./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 11:13:59,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:13:59,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:13:59,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:13:59,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:13:59,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:13:59,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:13:59,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:13:59,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:13:59,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:13:59,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:13:59,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:13:59,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:13:59,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:13:59,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:13:59,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:13:59,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:13:59,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:13:59,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:13:59,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:13:59,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:13:59,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:13:59,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:13:59,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:13:59,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:13:59,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:13:59,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:13:59,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:13:59,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:13:59,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:13:59,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:13:59,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:13:59,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:13:59,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:13:59,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:13:59,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:13:59,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:13:59,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:13:59,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:13:59,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:13:59,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:13:59,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:13:59,710 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:13:59,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:13:59,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:13:59,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:13:59,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:13:59,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:13:59,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:13:59,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:13:59,714 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:13:59,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:13:59,715 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:13:59,715 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:13:59,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:13:59,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:13:59,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:13:59,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:13:59,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:13:59,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:13:59,717 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:13:59,717 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:13:59,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:13:59,717 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:13:59,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:13:59,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:13:59,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:13:59,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:13:59,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:13:59,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:13:59,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:13:59,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:13:59,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:13:59,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:13:59,720 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:13:59,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:13:59,720 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:13:59,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:13:59,720 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:13:59,721 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:14:00,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:14:00,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:14:00,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:14:00,036 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:14:00,037 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:14:00,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-08-30 11:14:01,152 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:14:01,357 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:14:01,358 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-08-30 11:14:01,365 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61aa02d3e/e7f71fdba92346389887b697b6325f67/FLAGaac0f58af [2023-08-30 11:14:01,385 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61aa02d3e/e7f71fdba92346389887b697b6325f67 [2023-08-30 11:14:01,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:14:01,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:14:01,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:14:01,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:14:01,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:14:01,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab8ccbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01, skipping insertion in model container [2023-08-30 11:14:01,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:14:01,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:14:01,612 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c[2755,2768] [2023-08-30 11:14:01,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:14:01,640 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:14:01,683 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c[2755,2768] [2023-08-30 11:14:01,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:14:01,706 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:14:01,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01 WrapperNode [2023-08-30 11:14:01,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:14:01,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:14:01,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:14:01,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:14:01,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,771 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 405 [2023-08-30 11:14:01,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:14:01,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:14:01,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:14:01,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:14:01,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,833 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:14:01,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:14:01,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:14:01,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:14:01,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (1/1) ... [2023-08-30 11:14:01,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:14:01,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:01,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 11:14:01,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 11:14:01,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:14:01,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:14:01,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:14:01,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:14:01,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:14:01,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:14:01,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:14:01,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:14:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 11:14:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:14:01,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:14:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:14:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:14:01,930 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 11:14:02,042 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:14:02,044 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:14:02,670 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:14:02,683 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:14:02,685 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 11:14:02,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:14:02 BoogieIcfgContainer [2023-08-30 11:14:02,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:14:02,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:14:02,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:14:02,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:14:02,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:14:01" (1/3) ... [2023-08-30 11:14:02,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98c6010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:14:02, skipping insertion in model container [2023-08-30 11:14:02,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:01" (2/3) ... [2023-08-30 11:14:02,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98c6010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:14:02, skipping insertion in model container [2023-08-30 11:14:02,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:14:02" (3/3) ... [2023-08-30 11:14:02,697 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-08-30 11:14:02,704 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:14:02,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:14:02,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 54 error locations. [2023-08-30 11:14:02,713 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:14:02,867 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 11:14:02,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 495 places, 532 transitions, 1080 flow [2023-08-30 11:14:03,128 INFO L130 PetriNetUnfolder]: 44/530 cut-off events. [2023-08-30 11:14:03,129 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:14:03,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 530 events. 44/530 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1717 event pairs, 0 based on Foata normal form. 0/432 useless extension candidates. Maximal degree in co-relation 407. Up to 2 conditions per place. [2023-08-30 11:14:03,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 495 places, 532 transitions, 1080 flow [2023-08-30 11:14:03,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 478 places, 514 transitions, 1037 flow [2023-08-30 11:14:03,180 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:14:03,193 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 478 places, 514 transitions, 1037 flow [2023-08-30 11:14:03,199 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 478 places, 514 transitions, 1037 flow [2023-08-30 11:14:03,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 478 places, 514 transitions, 1037 flow [2023-08-30 11:14:03,313 INFO L130 PetriNetUnfolder]: 43/514 cut-off events. [2023-08-30 11:14:03,313 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:14:03,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 514 events. 43/514 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1629 event pairs, 0 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 407. Up to 2 conditions per place. [2023-08-30 11:14:03,357 INFO L119 LiptonReduction]: Number of co-enabled transitions 84348 [2023-08-30 11:14:43,731 INFO L134 LiptonReduction]: Checked pairs total: 82860 [2023-08-30 11:14:43,732 INFO L136 LiptonReduction]: Total number of compositions: 738 [2023-08-30 11:14:43,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:14:43,750 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;@6059523e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:14:43,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 108 error locations. [2023-08-30 11:14:43,752 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 11:14:43,753 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:14:43,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:43,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 11:14:43,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:14:43,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:43,758 INFO L85 PathProgramCache]: Analyzing trace with hash 75633, now seen corresponding path program 1 times [2023-08-30 11:14:43,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:43,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511759125] [2023-08-30 11:14:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:44,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:44,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511759125] [2023-08-30 11:14:44,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511759125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:14:44,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:14:44,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:14:44,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367403387] [2023-08-30 11:14:44,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:44,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:14:44,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:14:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:14:44,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 501 out of 1270 [2023-08-30 11:14:44,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 501.6666666666667) internal successors, (1505), 3 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:44,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:44,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 501 of 1270 [2023-08-30 11:14:44,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:45,393 INFO L130 PetriNetUnfolder]: 2101/3515 cut-off events. [2023-08-30 11:14:45,394 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-30 11:14:45,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7148 conditions, 3515 events. 