing trace with hash 965574774, now seen corresponding path program 2 times [2022-11-18 20:30:13,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:13,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421353872] [2022-11-18 20:30:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:13,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:14,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:14,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421353872] [2022-11-18 20:30:14,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421353872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:14,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411335946] [2022-11-18 20:30:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:30:14,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:14,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:14,319 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:14,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:30:14,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:30:14,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:14,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:30:14,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:14,719 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 [2022-11-18 20:30:14,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:14,899 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 [2022-11-18 20:30:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:15,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:15,195 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_601) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-18 20:30:15,208 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_601) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 9223372039002259456))) is different from false [2022-11-18 20:30:15,216 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_601) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 9223372039002259456))) is different from false [2022-11-18 20:30:15,222 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_601) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-11-18 20:30:15,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:15,248 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 [2022-11-18 20:30:15,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:15,256 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 [2022-11-18 20:30:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-18 20:30:15,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411335946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:15,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:15,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-11-18 20:30:15,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131219567] [2022-11-18 20:30:15,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:15,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 20:30:15,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:15,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 20:30:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1651, Unknown=4, NotChecked=340, Total=2162 [2022-11-18 20:30:15,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 142 [2022-11-18 20:30:15,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 194 transitions, 1520 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) [2022-11-18 20:30:15,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:15,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 142 [2022-11-18 20:30:15,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:19,409 INFO L130 PetriNetUnfolder]: 2618/7059 cut-off events. [2022-11-18 20:30:19,409 INFO L131 PetriNetUnfolder]: For 22363/22853 co-relation queries the response was YES. [2022-11-18 20:30:19,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23397 conditions, 7059 events. 2618/7059 cut-off events. For 22363/22853 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 70888 event pairs, 1515 based on Foata normal form. 379/6773 useless extension candidates. Maximal degree in co-relation 23347. Up to 2925 conditions per place. [2022-11-18 20:30:19,495 INFO L137 encePairwiseOnDemand]: 119/142 looper letters, 120 selfloop transitions, 55 changer transitions 0/238 dead transitions. [2022-11-18 20:30:19,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 238 transitions, 2027 flow [2022-11-18 20:30:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:30:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 20:30:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2080 transitions. [2022-11-18 20:30:19,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5425143453312468 [2022-11-18 20:30:19,499 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2080 transitions. [2022-11-18 20:30:19,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2080 transitions. [2022-11-18 20:30:19,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:19,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2080 transitions. [2022-11-18 20:30:19,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 77.03703703703704) internal successors, (2080), 27 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:19,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:19,505 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:19,505 INFO L175 Difference]: Start difference. First operand has 247 places, 194 transitions, 1520 flow. Second operand 27 states and 2080 transitions. [2022-11-18 20:30:19,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 238 transitions, 2027 flow [2022-11-18 20:30:19,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 238 transitions, 1870 flow, removed 5 selfloop flow, removed 18 redundant places. [2022-11-18 20:30:19,547 INFO L231 Difference]: Finished difference. Result has 255 places, 192 transitions, 1447 flow [2022-11-18 20:30:19,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1447, PETRI_PLACES=255, PETRI_TRANSITIONS=192} [2022-11-18 20:30:19,548 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 135 predicate places. [2022-11-18 20:30:19,548 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 192 transitions, 1447 flow [2022-11-18 20:30:19,549 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) [2022-11-18 20:30:19,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:19,549 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] [2022-11-18 20:30:19,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:19,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:30:19,755 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:30:19,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:19,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1786961977, now seen corresponding path program 2 times [2022-11-18 20:30:19,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:19,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260263484] [2022-11-18 20:30:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:19,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:19,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:19,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260263484] [2022-11-18 20:30:19,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260263484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:19,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675867007] [2022-11-18 20:30:19,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:30:19,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:19,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:19,911 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:19,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:30:20,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:30:20,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:20,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:30:20,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 20:30:20,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 20:30:20,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675867007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:20,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:20,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-18 20:30:20,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671458412] [2022-11-18 20:30:20,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:20,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:30:20,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:20,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:30:20,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:30:20,348 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 142 [2022-11-18 20:30:20,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 192 transitions, 1447 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) [2022-11-18 20:30:20,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:20,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 142 [2022-11-18 20:30:20,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:21,770 INFO L130 PetriNetUnfolder]: 1093/5073 cut-off events. [2022-11-18 20:30:21,771 INFO L131 PetriNetUnfolder]: For 15643/15804 co-relation queries the response was YES. [2022-11-18 20:30:21,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15877 conditions, 5073 events. 