2101/3515 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 22766 event pairs, 1884 based on Foata normal form. 0/1127 useless extension candidates. Maximal degree in co-relation 3426. Up to 1758 conditions per place. [2023-08-30 11:14:45,412 INFO L137 encePairwiseOnDemand]: 1244/1270 looper letters, 91 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-30 11:14:45,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 94 transitions, 392 flow [2023-08-30 11:14:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:14:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:14:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1642 transitions. [2023-08-30 11:14:45,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309711286089239 [2023-08-30 11:14:45,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1642 transitions. [2023-08-30 11:14:45,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1642 transitions. [2023-08-30 11:14:45,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:45,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1642 transitions. [2023-08-30 11:14:45,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 547.3333333333334) internal successors, (1642), 3 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:45,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:45,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:45,466 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 151 flow. Second operand 3 states and 1642 transitions. [2023-08-30 11:14:45,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 94 transitions, 392 flow [2023-08-30 11:14:45,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 94 transitions, 382 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:14:45,474 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 116 flow [2023-08-30 11:14:45,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-08-30 11:14:45,481 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -22 predicate places. [2023-08-30 11:14:45,481 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 116 flow [2023-08-30 11:14:45,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.6666666666667) internal successors, (1505), 3 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:45,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:45,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:14:45,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:14:45,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:14:45,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:45,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2348522, now seen corresponding path program 1 times [2023-08-30 11:14:45,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:45,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429037590] [2023-08-30 11:14:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:45,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:45,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429037590] [2023-08-30 11:14:45,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429037590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:14:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140724010] [2023-08-30 11:14:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:45,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:45,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:45,629 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:14:45,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 11:14:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:45,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:14:45,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:14:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:45,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:14:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:45,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140724010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:14:45,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:14:45,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:14:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90755935] [2023-08-30 11:14:45,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:14:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:14:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:14:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:14:45,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 501 out of 1270 [2023-08-30 11:14:45,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 502.14285714285717) internal successors, (3515), 7 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:45,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:45,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 501 of 1270 [2023-08-30 11:14:45,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:48,399 INFO L130 PetriNetUnfolder]: 5254/8786 cut-off events. [2023-08-30 11:14:48,399 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:14:48,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17793 conditions, 8786 events. 5254/8786 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 65290 event pairs, 4710 based on Foata normal form. 0/2821 useless extension candidates. Maximal degree in co-relation 14231. Up to 1757 conditions per place. [2023-08-30 11:14:48,443 INFO L137 encePairwiseOnDemand]: 1266/1270 looper letters, 222 selfloop transitions, 9 changer transitions 0/232 dead transitions. [2023-08-30 11:14:48,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 232 transitions, 970 flow [2023-08-30 11:14:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:14:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:14:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3741 transitions. [2023-08-30 11:14:48,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208098987626547 [2023-08-30 11:14:48,453 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3741 transitions. [2023-08-30 11:14:48,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3741 transitions. [2023-08-30 11:14:48,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:48,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3741 transitions. [2023-08-30 11:14:48,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 534.4285714285714) internal successors, (3741), 7 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:48,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1270.0) internal successors, (10160), 8 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:48,480 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1270.0) internal successors, (10160), 8 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:48,481 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 116 flow. Second operand 7 states and 3741 transitions. [2023-08-30 11:14:48,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 232 transitions, 970 flow [2023-08-30 11:14:48,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 232 transitions, 968 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:14:48,485 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 173 flow [2023-08-30 11:14:48,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-08-30 11:14:48,486 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -14 predicate places. [2023-08-30 11:14:48,486 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 173 flow [2023-08-30 11:14:48,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 502.14285714285717) internal successors, (3515), 7 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:48,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:48,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-30 11:14:48,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 11:14:48,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:48,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:14:48,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:48,694 INFO L85 PathProgramCache]: Analyzing trace with hash 72808080, now seen corresponding path program 1 times [2023-08-30 11:14:48,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:48,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854524440] [2023-08-30 11:14:48,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:48,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:14:48,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854524440] [2023-08-30 11:14:48,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854524440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:14:48,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:14:48,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:14:48,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413845384] [2023-08-30 11:14:48,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:48,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:14:48,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:14:48,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:14:48,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 501 out of 1270 [2023-08-30 11:14:48,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 502.3333333333333) internal successors, (1507), 3 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:48,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:48,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 501 of 1270 [2023-08-30 11:14:48,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:50,921 INFO L130 PetriNetUnfolder]: 5251/8782 cut-off events. [2023-08-30 11:14:50,922 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:14:50,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17795 conditions, 8782 events. 5251/8782 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 64948 event pairs, 4710 based on Foata normal form. 2/2824 useless extension candidates. Maximal degree in co-relation 10667. Up to 8772 conditions per place. [2023-08-30 11:14:50,958 INFO L137 encePairwiseOnDemand]: 1268/1270 looper letters, 50 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-30 11:14:50,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 248 flow [2023-08-30 11:14:50,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:14:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:14:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1551 transitions. [2023-08-30 11:14:50,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40708661417322833 [2023-08-30 11:14:50,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1551 transitions. [2023-08-30 11:14:50,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1551 transitions. [2023-08-30 11:14:50,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:50,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1551 transitions. [2023-08-30 11:14:50,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 517.0) internal successors, (1551), 3 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:50,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:50,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:50,977 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 173 flow. Second operand 3 states and 1551 transitions. [2023-08-30 11:14:50,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 248 flow [2023-08-30 11:14:50,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 240 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 11:14:50,981 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 140 flow [2023-08-30 11:14:50,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-08-30 11:14:50,983 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -15 predicate places. [2023-08-30 11:14:50,983 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 140 flow [2023-08-30 11:14:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.3333333333333) internal successors, (1507), 3 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:50,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:50,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:14:50,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 11:14:50,986 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err17ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:14:50,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:50,987 INFO L85 PathProgramCache]: Analyzing trace with hash 72892432, now seen corresponding path program 1 times [2023-08-30 11:14:50,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:50,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203049634] [2023-08-30 11:14:50,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:50,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:51,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:51,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203049634] [2023-08-30 11:14:51,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203049634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:14:51,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:14:51,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:14:51,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534733244] [2023-08-30 11:14:51,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:51,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:14:51,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:14:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:14:51,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1270 [2023-08-30 11:14:51,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:51,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:51,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1270 [2023-08-30 11:14:51,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:52,795 INFO L130 PetriNetUnfolder]: 4781/7992 cut-off events. [2023-08-30 11:14:52,796 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:14:52,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16193 conditions, 7992 events. 4781/7992 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 58086 event pairs, 4260 based on Foata normal form. 0/2632 useless extension candidates. Maximal degree in co-relation 16181. Up to 7982 conditions per place. [2023-08-30 11:14:52,826 INFO L137 encePairwiseOnDemand]: 1267/1270 looper letters, 48 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 11:14:52,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 234 flow [2023-08-30 11:14:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:14:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:14:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1547 transitions. [2023-08-30 11:14:52,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40603674540682416 [2023-08-30 11:14:52,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1547 transitions. [2023-08-30 11:14:52,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1547 transitions. [2023-08-30 11:14:52,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:52,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1547 transitions. [2023-08-30 11:14:52,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 515.6666666666666) internal successors, (1547), 3 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:52,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:52,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:52,841 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 140 flow. Second operand 3 states and 1547 transitions. [2023-08-30 11:14:52,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 234 flow [2023-08-30 11:14:52,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:14:52,843 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 137 flow [2023-08-30 11:14:52,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-30 11:14:52,844 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -16 predicate places. [2023-08-30 11:14:52,844 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 137 flow [2023-08-30 11:14:52,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:52,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:52,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:14:52,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 11:14:52,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err16ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:14:52,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:52,846 INFO L85 PathProgramCache]: Analyzing trace with hash 72892433, now seen corresponding path program 1 times [2023-08-30 11:14:52,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:52,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918984953] [2023-08-30 11:14:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:52,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:52,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:52,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918984953] [2023-08-30 11:14:52,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918984953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:14:52,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:14:52,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:14:52,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208143280] [2023-08-30 11:14:52,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:52,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:14:52,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:52,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:14:52,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:14:52,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1270 [2023-08-30 11:14:52,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:52,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:52,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1270 [2023-08-30 11:14:52,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:54,221 INFO L130 PetriNetUnfolder]: 4311/7202 cut-off events. [2023-08-30 11:14:54,221 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:14:54,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14594 conditions, 7202 events. 4311/7202 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 51323 event pairs, 3810 based on Foata normal form. 0/2442 useless extension candidates. Maximal degree in co-relation 14581. Up to 7192 conditions per place. [2023-08-30 11:14:54,259 INFO L137 encePairwiseOnDemand]: 1267/1270 looper letters, 46 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-30 11:14:54,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 227 flow [2023-08-30 11:14:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:14:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:14:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1545 transitions. [2023-08-30 11:14:54,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40551181102362205 [2023-08-30 11:14:54,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1545 transitions. [2023-08-30 11:14:54,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1545 transitions. [2023-08-30 11:14:54,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:54,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1545 transitions. [2023-08-30 11:14:54,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 515.0) internal successors, (1545), 3 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:54,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:54,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:54,276 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 137 flow. Second operand 3 states and 1545 transitions. [2023-08-30 11:14:54,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 227 flow [2023-08-30 11:14:54,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 48 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:14:54,278 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 134 flow [2023-08-30 11:14:54,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-08-30 11:14:54,279 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -17 predicate places. [2023-08-30 11:14:54,279 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 134 flow [2023-08-30 11:14:54,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:54,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:54,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:14:54,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 11:14:54,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err14ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:14:54,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash 72892435, now seen corresponding path program 1 times [2023-08-30 11:14:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:54,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277530813] [2023-08-30 11:14:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:54,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:54,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:54,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277530813] [2023-08-30 11:14:54,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277530813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:14:54,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:14:54,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:14:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378451526] [2023-08-30 11:14:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:54,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:14:54,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:14:54,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:14:54,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1270 [2023-08-30 11:14:54,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:54,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:54,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1270 [2023-08-30 11:14:54,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:56,364 INFO L130 PetriNetUnfolder]: 7451/12252 cut-off events. [2023-08-30 11:14:56,364 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:14:56,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24635 conditions, 12252 events. 7451/12252 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 90423 event pairs, 2910 based on Foata normal form. 0/4352 useless extension candidates. Maximal degree in co-relation 24621. Up to 6092 conditions per place. [2023-08-30 11:14:56,408 INFO L137 encePairwiseOnDemand]: 1260/1270 looper letters, 75 selfloop transitions, 6 changer transitions 0/82 dead transitions. [2023-08-30 11:14:56,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 367 flow [2023-08-30 11:14:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:14:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:14:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1581 transitions. [2023-08-30 11:14:56,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149606299212598 [2023-08-30 11:14:56,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1581 transitions. [2023-08-30 11:14:56,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1581 transitions. [2023-08-30 11:14:56,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:56,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1581 transitions. [2023-08-30 11:14:56,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:56,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:56,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:56,423 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 134 flow. Second operand 3 states and 1581 transitions. [2023-08-30 11:14:56,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 367 flow [2023-08-30 11:14:56,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:14:56,425 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 185 flow [2023-08-30 11:14:56,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-08-30 11:14:56,426 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -14 predicate places. [2023-08-30 11:14:56,426 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 185 flow [2023-08-30 11:14:56,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:56,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:56,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:14:56,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 11:14:56,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:14:56,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash 72892256, now seen corresponding path program 1 times [2023-08-30 11:14:56,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:56,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664834672] [2023-08-30 11:14:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:56,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:56,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664834672] [2023-08-30 11:14:56,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664834672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:14:56,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:14:56,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:14:56,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282496013] [2023-08-30 11:14:56,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:56,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:14:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:14:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:14:56,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1270 [2023-08-30 11:14:56,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:56,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:56,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1270 [2023-08-30 11:14:56,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:58,558 INFO L130 PetriNetUnfolder]: 6971/11772 cut-off events. [2023-08-30 11:14:58,558 INFO L131 PetriNetUnfolder]: For 1103/1103 co-relation queries the response was YES. [2023-08-30 11:14:58,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26238 conditions, 11772 events. 6971/11772 cut-off events. For 1103/1103 co-relation queries the response was YES. Maximal size of possible extension queue 978. Compared 91468 event pairs, 3135 based on Foata normal form. 160/5312 useless extension candidates. Maximal degree in co-relation 26221. Up to 6007 conditions per place. [2023-08-30 11:14:58,605 INFO L137 encePairwiseOnDemand]: 1260/1270 looper letters, 71 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-30 11:14:58,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 390 flow [2023-08-30 11:14:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:14:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:14:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1577 transitions. [2023-08-30 11:14:58,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41391076115485564 [2023-08-30 11:14:58,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1577 transitions. [2023-08-30 11:14:58,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1577 transitions. [2023-08-30 11:14:58,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:58,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1577 transitions. [2023-08-30 11:14:58,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.6666666666666) internal successors, (1577), 3 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:58,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:58,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:58,621 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 185 flow. Second operand 3 states and 1577 transitions. [2023-08-30 11:14:58,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 390 flow [2023-08-30 11:14:58,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 378 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:14:58,628 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 175 flow [2023-08-30 11:14:58,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2023-08-30 11:14:58,629 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -14 predicate places. [2023-08-30 11:14:58,629 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 175 flow [2023-08-30 11:14:58,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:58,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:58,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:14:58,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 11:14:58,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:14:58,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash 72892309, now seen corresponding path program 1 times [2023-08-30 11:14:58,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:58,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525611250] [2023-08-30 11:14:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:58,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:58,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525611250] [2023-08-30 11:14:58,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525611250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:14:58,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:14:58,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:14:58,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608907746] [2023-08-30 11:14:58,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:58,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:14:58,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:58,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:14:58,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:14:58,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1270 [2023-08-30 11:14:58,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:58,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:58,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1270 [2023-08-30 11:14:58,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:00,536 INFO L130 PetriNetUnfolder]: 5670/9487 cut-off events. [2023-08-30 11:15:00,536 INFO L131 PetriNetUnfolder]: For 1571/1571 co-relation queries the response was YES. [2023-08-30 11:15:00,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21388 conditions, 9487 events. 5670/9487 cut-off events. For 1571/1571 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 69881 event pairs, 4103 based on Foata normal form. 0/4107 useless extension candidates. Maximal degree in co-relation 21371. Up to 7539 conditions per place. [2023-08-30 11:15:00,572 INFO L137 encePairwiseOnDemand]: 1260/1270 looper letters, 83 selfloop transitions, 6 changer transitions 1/91 dead transitions. [2023-08-30 11:15:00,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 443 flow [2023-08-30 11:15:00,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:15:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:15:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2559 transitions. [2023-08-30 11:15:00,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402992125984252 [2023-08-30 11:15:00,579 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2559 transitions. [2023-08-30 11:15:00,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2559 transitions. [2023-08-30 11:15:00,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:00,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2559 transitions. [2023-08-30 11:15:00,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 511.8) internal successors, (2559), 5 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:00,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:00,594 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:00,594 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 175 flow. Second operand 5 states and 2559 transitions. [2023-08-30 11:15:00,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 443 flow [2023-08-30 11:15:00,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 11:15:00,596 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 212 flow [2023-08-30 11:15:00,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2023-08-30 11:15:00,597 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-08-30 11:15:00,597 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 212 flow [2023-08-30 11:15:00,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:00,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:00,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:15:00,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 11:15:00,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:00,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2037828658, now seen corresponding path program 1 times [2023-08-30 11:15:00,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:00,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615655715] [2023-08-30 