1093/5073 cut-off events. For 15643/15804 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 49484 event pairs, 626 based on Foata normal form. 7/4947 useless extension candidates. Maximal degree in co-relation 15827. Up to 416 conditions per place. [2022-11-18 20:30:21,818 INFO L137 encePairwiseOnDemand]: 131/142 looper letters, 141 selfloop transitions, 25 changer transitions 0/289 dead transitions. [2022-11-18 20:30:21,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 289 transitions, 2488 flow [2022-11-18 20:30:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:30:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 20:30:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2311 transitions. [2022-11-18 20:30:21,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6781103286384976 [2022-11-18 20:30:21,822 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2311 transitions. [2022-11-18 20:30:21,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2311 transitions. [2022-11-18 20:30:21,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:21,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2311 transitions. [2022-11-18 20:30:21,826 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) [2022-11-18 20:30:21,830 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) [2022-11-18 20:30:21,830 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) [2022-11-18 20:30:21,831 INFO L175 Difference]: Start difference. First operand has 255 places, 192 transitions, 1447 flow. Second operand 24 states and 2311 transitions. [2022-11-18 20:30:21,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 289 transitions, 2488 flow [2022-11-18 20:30:21,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 289 transitions, 2333 flow, removed 1 selfloop flow, removed 27 redundant places. [2022-11-18 20:30:21,879 INFO L231 Difference]: Finished difference. Result has 251 places, 196 transitions, 1413 flow [2022-11-18 20:30:21,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1413, PETRI_PLACES=251, PETRI_TRANSITIONS=196} [2022-11-18 20:30:21,880 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 131 predicate places. [2022-11-18 20:30:21,881 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 196 transitions, 1413 flow [2022-11-18 20:30:21,881 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) [2022-11-18 20:30:21,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:21,881 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] [2022-11-18 20:30:21,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:22,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:30:22,087 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:30:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:22,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2042862662, now seen corresponding path program 1 times [2022-11-18 20:30:22,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:22,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090406422] [2022-11-18 20:30:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:22,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:30:22,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:22,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090406422] [2022-11-18 20:30:22,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090406422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:22,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539870301] [2022-11-18 20:30:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:22,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:22,165 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:22,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:30:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:30:22,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:30:22,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:30:22,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539870301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:22,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:22,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 20:30:22,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559483080] [2022-11-18 20:30:22,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:22,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:30:22,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:22,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:30:22,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:30:22,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-18 20:30:22,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 196 transitions, 1413 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) [2022-11-18 20:30:22,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:22,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-18 20:30:22,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:25,790 INFO L130 PetriNetUnfolder]: 4323/13879 cut-off events. [2022-11-18 20:30:25,790 INFO L131 PetriNetUnfolder]: For 40521/41694 co-relation queries the response was YES. [2022-11-18 20:30:25,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46476 conditions, 13879 events. 4323/13879 cut-off events. For 40521/41694 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 157474 event pairs, 478 based on Foata normal form. 1093/13944 useless extension candidates. Maximal degree in co-relation 46430. Up to 2158 conditions per place. [2022-11-18 20:30:25,914 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 166 selfloop transitions, 43 changer transitions 0/349 dead transitions. [2022-11-18 20:30:25,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 349 transitions, 2982 flow [2022-11-18 20:30:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:30:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:30:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2057 transitions. [2022-11-18 20:30:25,917 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.804773082942097 [2022-11-18 20:30:25,917 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2057 transitions. [2022-11-18 20:30:25,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2057 transitions. [2022-11-18 20:30:25,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:25,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2057 transitions. [2022-11-18 20:30:25,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 114.27777777777777) internal successors, (2057), 18 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:25,921 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) [2022-11-18 20:30:25,921 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) [2022-11-18 20:30:25,921 INFO L175 Difference]: Start difference. First operand has 251 places, 196 transitions, 1413 flow. Second operand 18 states and 2057 transitions. [2022-11-18 20:30:25,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 349 transitions, 2982 flow [2022-11-18 20:30:26,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 349 transitions, 2929 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-18 20:30:26,029 INFO L231 Difference]: Finished difference. Result has 255 places, 222 transitions, 1802 flow [2022-11-18 20:30:26,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1802, PETRI_PLACES=255, PETRI_TRANSITIONS=222} [2022-11-18 20:30:26,030 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 135 predicate places. [2022-11-18 20:30:26,030 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 222 transitions, 1802 flow [2022-11-18 20:30:26,030 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) [2022-11-18 20:30:26,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:26,031 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] [2022-11-18 20:30:26,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:26,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:26,231 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:30:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1095766306, now seen corresponding path program 1 times [2022-11-18 20:30:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:26,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587276402] [2022-11-18 20:30:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:26,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:30:26,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:26,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587276402] [2022-11-18 20:30:26,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587276402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:26,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5100100] [2022-11-18 20:30:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:26,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:26,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:26,331 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:26,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:30:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:26,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:30:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:30:26,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:30:26,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5100100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:26,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:30:26,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 20:30:26,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238169739] [2022-11-18 20:30:26,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:26,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:30:26,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:30:26,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:30:26,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-18 20:30:26,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 222 transitions, 1802 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) [2022-11-18 20:30:26,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:26,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-18 20:30:26,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:29,595 INFO L130 PetriNetUnfolder]: 3968/12708 cut-off events. [2022-11-18 20:30:29,595 INFO L131 PetriNetUnfolder]: For 46095/47047 co-relation queries the response was YES. [2022-11-18 20:30:29,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45725 conditions, 12708 events. 3968/12708 cut-off events. For 46095/47047 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 142518 event pairs, 449 based on Foata normal form. 1134/12837 useless extension candidates. Maximal degree in co-relation 45676. Up to 3540 conditions per place. [2022-11-18 20:30:29,719 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 87 selfloop transitions, 21 changer transitions 0/248 dead transitions. [2022-11-18 20:30:29,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 248 transitions, 2142 flow [2022-11-18 20:30:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:30:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:30:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 798 transitions. [2022-11-18 20:30:29,721 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8028169014084507 [2022-11-18 20:30:29,721 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 798 transitions. [2022-11-18 20:30:29,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 798 transitions. [2022-11-18 20:30:29,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:29,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 798 transitions. [2022-11-18 20:30:29,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:29,723 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) [2022-11-18 20:30:29,723 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) [2022-11-18 20:30:29,723 INFO L175 Difference]: Start difference. First operand has 255 places, 222 transitions, 1802 flow. Second operand 7 states and 798 transitions. [2022-11-18 20:30:29,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 248 transitions, 2142 flow [2022-11-18 20:30:29,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 248 transitions, 2044 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-11-18 20:30:29,821 INFO L231 Difference]: Finished difference. Result has 251 places, 218 transitions, 1719 flow [2022-11-18 20:30:29,821 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1719, PETRI_PLACES=251, PETRI_TRANSITIONS=218} [2022-11-18 20:30:29,821 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 131 predicate places. [2022-11-18 20:30:29,822 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 218 transitions, 1719 flow [2022-11-18 20:30:29,822 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) [2022-11-18 20:30:29,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:29,822 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] [2022-11-18 20:30:29,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-18 20:30:30,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:30,023 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:30:30,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:30,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2010991640, now seen corresponding path program 1 times [2022-11-18 20:30:30,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:30,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439544648] [2022-11-18 20:30:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:30,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:30,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439544648] [2022-11-18 20:30:30,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439544648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239931936] [2022-11-18 20:30:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:30,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:30,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:30,898 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:30,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:30:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:31,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:30:31,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:31,050 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 [2022-11-18 20:30:31,134 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:30:31,135 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 [2022-11-18 20:30:31,403 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 [2022-11-18 20:30:31,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:31,648 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 [2022-11-18 20:30:31,774 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 [2022-11-18 20:30:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:31,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:32,041 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-18 20:30:32,130 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_714 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-18 20:30:32,150 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_714 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 9223372039002259456))) is different from false [2022-11-18 20:30:32,159 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_714 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 9223372039002259456))) is different from false [2022-11-18 20:30:32,166 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_714 