11:15:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:00,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:00,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:00,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615655715] [2023-08-30 11:15:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615655715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:00,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462156878] [2023-08-30 11:15:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:00,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:00,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:00,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:15:00,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 11:15:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:01,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:15:01,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:01,124 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 [2023-08-30 11:15:01,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:15:01,208 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 [2023-08-30 11:15:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:01,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:01,284 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_136 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_136) |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 [2023-08-30 11:15:01,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:15:01,311 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 [2023-08-30 11:15:01,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:15:01,323 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 39 treesize of output 35 [2023-08-30 11:15:01,354 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 7 treesize of output 5 [2023-08-30 11:15:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 11:15:01,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462156878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:01,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:01,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-08-30 11:15:01,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374288800] [2023-08-30 11:15:01,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 11:15:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 11:15:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=67, Unknown=1, NotChecked=16, Total=110 [2023-08-30 11:15:01,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 470 out of 1270 [2023-08-30 11:15:01,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 212 flow. Second operand has 11 states, 11 states have (on average 471.3636363636364) internal successors, (5185), 11 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:01,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:01,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 470 of 1270 [2023-08-30 11:15:01,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:04,263 INFO L130 PetriNetUnfolder]: 8214/14419 cut-off events. [2023-08-30 11:15:04,263 INFO L131 PetriNetUnfolder]: For 2298/2298 co-relation queries the response was YES. [2023-08-30 11:15:04,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34381 conditions, 14419 events. 8214/14419 cut-off events. For 2298/2298 co-relation queries the response was YES. Maximal size of possible extension queue 1310. Compared 123500 event pairs, 2783 based on Foata normal form. 0/7267 useless extension candidates. Maximal degree in co-relation 34359. Up to 7573 conditions per place. [2023-08-30 11:15:04,313 INFO L137 encePairwiseOnDemand]: 1253/1270 looper letters, 101 selfloop transitions, 26 changer transitions 1/129 dead transitions. [2023-08-30 11:15:04,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 129 transitions, 712 flow [2023-08-30 11:15:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:15:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:15:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3413 transitions. [2023-08-30 11:15:04,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3839145106861642 [2023-08-30 11:15:04,321 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3413 transitions. [2023-08-30 11:15:04,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3413 transitions. [2023-08-30 11:15:04,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:04,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3413 transitions. [2023-08-30 11:15:04,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 487.57142857142856) internal successors, (3413), 7 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:04,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1270.0) internal successors, (10160), 8 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:04,339 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1270.0) internal successors, (10160), 8 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:04,339 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 212 flow. Second operand 7 states and 3413 transitions. [2023-08-30 11:15:04,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 129 transitions, 712 flow [2023-08-30 11:15:04,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 129 transitions, 708 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:04,347 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 401 flow [2023-08-30 11:15:04,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=401, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2023-08-30 11:15:04,348 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-08-30 11:15:04,348 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 401 flow [2023-08-30 11:15:04,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 471.3636363636364) internal successors, (5185), 11 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:04,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:04,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:15:04,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 11:15:04,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-30 11:15:04,556 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:04,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:04,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2037828593, now seen corresponding path program 1 times [2023-08-30 11:15:04,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:04,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323917949] [2023-08-30 11:15:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:04,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:04,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:04,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323917949] [2023-08-30 11:15:04,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323917949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:04,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612572512] [2023-08-30 11:15:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:04,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:04,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:04,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:15:04,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 11:15:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:05,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:15:05,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:05,031 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 [2023-08-30 11:15:05,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:15:05,099 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 [2023-08-30 11:15:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:05,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:05,149 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_165 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_165) |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 [2023-08-30 11:15:05,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:15:05,159 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 [2023-08-30 11:15:05,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:15:05,165 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 33 treesize of output 29 [2023-08-30 11:15:05,177 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 5 treesize of output 3 [2023-08-30 11:15:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 11:15:05,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612572512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:05,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:05,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-08-30 11:15:05,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163689574] [2023-08-30 11:15:05,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:05,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 11:15:05,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 11:15:05,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2023-08-30 11:15:05,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 461 out of 1270 [2023-08-30 11:15:05,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 401 flow. Second operand has 11 states, 11 states have (on average 462.3636363636364) internal successors, (5086), 11 states have internal predecessors, (5086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:05,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:05,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 461 of 1270 [2023-08-30 11:15:05,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:08,058 INFO L130 PetriNetUnfolder]: 8326/14777 cut-off events. [2023-08-30 11:15:08,058 INFO L131 PetriNetUnfolder]: For 12331/12331 co-relation queries the response was YES. [2023-08-30 11:15:08,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41658 conditions, 14777 events. 8326/14777 cut-off events. For 12331/12331 co-relation queries the response was YES. Maximal size of possible extension queue 1254. Compared 127006 event pairs, 3607 based on Foata normal form. 4/8425 useless extension candidates. Maximal degree in co-relation 41631. Up to 8797 conditions per place. [2023-08-30 11:15:08,127 INFO L137 encePairwiseOnDemand]: 1254/1270 looper letters, 108 selfloop transitions, 52 changer transitions 1/162 dead transitions. [2023-08-30 11:15:08,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 162 transitions, 1106 flow [2023-08-30 11:15:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 11:15:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 11:15:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 4757 transitions. [2023-08-30 11:15:08,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37456692913385825 [2023-08-30 11:15:08,137 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 4757 transitions. [2023-08-30 11:15:08,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 4757 transitions. [2023-08-30 11:15:08,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:08,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 4757 transitions. [2023-08-30 11:15:08,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 475.7) internal successors, (4757), 10 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:08,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1270.0) internal successors, (13970), 11 states have internal predecessors, (13970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:08,161 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1270.0) internal successors, (13970), 11 states have internal predecessors, (13970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:08,161 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 401 flow. Second operand 10 states and 4757 transitions. [2023-08-30 11:15:08,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 162 transitions, 1106 flow [2023-08-30 11:15:08,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 162 transitions, 1091 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:08,198 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 670 flow [2023-08-30 11:15:08,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=670, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2023-08-30 11:15:08,199 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2023-08-30 11:15:08,199 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 670 flow [2023-08-30 11:15:08,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 462.3636363636364) internal successors, (5086), 11 states have internal predecessors, (5086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:08,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:08,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:15:08,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 11:15:08,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:08,406 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:08,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1251818525, now seen corresponding path program 1 times [2023-08-30 11:15:08,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:08,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993664151] [2023-08-30 11:15:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:08,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:08,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:08,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993664151] [2023-08-30 11:15:08,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993664151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:08,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101131929] [2023-08-30 11:15:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:08,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:08,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:08,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:15:08,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 11:15:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 11:15:08,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:08,864 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 [2023-08-30 11:15:08,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:15:08,919 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 [2023-08-30 11:15:08,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:15:08,955 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 [2023-08-30 11:15:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:08,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:08,987 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_199 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_199) c_~A~0.base) (+ c_~A~0.offset (* c_~i~0 4))) 9223372039002259456))) is different from false [2023-08-30 11:15:09,008 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_199 (Array Int Int)) (v_ArrVal_198 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_198) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_199) |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 [2023-08-30 11:15:09,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:15:09,028 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 [2023-08-30 11:15:09,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:15:09,036 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 143 treesize of output 135 [2023-08-30 11:15:09,043 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 27 treesize of output 25 [2023-08-30 11:15:09,064 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 [2023-08-30 11:15:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 11:15:09,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101131929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:09,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:09,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 11:15:09,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530153165] [2023-08-30 11:15:09,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:09,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:15:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:09,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:15:09,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=105, Unknown=2, NotChecked=42, Total=182 [2023-08-30 11:15:09,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 458 out of 1270 [2023-08-30 11:15:09,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 670 flow. Second operand has 14 states, 14 states have (on average 459.2857142857143) internal successors, (6430), 14 states have internal predecessors, (6430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:09,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:09,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 458 of 1270 [2023-08-30 11:15:09,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:13,955 INFO L130 PetriNetUnfolder]: 13686/23833 cut-off events. [2023-08-30 11:15:13,955 INFO L131 PetriNetUnfolder]: For 25594/25594 co-relation queries the response was YES. [2023-08-30 11:15:14,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71175 conditions, 23833 events. 