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-11-18 20:30:32,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:32,199 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 [2022-11-18 20:30:32,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:32,208 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 [2022-11-18 20:30:32,216 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 [2022-11-18 20:30:32,221 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 [2022-11-18 20:30:32,868 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 [2022-11-18 20:30:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-11-18 20:30:32,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239931936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:32,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:32,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-18 20:30:32,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890756349] [2022-11-18 20:30:32,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:32,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 20:30:32,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:32,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 20:30:32,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1994, Unknown=9, NotChecked=470, Total=2652 [2022-11-18 20:30:32,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 142 [2022-11-18 20:30:32,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 218 transitions, 1719 flow. Second operand has 52 states, 52 states have (on average 69.61538461538461) internal successors, (3620), 52 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:32,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:32,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 142 [2022-11-18 20:30:32,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:42,850 INFO L130 PetriNetUnfolder]: 11706/31508 cut-off events. [2022-11-18 20:30:42,850 INFO L131 PetriNetUnfolder]: For 86063/87788 co-relation queries the response was YES. [2022-11-18 20:30:43,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102742 conditions, 31508 events. 11706/31508 cut-off events. For 86063/87788 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 370565 event pairs, 5134 based on Foata normal form. 1388/30391 useless extension candidates. Maximal degree in co-relation 102694. Up to 10057 conditions per place. [2022-11-18 20:30:43,197 INFO L137 encePairwiseOnDemand]: 119/142 looper letters, 191 selfloop transitions, 66 changer transitions 0/317 dead transitions. [2022-11-18 20:30:43,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 317 transitions, 2735 flow [2022-11-18 20:30:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:30:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-18 20:30:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1843 transitions. [2022-11-18 20:30:43,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5191549295774648 [2022-11-18 20:30:43,200 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1843 transitions. [2022-11-18 20:30:43,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1843 transitions. [2022-11-18 20:30:43,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:43,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1843 transitions. [2022-11-18 20:30:43,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 73.72) internal successors, (1843), 25 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:43,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 142.0) internal successors, (3692), 26 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:43,207 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 142.0) internal successors, (3692), 26 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:43,207 INFO L175 Difference]: Start difference. First operand has 251 places, 218 transitions, 1719 flow. Second operand 25 states and 1843 transitions. [2022-11-18 20:30:43,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 317 transitions, 2735 flow [2022-11-18 20:30:43,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 317 transitions, 2686 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 20:30:43,458 INFO L231 Difference]: Finished difference. Result has 274 places, 223 transitions, 1911 flow [2022-11-18 20:30:43,458 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1911, PETRI_PLACES=274, PETRI_TRANSITIONS=223} [2022-11-18 20:30:43,458 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 154 predicate places. [2022-11-18 20:30:43,459 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 223 transitions, 1911 flow [2022-11-18 20:30:43,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 69.61538461538461) internal successors, (3620), 52 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:43,459 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:43,459 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] [2022-11-18 20:30:43,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:43,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-18 20:30:43,660 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:30:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:43,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2062249693, now seen corresponding path program 1 times [2022-11-18 20:30:43,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:43,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515694447] [2022-11-18 20:30:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:43,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:44,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:44,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515694447] [2022-11-18 20:30:44,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515694447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:44,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368053435] [2022-11-18 20:30:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:44,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:44,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:44,710 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:44,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:30:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:44,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-18 20:30:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:44,879 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 [2022-11-18 20:30:44,964 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:30:44,964 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 [2022-11-18 20:30:45,209 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 [2022-11-18 20:30:45,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:45,480 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 [2022-11-18 20:30:45,609 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 [2022-11-18 20:30:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:45,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:45,868 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_747 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-18 20:30:46,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:46,394 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 [2022-11-18 20:30:46,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:46,404 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 [2022-11-18 20:30:46,411 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 [2022-11-18 20:30:46,417 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 [2022-11-18 20:30:47,062 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 [2022-11-18 20:30:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-18 20:30:47,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368053435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:47,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:47,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-18 20:30:47,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122338721] [2022-11-18 20:30:47,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:47,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 20:30:47,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:47,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 20:30:47,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2312, Unknown=55, NotChecked=98, Total=2652 [2022-11-18 20:30:47,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 142 [2022-11-18 20:30:47,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 223 transitions, 1911 flow. Second operand has 52 states, 52 states have (on average 69.61538461538461) internal successors, (3620), 52 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:47,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:47,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 142 [2022-11-18 20:30:47,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:57,739 INFO L130 PetriNetUnfolder]: 11628/31455 cut-off events. [2022-11-18 20:30:57,739 INFO L131 PetriNetUnfolder]: For 96594/98295 co-relation queries the response was YES. [2022-11-18 20:30:58,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103509 conditions, 31455 events. 