13686/23833 cut-off events. For 25594/25594 co-relation queries the response was YES. Maximal size of possible extension queue 2068. Compared 211470 event pairs, 4321 based on Foata normal form. 248/14450 useless extension candidates. Maximal degree in co-relation 71145. Up to 8441 conditions per place. [2023-08-30 11:15:14,094 INFO L137 encePairwiseOnDemand]: 1253/1270 looper letters, 220 selfloop transitions, 61 changer transitions 1/283 dead transitions. [2023-08-30 11:15:14,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 283 transitions, 2026 flow [2023-08-30 11:15:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:15:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:15:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4342 transitions. [2023-08-30 11:15:14,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37987751531058617 [2023-08-30 11:15:14,104 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4342 transitions. [2023-08-30 11:15:14,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4342 transitions. [2023-08-30 11:15:14,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:14,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4342 transitions. [2023-08-30 11:15:14,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 482.44444444444446) internal successors, (4342), 9 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:14,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1270.0) internal successors, (12700), 10 states have internal predecessors, (12700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:14,124 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1270.0) internal successors, (12700), 10 states have internal predecessors, (12700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:14,124 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 670 flow. Second operand 9 states and 4342 transitions. [2023-08-30 11:15:14,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 283 transitions, 2026 flow [2023-08-30 11:15:14,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 283 transitions, 1969 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-30 11:15:14,328 INFO L231 Difference]: Finished difference. Result has 94 places, 128 transitions, 1108 flow [2023-08-30 11:15:14,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1108, PETRI_PLACES=94, PETRI_TRANSITIONS=128} [2023-08-30 11:15:14,329 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-08-30 11:15:14,329 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 128 transitions, 1108 flow [2023-08-30 11:15:14,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 459.2857142857143) internal successors, (6430), 14 states have internal predecessors, (6430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:14,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:14,331 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 11:15:14,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 11:15:14,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:14,536 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:14,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1249213873, now seen corresponding path program 2 times [2023-08-30 11:15:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:14,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362522558] [2023-08-30 11:15:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:14,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:14,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362522558] [2023-08-30 11:15:14,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362522558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:14,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211546340] [2023-08-30 11:15:14,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:15:14,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:14,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:14,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:15:14,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 11:15:14,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:15:14,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:15:14,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:15:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:15:14,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:15:14,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211546340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:15:14,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:15:14,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 11:15:14,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684007263] [2023-08-30 11:15:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:15:14,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:15:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:14,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:15:14,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:15:14,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 1270 [2023-08-30 11:15:14,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 128 transitions, 1108 flow. Second operand has 3 states, 3 states have (on average 503.0) internal successors, (1509), 3 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:14,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:14,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 1270 [2023-08-30 11:15:14,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:19,075 INFO L130 PetriNetUnfolder]: 13686/24088 cut-off events. [2023-08-30 11:15:19,075 INFO L131 PetriNetUnfolder]: For 33412/33412 co-relation queries the response was YES. [2023-08-30 11:15:19,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79364 conditions, 24088 events. 13686/24088 cut-off events. For 33412/33412 co-relation queries the response was YES. Maximal size of possible extension queue 2308. Compared 218100 event pairs, 10566 based on Foata normal form. 1/14458 useless extension candidates. Maximal degree in co-relation 79331. Up to 23481 conditions per place. [2023-08-30 11:15:19,198 INFO L137 encePairwiseOnDemand]: 1268/1270 looper letters, 125 selfloop transitions, 1 changer transitions 0/127 dead transitions. [2023-08-30 11:15:19,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 127 transitions, 1350 flow [2023-08-30 11:15:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:15:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:15:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1549 transitions. [2023-08-30 11:15:19,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065616797900262 [2023-08-30 11:15:19,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1549 transitions. [2023-08-30 11:15:19,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1549 transitions. [2023-08-30 11:15:19,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:19,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1549 transitions. [2023-08-30 11:15:19,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 516.3333333333334) internal successors, (1549), 3 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:19,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:19,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:19,208 INFO L175 Difference]: Start difference. First operand has 94 places, 128 transitions, 1108 flow. Second operand 3 states and 1549 transitions. [2023-08-30 11:15:19,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 127 transitions, 1350 flow [2023-08-30 11:15:19,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 127 transitions, 1337 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-30 11:15:19,409 INFO L231 Difference]: Finished difference. Result has 89 places, 127 transitions, 1087 flow [2023-08-30 11:15:19,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1087, PETRI_PLACES=89, PETRI_TRANSITIONS=127} [2023-08-30 11:15:19,410 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2023-08-30 11:15:19,410 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 127 transitions, 1087 flow [2023-08-30 11:15:19,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.0) internal successors, (1509), 3 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:19,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:19,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:15:19,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 11:15:19,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 11:15:19,616 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err18ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:19,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1329937599, now seen corresponding path program 1 times [2023-08-30 11:15:19,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:19,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916068562] [2023-08-30 11:15:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:19,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:19,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:19,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916068562] [2023-08-30 11:15:19,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916068562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:15:19,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:15:19,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:15:19,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976891228] [2023-08-30 11:15:19,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:15:19,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:15:19,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:15:19,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:15:19,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 501 out of 1270 [2023-08-30 11:15:19,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 127 transitions, 1087 flow. Second operand has 3 states, 3 states have (on average 503.0) internal successors, (1509), 3 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:19,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:19,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 501 of 1270 [2023-08-30 11:15:19,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:23,299 INFO L130 PetriNetUnfolder]: 12804/22633 cut-off events. [2023-08-30 11:15:23,299 INFO L131 PetriNetUnfolder]: For 31558/31558 co-relation queries the response was YES. [2023-08-30 11:15:23,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74448 conditions, 22633 events. 12804/22633 cut-off events. For 31558/31558 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 204595 event pairs, 9842 based on Foata normal form. 0/13682 useless extension candidates. Maximal degree in co-relation 74419. Up to 21977 conditions per place. [2023-08-30 11:15:23,438 INFO L137 encePairwiseOnDemand]: 1268/1270 looper letters, 124 selfloop transitions, 1 changer transitions 0/126 dead transitions. [2023-08-30 11:15:23,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1335 flow [2023-08-30 11:15:23,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:15:23,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:15:23,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1545 transitions. [2023-08-30 11:15:23,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40551181102362205 [2023-08-30 11:15:23,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1545 transitions. [2023-08-30 11:15:23,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1545 transitions. [2023-08-30 11:15:23,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:23,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1545 transitions. [2023-08-30 11:15:23,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 515.0) internal successors, (1545), 3 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:23,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:23,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:23,449 INFO L175 Difference]: Start difference. First operand has 89 places, 127 transitions, 1087 flow. Second operand 3 states and 1545 transitions. [2023-08-30 11:15:23,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1335 flow [2023-08-30 11:15:23,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 126 transitions, 1334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:23,690 INFO L231 Difference]: Finished difference. Result has 89 places, 126 transitions, 1086 flow [2023-08-30 11:15:23,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1086, PETRI_PLACES=89, PETRI_TRANSITIONS=126} [2023-08-30 11:15:23,690 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2023-08-30 11:15:23,690 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 126 transitions, 1086 flow [2023-08-30 11:15:23,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.0) internal successors, (1509), 3 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:23,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:23,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:15:23,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 11:15:23,691 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err21ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:23,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1329937433, now seen corresponding path program 1 times [2023-08-30 11:15:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:23,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883313021] [2023-08-30 11:15:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:23,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:23,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883313021] [2023-08-30 11:15:23,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883313021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:15:23,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:15:23,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:15:23,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842787154] [2023-08-30 11:15:23,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:15:23,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:15:23,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:23,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:15:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:15:23,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1270 [2023-08-30 11:15:23,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 126 transitions, 1086 flow. Second operand has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:23,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:23,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1270 [2023-08-30 11:15:23,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:29,528 INFO L130 PetriNetUnfolder]: 21828/35257 cut-off events. [2023-08-30 11:15:29,529 INFO L131 PetriNetUnfolder]: For 59647/59647 co-relation queries the response was YES. [2023-08-30 11:15:29,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111517 conditions, 35257 events. 21828/35257 cut-off events. For 59647/59647 co-relation queries the response was YES. Maximal size of possible extension queue 2749. Compared 300895 event pairs, 7670 based on Foata normal form. 0/19116 useless extension candidates. Maximal degree in co-relation 111487. Up to 19953 conditions per place. [2023-08-30 11:15:29,718 INFO L137 encePairwiseOnDemand]: 1260/1270 looper letters, 181 selfloop transitions, 8 changer transitions 0/190 dead transitions. [2023-08-30 11:15:29,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 190 transitions, 2020 flow [2023-08-30 11:15:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:15:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:15:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-08-30 11:15:29,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4136482939632546 [2023-08-30 11:15:29,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-08-30 11:15:29,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-08-30 11:15:29,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:29,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-08-30 11:15:29,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:29,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:29,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:29,725 INFO L175 Difference]: Start difference. First operand has 89 places, 126 transitions, 1086 flow. Second operand 3 states and 1576 transitions. [2023-08-30 11:15:29,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 190 transitions, 2020 flow [2023-08-30 11:15:29,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 190 transitions, 2019 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:29,957 INFO L231 Difference]: Finished difference. Result has 92 places, 133 transitions, 1149 flow [2023-08-30 11:15:29,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1149, PETRI_PLACES=92, PETRI_TRANSITIONS=133} [2023-08-30 11:15:29,958 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-08-30 11:15:29,958 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 133 transitions, 1149 flow [2023-08-30 11:15:29,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:29,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:29,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:29,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 11:15:29,959 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err24ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:29,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:29,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1721604982, now seen corresponding path program 1 times [2023-08-30 11:15:29,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:29,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125061059] [2023-08-30 11:15:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:29,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:15:30,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:30,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125061059] [2023-08-30 11:15:30,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125061059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:15:30,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:15:30,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:15:30,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029414298] [2023-08-30 11:15:30,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:15:30,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:15:30,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:30,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:15:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:15:30,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1270 [2023-08-30 11:15:30,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 133 transitions, 1149 flow. Second operand has 3 states, 3 states have (on average 502.3333333333333) internal successors, (1507), 3 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:30,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:30,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1270 [2023-08-30 11:15:30,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:36,086 INFO L130 PetriNetUnfolder]: 18820/31281 cut-off events. [2023-08-30 11:15:36,086 INFO L131 PetriNetUnfolder]: For 44589/44589 co-relation queries the response was YES. [2023-08-30 11:15:36,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109970 conditions, 31281 events. 18820/31281 cut-off events. For 44589/44589 co-relation queries the response was YES. Maximal size of possible extension queue 2482. Compared 268735 event pairs, 12738 based on Foata normal form. 0/20232 useless extension candidates. Maximal degree in co-relation 109937. Up to 30481 conditions per place. [2023-08-30 11:15:36,526 INFO L137 encePairwiseOnDemand]: 1267/1270 looper letters, 127 selfloop transitions, 1 changer transitions 0/129 dead transitions. [2023-08-30 11:15:36,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 129 transitions, 1385 flow [2023-08-30 11:15:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:15:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:15:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1541 transitions. [2023-08-30 11:15:36,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044619422572178 [2023-08-30 11:15:36,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1541 transitions. [2023-08-30 11:15:36,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1541 transitions. [2023-08-30 11:15:36,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:36,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1541 transitions. [2023-08-30 11:15:36,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 513.6666666666666) internal successors, (1541), 3 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:36,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:36,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:36,534 INFO L175 Difference]: Start difference. First operand has 92 places, 133 transitions, 1149 flow. Second operand 3 states and 1541 transitions. [2023-08-30 11:15:36,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 129 transitions, 1385 flow [2023-08-30 11:15:36,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 129 transitions, 1373 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:15:36,987 INFO L231 Difference]: Finished difference. Result has 90 places, 129 transitions, 1119 flow [2023-08-30 11:15:36,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1119, PETRI_PLACES=90, PETRI_TRANSITIONS=129} [2023-08-30 11:15:36,988 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2023-08-30 11:15:36,988 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 129 transitions, 1119 flow [2023-08-30 11:15:36,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.3333333333333) internal successors, (1507), 3 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:36,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:36,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:36,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 11:15:36,989 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:36,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1721604971, now seen corresponding path program 1 times [2023-08-30 11:15:36,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:36,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459142678] [2023-08-30 11:15:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:36,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:37,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:37,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459142678] [2023-08-30 11:15:37,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459142678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:15:37,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:15:37,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:15:37,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345069921] [2023-08-30 11:15:37,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:15:37,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:15:37,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:37,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:15:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:15:37,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1270 [2023-08-30 11:15:37,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 129 transitions, 1119 flow. Second operand has 4 states, 4 states have (on average 495.75) internal successors, (1983), 4 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:37,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:37,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1270 [2023-08-30 11:15:37,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:43,105 INFO L130 PetriNetUnfolder]: 18706/30571 cut-off events. [2023-08-30 11:15:43,106 INFO L131 PetriNetUnfolder]: For 54658/54658 co-relation queries the response was YES. [2023-08-30 11:15:43,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105858 conditions, 30571 events. 18706/30571 cut-off events. For 54658/54658 co-relation queries the response was YES. Maximal size of possible extension queue 2411. Compared 260475 event pairs, 8346 based on Foata normal form. 0/18380 useless extension candidates. Maximal degree in co-relation 105825. Up to 20665 conditions per place. [2023-08-30 11:15:43,301 INFO L137 encePairwiseOnDemand]: 1256/1270 looper letters, 178 selfloop transitions, 8 changer transitions 1/188 dead transitions. [2023-08-30 11:15:43,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 188 transitions, 2043 flow [2023-08-30 11:15:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:15:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:15:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2549 transitions. [2023-08-30 11:15:43,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40141732283464565 [2023-08-30 11:15:43,305 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2549 transitions. [2023-08-30 11:15:43,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2549 transitions. [2023-08-30 11:15:43,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:43,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2549 transitions. [2023-08-30 11:15:43,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 509.8) internal successors, (2549), 5 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:43,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:43,312 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:43,312 INFO L175 Difference]: Start difference. First operand has 90 places, 129 transitions, 1119 flow. Second operand 5 states and 2549 transitions. [2023-08-30 11:15:43,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 188 transitions, 2043 flow [2023-08-30 11:15:43,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 188 transitions, 2042 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:43,559 INFO L231 Difference]: Finished difference. Result has 95 places, 131 transitions, 1166 flow [2023-08-30 11:15:43,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1166, PETRI_PLACES=95, PETRI_TRANSITIONS=131} [2023-08-30 11:15:43,560 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2023-08-30 11:15:43,560 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 131 transitions, 1166 flow [2023-08-30 11:15:43,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 495.75) internal successors, (1983), 4 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:43,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:43,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:15:43,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 11:15:43,561 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err25ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:43,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:43,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1329937563, now seen corresponding path program 1 times [2023-08-30 11:15:43,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:43,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347582467] [2023-08-30 11:15:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:43,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:43,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:43,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347582467] [2023-08-30 11:15:43,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347582467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:15:43,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:15:43,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:15:43,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550466774] [2023-08-30 11:15:43,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:15:43,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:15:43,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:15:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:15:43,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1270 [2023-08-30 11:15:43,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 131 transitions, 1166 flow. Second operand has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:43,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:43,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1270 [2023-08-30 11:15:43,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:48,779 INFO L130 PetriNetUnfolder]: 15190/24627 cut-off events. [2023-08-30 11:15:48,779 INFO L131 PetriNetUnfolder]: For 41715/41715 co-relation queries the response was YES. [2023-08-30 11:15:48,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97233 conditions, 24627 events. 