11628/31455 cut-off events. For 96594/98295 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 370245 event pairs, 5101 based on Foata normal form. 1378/30412 useless extension candidates. Maximal degree in co-relation 103457. Up to 10196 conditions per place. [2022-11-18 20:30:58,109 INFO L137 encePairwiseOnDemand]: 117/142 looper letters, 199 selfloop transitions, 69 changer transitions 0/328 dead transitions. [2022-11-18 20:30:58,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 328 transitions, 2934 flow [2022-11-18 20:30:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:30:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-18 20:30:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2122 transitions. [2022-11-18 20:30:58,112 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5152986886838271 [2022-11-18 20:30:58,112 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2122 transitions. [2022-11-18 20:30:58,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2122 transitions. [2022-11-18 20:30:58,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:58,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2122 transitions. [2022-11-18 20:30:58,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 73.17241379310344) internal successors, (2122), 29 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:58,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 142.0) internal successors, (4260), 30 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:58,119 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 142.0) internal successors, (4260), 30 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:58,119 INFO L175 Difference]: Start difference. First operand has 274 places, 223 transitions, 1911 flow. Second operand 29 states and 2122 transitions. [2022-11-18 20:30:58,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 328 transitions, 2934 flow [2022-11-18 20:30:58,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 328 transitions, 2863 flow, removed 6 selfloop flow, removed 17 redundant places. [2022-11-18 20:30:58,367 INFO L231 Difference]: Finished difference. Result has 285 places, 222 transitions, 1970 flow [2022-11-18 20:30:58,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1970, PETRI_PLACES=285, PETRI_TRANSITIONS=222} [2022-11-18 20:30:58,368 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 165 predicate places. [2022-11-18 20:30:58,368 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 222 transitions, 1970 flow [2022-11-18 20:30:58,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 69.61538461538461) internal successors, (3620), 52 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:58,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:58,368 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:58,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:58,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:58,569 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:30:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1634159385, now seen corresponding path program 3 times [2022-11-18 20:30:58,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:58,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488304169] [2022-11-18 20:30:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:58,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:59,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:59,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488304169] [2022-11-18 20:30:59,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488304169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:59,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455231520] [2022-11-18 20:30:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:30:59,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:59,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:59,793 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:59,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:30:59,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:30:59,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 20:30:59,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:00,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:31:00,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:00,454 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 23 treesize of output 22 [2022-11-18 20:31:00,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:00,665 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 23 treesize of output 22 [2022-11-18 20:31:00,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:00,954 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 [2022-11-18 20:31:01,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:01,096 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 [2022-11-18 20:31:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:01,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:01,183 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_787) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 4294967295)) is different from false [2022-11-18 20:31:01,204 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_787) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-18 20:31:01,287 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int)) (v_ArrVal_786 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_786) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_787) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 4294967295)) is different from false [2022-11-18 20:31:01,298 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int)) (v_ArrVal_786 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_786) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_787) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 4294967295)) is different from false [2022-11-18 20:31:03,658 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int)) (v_ArrVal_784 Int) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_81| Int) (v_ArrVal_786 (Array Int Int))) (or (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_81| (+ |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_81| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_784)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_786) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_787) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295))) is different from false [2022-11-18 20:31:14,039 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int)) (v_ArrVal_784 Int) (v_ArrVal_782 Int) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_81| Int) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_82| Int) (v_ArrVal_786 (Array Int Int))) (or (<= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (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_82| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_782) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_81| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_784)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_786) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_787) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295) (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_81| (+ |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_82| 