15190/24627 cut-off events. For 41715/41715 co-relation queries the response was YES. Maximal size of possible extension queue 1873. Compared 197697 event pairs, 9770 based on Foata normal form. 6/17608 useless extension candidates. Maximal degree in co-relation 97197. Up to 24291 conditions per place. [2023-08-30 11:15:48,936 INFO L137 encePairwiseOnDemand]: 1267/1270 looper letters, 126 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2023-08-30 11:15:48,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 128 transitions, 1407 flow [2023-08-30 11:15:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:15:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:15:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1539 transitions. [2023-08-30 11:15:48,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40393700787401576 [2023-08-30 11:15:48,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1539 transitions. [2023-08-30 11:15:48,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1539 transitions. [2023-08-30 11:15:48,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:48,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1539 transitions. [2023-08-30 11:15:48,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 513.0) internal successors, (1539), 3 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:48,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:48,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:48,943 INFO L175 Difference]: Start difference. First operand has 95 places, 131 transitions, 1166 flow. Second operand 3 states and 1539 transitions. [2023-08-30 11:15:48,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 128 transitions, 1407 flow [2023-08-30 11:15:49,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1404 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:49,194 INFO L231 Difference]: Finished difference. Result has 94 places, 128 transitions, 1152 flow [2023-08-30 11:15:49,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1152, PETRI_PLACES=94, PETRI_TRANSITIONS=128} [2023-08-30 11:15:49,194 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-08-30 11:15:49,195 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 128 transitions, 1152 flow [2023-08-30 11:15:49,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:49,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:49,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:15:49,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 11:15:49,195 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:49,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash 151672191, now seen corresponding path program 1 times [2023-08-30 11:15:49,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:49,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431216577] [2023-08-30 11:15:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:49,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:15:49,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:49,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431216577] [2023-08-30 11:15:49,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431216577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:15:49,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:15:49,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:15:49,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451602584] [2023-08-30 11:15:49,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:15:49,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:15:49,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:15:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:15:49,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 478 out of 1270 [2023-08-30 11:15:49,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 128 transitions, 1152 flow. Second operand has 4 states, 4 states have (on average 479.75) internal successors, (1919), 4 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:49,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:49,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 478 of 1270 [2023-08-30 11:15:49,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:54,665 INFO L130 PetriNetUnfolder]: 15074/24976 cut-off events. [2023-08-30 11:15:54,665 INFO L131 PetriNetUnfolder]: For 38183/38183 co-relation queries the response was YES. [2023-08-30 11:15:54,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97119 conditions, 24976 events. 15074/24976 cut-off events. For 38183/38183 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 209812 event pairs, 2789 based on Foata normal form. 116/18067 useless extension candidates. Maximal degree in co-relation 97082. Up to 18881 conditions per place. [2023-08-30 11:15:54,789 INFO L137 encePairwiseOnDemand]: 1260/1270 looper letters, 167 selfloop transitions, 29 changer transitions 0/197 dead transitions. [2023-08-30 11:15:54,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 197 transitions, 1940 flow [2023-08-30 11:15:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:15:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:15:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2478 transitions. [2023-08-30 11:15:54,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39023622047244094 [2023-08-30 11:15:54,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2478 transitions. [2023-08-30 11:15:54,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2478 transitions. [2023-08-30 11:15:54,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:54,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2478 transitions. [2023-08-30 11:15:54,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 495.6) internal successors, (2478), 5 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:54,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:54,801 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:54,801 INFO L175 Difference]: Start difference. First operand has 94 places, 128 transitions, 1152 flow. Second operand 5 states and 2478 transitions. [2023-08-30 11:15:54,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 197 transitions, 1940 flow [2023-08-30 11:15:54,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 197 transitions, 1939 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:15:54,931 INFO L231 Difference]: Finished difference. Result has 99 places, 137 transitions, 1334 flow [2023-08-30 11:15:54,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1334, PETRI_PLACES=99, PETRI_TRANSITIONS=137} [2023-08-30 11:15:54,932 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2023-08-30 11:15:54,932 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 137 transitions, 1334 flow [2023-08-30 11:15:54,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 479.75) internal successors, (1919), 4 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:54,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:15:54,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:15:54,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 11:15:54,933 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:15:54,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:15:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1251818590, now seen corresponding path program 1 times [2023-08-30 11:15:54,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:15:54,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84607154] [2023-08-30 11:15:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:54,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:15:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:55,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:15:55,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84607154] [2023-08-30 11:15:55,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84607154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:15:55,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71919311] [2023-08-30 11:15:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:15:55,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:15:55,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:15:55,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:15:55,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 11:15:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:15:55,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 11:15:55,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:15:55,336 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 [2023-08-30 11:15:55,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:15:55,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 11:15:55,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:15:55,430 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 [2023-08-30 11:15:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:55,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:15:55,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:15:55,503 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 [2023-08-30 11:15:55,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:15:55,510 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 63 treesize of output 59 [2023-08-30 11:15:55,513 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 [2023-08-30 11:15:55,517 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 [2023-08-30 11:15:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:15:55,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71919311] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:15:55,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:15:55,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 11:15:55,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505099733] [2023-08-30 11:15:55,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:15:55,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 11:15:55,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:15:55,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 11:15:55,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=116, Unknown=3, NotChecked=0, Total=156 [2023-08-30 11:15:55,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 467 out of 1270 [2023-08-30 11:15:55,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 137 transitions, 1334 flow. Second operand has 13 states, 13 states have (on average 468.3076923076923) internal successors, (6088), 13 states have internal predecessors, (6088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:55,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:15:55,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 467 of 1270 [2023-08-30 11:15:55,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:00,817 INFO L130 PetriNetUnfolder]: 14666/23863 cut-off events. [2023-08-30 11:16:00,817 INFO L131 PetriNetUnfolder]: For 52847/52847 co-relation queries the response was YES. [2023-08-30 11:16:00,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96450 conditions, 23863 events. 14666/23863 cut-off events. For 52847/52847 co-relation queries the response was YES. Maximal size of possible extension queue 1867. Compared 190859 event pairs, 3217 based on Foata normal form. 116/17384 useless extension candidates. Maximal degree in co-relation 96410. Up to 12107 conditions per place. [2023-08-30 11:16:00,973 INFO L137 encePairwiseOnDemand]: 1254/1270 looper letters, 113 selfloop transitions, 68 changer transitions 0/182 dead transitions. [2023-08-30 11:16:00,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 182 transitions, 1886 flow [2023-08-30 11:16:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:16:00,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:16:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2889 transitions. [2023-08-30 11:16:00,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37913385826771656 [2023-08-30 11:16:00,979 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2889 transitions. [2023-08-30 11:16:00,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2889 transitions. [2023-08-30 11:16:00,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:00,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2889 transitions. [2023-08-30 11:16:00,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 481.5) internal successors, (2889), 6 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:00,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1270.0) internal successors, (8890), 7 states have internal predecessors, (8890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:00,988 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1270.0) internal successors, (8890), 7 states have internal predecessors, (8890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:00,988 INFO L175 Difference]: Start difference. First operand has 99 places, 137 transitions, 1334 flow. Second operand 6 states and 2889 transitions. [2023-08-30 11:16:00,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 182 transitions, 1886 flow [2023-08-30 11:16:01,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 182 transitions, 1878 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 11:16:01,254 INFO L231 Difference]: Finished difference. Result has 104 places, 135 transitions, 1434 flow [2023-08-30 11:16:01,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1434, PETRI_PLACES=104, PETRI_TRANSITIONS=135} [2023-08-30 11:16:01,254 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2023-08-30 11:16:01,255 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 135 transitions, 1434 flow [2023-08-30 11:16:01,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 468.3076923076923) internal successors, (6088), 13 states have internal predecessors, (6088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:01,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:01,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:16:01,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:01,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:01,457 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:01,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:01,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1329937560, now seen corresponding path program 1 times [2023-08-30 11:16:01,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:01,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451585024] [2023-08-30 11:16:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:01,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:01,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:01,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451585024] [2023-08-30 11:16:01,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451585024] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:01,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:01,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:16:01,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610762175] [2023-08-30 11:16:01,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:01,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:01,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:16:01,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1270 [2023-08-30 11:16:01,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 135 transitions, 1434 flow. Second operand has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:01,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:01,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1270 [2023-08-30 11:16:01,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:06,066 INFO L130 PetriNetUnfolder]: 12860/21899 cut-off events. [2023-08-30 11:16:06,066 INFO L131 PetriNetUnfolder]: For 78632/78632 co-relation queries the response was YES. [2023-08-30 11:16:06,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91588 conditions, 21899 events. 