1)) (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_82| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)))) is different from false [2022-11-18 20:31:14,100 INFO L321 Elim1Store]: treesize reduction 94, result has 28.2 percent of original size [2022-11-18 20:31:14,100 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 3 case distinctions, treesize of input 39 treesize of output 50 [2022-11-18 20:31:14,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:31:14,113 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 [2022-11-18 20:31:14,121 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 53 treesize of output 49 [2022-11-18 20:31:14,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-11-18 20:31:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-18 20:31:18,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455231520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:18,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:18,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 53 [2022-11-18 20:31:18,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966448017] [2022-11-18 20:31:18,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:18,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-18 20:31:18,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:18,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-18 20:31:18,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2006, Unknown=26, NotChecked=582, Total=2862 [2022-11-18 20:31:18,571 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 142 [2022-11-18 20:31:18,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 222 transitions, 1970 flow. Second operand has 54 states, 54 states have (on average 77.53703703703704) internal successors, (4187), 54 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:18,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:18,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 142 [2022-11-18 20:31:18,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:25,075 INFO L130 PetriNetUnfolder]: 6713/21891 cut-off events. [2022-11-18 20:31:25,075 INFO L131 PetriNetUnfolder]: For 97539/98517 co-relation queries the response was YES. [2022-11-18 20:31:25,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74378 conditions, 21891 events. 6713/21891 cut-off events. For 97539/98517 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 262914 event pairs, 3355 based on Foata normal form. 774/21208 useless extension candidates. Maximal degree in co-relation 74327. Up to 5495 conditions per place. [2022-11-18 20:31:25,326 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 92 selfloop transitions, 77 changer transitions 0/242 dead transitions. [2022-11-18 20:31:25,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 242 transitions, 2382 flow [2022-11-18 20:31:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:31:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 20:31:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1882 transitions. [2022-11-18 20:31:25,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5522300469483568 [2022-11-18 20:31:25,328 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1882 transitions. [2022-11-18 20:31:25,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1882 transitions. [2022-11-18 20:31:25,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:25,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1882 transitions. [2022-11-18 20:31:25,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 78.41666666666667) internal successors, (1882), 24 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:25,333 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) [2022-11-18 20:31:25,334 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) [2022-11-18 20:31:25,334 INFO L175 Difference]: Start difference. First operand has 285 places, 222 transitions, 1970 flow. Second operand 24 states and 1882 transitions. [2022-11-18 20:31:25,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 242 transitions, 2382 flow [2022-11-18 20:31:25,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 242 transitions, 2187 flow, removed 1 selfloop flow, removed 29 redundant places. [2022-11-18 20:31:25,517 INFO L231 Difference]: Finished difference. Result has 279 places, 221 transitions, 1916 flow [2022-11-18 20:31:25,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1916, PETRI_PLACES=279, PETRI_TRANSITIONS=221} [2022-11-18 20:31:25,518 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 159 predicate places. [2022-11-18 20:31:25,518 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 221 transitions, 1916 flow [2022-11-18 20:31:25,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 77.53703703703704) internal successors, (4187), 54 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:25,519 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:25,519 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] [2022-11-18 20:31:25,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:25,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:25,719 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:31:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1278539894, now seen corresponding path program 1 times [2022-11-18 20:31:25,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:25,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14679169] [2022-11-18 20:31:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:25,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:26,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:26,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14679169] [2022-11-18 20:31:26,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14679169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:26,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623620037] [2022-11-18 20:31:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:26,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:26,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:26,476 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:26,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:31:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:26,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:31:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:26,639 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 [2022-11-18 20:31:26,717 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:31:26,717 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 [2022-11-18 20:31:26,965 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 [2022-11-18 20:31:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:27,202 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 [2022-11-18 20:31:27,257 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 [2022-11-18 20:31:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:27,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:27,559 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_820 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_820) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456)) is different from false [2022-11-18 20:31:27,942 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_820 (Array Int Int)) (v_ArrVal_819 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_819) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_820) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2022-11-18 20:31:27,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:31:27,968 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 [2022-11-18 20:31:27,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:31:27,975 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 [2022-11-18 20:31:27,981 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 [2022-11-18 20:31:27,986 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 [2022-11-18 20:31:28,535 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 [2022-11-18 20:31:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-18 20:31:28,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623620037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:28,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:28,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-18 20:31:28,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398285286] [2022-11-18 20:31:28,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:28,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 20:31:28,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 20:31:28,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2236, Unknown=24, NotChecked=194, Total=2652 [2022-11-18 20:31:28,577 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 142 [2022-11-18 20:31:28,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 221 transitions, 1916 flow. Second operand has 52 states, 52 states have (on average 69.67307692307692) internal successors, (3623), 52 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:28,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:28,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 142 [2022-11-18 20:31:28,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:39,537 INFO L130 PetriNetUnfolder]: 14530/34288 cut-off events. [2022-11-18 20:31:39,537 INFO L131 PetriNetUnfolder]: For 212250/212905 co-relation queries the response was YES. [2022-11-18 20:31:39,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124076 conditions, 34288 events. 