12860/21899 cut-off events. For 78632/78632 co-relation queries the response was YES. Maximal size of possible extension queue 1859. Compared 189795 event pairs, 3820 based on Foata normal form. 606/17110 useless extension candidates. Maximal degree in co-relation 91546. Up to 12753 conditions per place. [2023-08-30 11:16:06,258 INFO L137 encePairwiseOnDemand]: 1262/1270 looper letters, 177 selfloop transitions, 5 changer transitions 3/186 dead transitions. [2023-08-30 11:16:06,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 186 transitions, 2422 flow [2023-08-30 11:16:06,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1566 transitions. [2023-08-30 11:16:06,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110236220472441 [2023-08-30 11:16:06,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1566 transitions. [2023-08-30 11:16:06,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1566 transitions. [2023-08-30 11:16:06,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:06,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1566 transitions. [2023-08-30 11:16:06,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 522.0) internal successors, (1566), 3 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:06,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:06,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:06,264 INFO L175 Difference]: Start difference. First operand has 104 places, 135 transitions, 1434 flow. Second operand 3 states and 1566 transitions. [2023-08-30 11:16:06,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 186 transitions, 2422 flow [2023-08-30 11:16:06,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 186 transitions, 2361 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-30 11:16:06,403 INFO L231 Difference]: Finished difference. Result has 100 places, 128 transitions, 1364 flow [2023-08-30 11:16:06,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1364, PETRI_PLACES=100, PETRI_TRANSITIONS=128} [2023-08-30 11:16:06,404 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 26 predicate places. [2023-08-30 11:16:06,404 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 128 transitions, 1364 flow [2023-08-30 11:16:06,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:06,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:06,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:06,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 11:16:06,405 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err18ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:06,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:06,405 INFO L85 PathProgramCache]: Analyzing trace with hash 151858965, now seen corresponding path program 1 times [2023-08-30 11:16:06,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:06,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923996408] [2023-08-30 11:16:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:06,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:06,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:06,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923996408] [2023-08-30 11:16:06,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923996408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:06,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:16:06,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:16:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981570751] [2023-08-30 11:16:06,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:06,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:16:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:06,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:16:06,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:16:06,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1270 [2023-08-30 11:16:06,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 128 transitions, 1364 flow. Second operand has 4 states, 4 states have (on average 498.75) internal successors, (1995), 4 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:06,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:06,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1270 [2023-08-30 11:16:06,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:10,998 INFO L130 PetriNetUnfolder]: 12857/21709 cut-off events. [2023-08-30 11:16:10,998 INFO L131 PetriNetUnfolder]: For 74388/74388 co-relation queries the response was YES. [2023-08-30 11:16:11,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89732 conditions, 21709 events. 12857/21709 cut-off events. For 74388/74388 co-relation queries the response was YES. Maximal size of possible extension queue 1817. Compared 184369 event pairs, 7038 based on Foata normal form. 0/17514 useless extension candidates. Maximal degree in co-relation 89693. Up to 15719 conditions per place. [2023-08-30 11:16:11,180 INFO L137 encePairwiseOnDemand]: 1265/1270 looper letters, 112 selfloop transitions, 34 changer transitions 0/146 dead transitions. [2023-08-30 11:16:11,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 146 transitions, 1784 flow [2023-08-30 11:16:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:16:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:16:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2039 transitions. [2023-08-30 11:16:11,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013779527559055 [2023-08-30 11:16:11,183 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2039 transitions. [2023-08-30 11:16:11,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2039 transitions. [2023-08-30 11:16:11,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:11,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2039 transitions. [2023-08-30 11:16:11,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 509.75) internal successors, (2039), 4 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:11,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1270.0) internal successors, (6350), 5 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:11,187 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1270.0) internal successors, (6350), 5 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:11,187 INFO L175 Difference]: Start difference. First operand has 100 places, 128 transitions, 1364 flow. Second operand 4 states and 2039 transitions. [2023-08-30 11:16:11,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 146 transitions, 1784 flow [2023-08-30 11:16:11,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 146 transitions, 1712 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-08-30 11:16:11,454 INFO L231 Difference]: Finished difference. Result has 94 places, 127 transitions, 1369 flow [2023-08-30 11:16:11,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1369, PETRI_PLACES=94, PETRI_TRANSITIONS=127} [2023-08-30 11:16:11,455 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-08-30 11:16:11,455 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 127 transitions, 1369 flow [2023-08-30 11:16:11,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 498.75) internal successors, (1995), 4 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:11,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:11,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:11,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 11:16:11,456 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err19ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:11,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash 151859390, now seen corresponding path program 1 times [2023-08-30 11:16:11,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:11,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686707891] [2023-08-30 11:16:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:11,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:11,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:11,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686707891] [2023-08-30 11:16:11,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686707891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524085965] [2023-08-30 11:16:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:11,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:11,537 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:11,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 11:16:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:11,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:16:11,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:11,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 97 [2023-08-30 11:16:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:11,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:16:11,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524085965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:16:11,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:16:11,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2023-08-30 11:16:11,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236930557] [2023-08-30 11:16:11,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:11,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:16:11,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:11,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:16:11,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-30 11:16:11,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 492 out of 1270 [2023-08-30 11:16:11,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 127 transitions, 1369 flow. Second operand has 5 states, 5 states have (on average 493.4) internal successors, (2467), 5 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:11,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:11,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 492 of 1270 [2023-08-30 11:16:11,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:14,593 INFO L130 PetriNetUnfolder]: 9955/17217 cut-off events. [2023-08-30 11:16:14,593 INFO L131 PetriNetUnfolder]: For 58028/58028 co-relation queries the response was YES. [2023-08-30 11:16:14,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72588 conditions, 17217 events. 9955/17217 cut-off events. For 58028/58028 co-relation queries the response was YES. Maximal size of possible extension queue 1540. Compared 148018 event pairs, 4626 based on Foata normal form. 990/13703 useless extension candidates. Maximal degree in co-relation 72553. Up to 10913 conditions per place. [2023-08-30 11:16:14,861 INFO L137 encePairwiseOnDemand]: 1256/1270 looper letters, 89 selfloop transitions, 67 changer transitions 0/156 dead transitions. [2023-08-30 11:16:14,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 156 transitions, 1835 flow [2023-08-30 11:16:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:16:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:16:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2528 transitions. [2023-08-30 11:16:14,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981102362204724 [2023-08-30 11:16:14,865 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2528 transitions. [2023-08-30 11:16:14,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2528 transitions. [2023-08-30 11:16:14,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:14,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2528 transitions. [2023-08-30 11:16:14,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 505.6) internal successors, (2528), 5 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:14,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:14,870 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:14,870 INFO L175 Difference]: Start difference. First operand has 94 places, 127 transitions, 1369 flow. Second operand 5 states and 2528 transitions. [2023-08-30 11:16:14,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 156 transitions, 1835 flow [2023-08-30 11:16:14,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 156 transitions, 1767 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:16:14,934 INFO L231 Difference]: Finished difference. Result has 93 places, 124 transitions, 1423 flow [2023-08-30 11:16:14,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1423, PETRI_PLACES=93, PETRI_TRANSITIONS=124} [2023-08-30 11:16:14,935 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2023-08-30 11:16:14,935 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 124 transitions, 1423 flow [2023-08-30 11:16:14,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 493.4) internal successors, (2467), 5 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:14,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:14,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:14,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 11:16:15,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:15,137 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:15,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:15,137 INFO L85 PathProgramCache]: Analyzing trace with hash 151651882, now seen corresponding path program 1 times [2023-08-30 11:16:15,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:15,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863910057] [2023-08-30 11:16:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:15,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:15,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:15,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863910057] [2023-08-30 11:16:15,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863910057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:15,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073980838] [2023-08-30 11:16:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:15,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:15,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:15,350 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:15,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 11:16:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:15,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 11:16:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:15,545 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 [2023-08-30 11:16:15,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:16:15,601 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 [2023-08-30 11:16:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:16:15,631 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 [2023-08-30 11:16:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:15,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:15,666 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_437 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_437) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))) 9223372039002259456))) is different from false [2023-08-30 11:16:15,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:16:15,715 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 [2023-08-30 11:16:15,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:16:15,722 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 73 treesize of output 69 [2023-08-30 11:16:15,726 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 [2023-08-30 11:16:15,730 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 [2023-08-30 11:16:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:15,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073980838] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:15,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:15,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 11:16:15,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283742852] [2023-08-30 11:16:15,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:15,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 11:16:15,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:15,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 11:16:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=5, NotChecked=20, Total=156 [2023-08-30 11:16:15,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 467 out of 1270 [2023-08-30 11:16:15,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 124 transitions, 1423 flow. Second operand has 13 states, 13 states have (on average 468.46153846153845) internal successors, (6090), 13 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:15,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:15,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 467 of 1270 [2023-08-30 11:16:15,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:18,547 INFO L130 PetriNetUnfolder]: 9219/15953 cut-off events. [2023-08-30 11:16:18,547 INFO L131 PetriNetUnfolder]: For 75910/75910 co-relation queries the response was YES. [2023-08-30 11:16:18,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69338 conditions, 15953 events. 9219/15953 cut-off events. For 75910/75910 co-relation queries the response was YES. Maximal size of possible extension queue 1434. Compared 137017 event pairs, 1493 based on Foata normal form. 0/11997 useless extension candidates. Maximal degree in co-relation 69303. Up to 6853 conditions per place. [2023-08-30 11:16:18