14530/34288 cut-off events. For 212250/212905 co-relation queries the response was YES. Maximal size of possible extension queue 1111. Compared 394268 event pairs, 5271 based on Foata normal form. 147/31791 useless extension candidates. Maximal degree in co-relation 124028. Up to 11160 conditions per place. [2022-11-18 20:31:40,028 INFO L137 encePairwiseOnDemand]: 118/142 looper letters, 186 selfloop transitions, 35 changer transitions 0/321 dead transitions. [2022-11-18 20:31:40,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 321 transitions, 3174 flow [2022-11-18 20:31:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:31:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 20:31:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1972 transitions. [2022-11-18 20:31:40,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5143453312467396 [2022-11-18 20:31:40,032 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1972 transitions. [2022-11-18 20:31:40,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1972 transitions. [2022-11-18 20:31:40,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:40,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1972 transitions. [2022-11-18 20:31:40,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.03703703703704) internal successors, (1972), 27 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:40,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:40,038 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:40,038 INFO L175 Difference]: Start difference. First operand has 279 places, 221 transitions, 1916 flow. Second operand 27 states and 1972 transitions. [2022-11-18 20:31:40,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 321 transitions, 3174 flow [2022-11-18 20:31:40,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 321 transitions, 3084 flow, removed 2 selfloop flow, removed 22 redundant places. [2022-11-18 20:31:40,351 INFO L231 Difference]: Finished difference. Result has 287 places, 233 transitions, 2001 flow [2022-11-18 20:31:40,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2001, PETRI_PLACES=287, PETRI_TRANSITIONS=233} [2022-11-18 20:31:40,352 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 167 predicate places. [2022-11-18 20:31:40,352 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 233 transitions, 2001 flow [2022-11-18 20:31:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 69.67307692307692) internal successors, (3623), 52 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:40,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:40,353 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] [2022-11-18 20:31:40,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-18 20:31:40,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 20:31:40,553 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 20:31:40,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:40,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1278539891, now seen corresponding path program 2 times [2022-11-18 20:31:40,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:40,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434219093] [2022-11-18 20:31:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:41,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:41,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434219093] [2022-11-18 20:31:41,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434219093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:41,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116984603] [2022-11-18 20:31:41,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:31:41,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:41,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:41,545 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:41,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a925dac-6a08-4bfa-9268-eabc56c98253/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:31:41,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:31:41,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:41,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 20:31:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:42,039 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 [2022-11-18 20:31:42,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:42,276 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 [2022-11-18 20:31:42,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:42,336 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 [2022-11-18 20:31:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:42,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:42,679 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_852 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_852) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967296))) is different from false [2022-11-18 20:31:42,871 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_852 (Array Int Int)) (v_ArrVal_851 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_851) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_852) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 4294967296))) is different from false [2022-11-18 20:31:42,878 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_852 (Array Int Int)) (v_ArrVal_851 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_851) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_852) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2022-11-18 20:31:42,911 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:31:42,911 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 [2022-11-18 20:31:42,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:31:42,920 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 [2022-11-18 20:31:42,924 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 [2022-11-18 20:31:42,929 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 [2022-11-18 20:31:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-18 20:31:43,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116984603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:43,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:43,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-11-18 20:31:43,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595126149] [2022-11-18 20:31:43,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:43,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 20:31:43,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 20:31:43,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2244, Unknown=23, NotChecked=294, Total=2756 [2022-11-18 20:31:43,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 142 [2022-11-18 20:31:43,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 233 transitions, 2001 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) [2022-11-18 20:31:43,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:43,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 142 [2022-11-18 20:31:43,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand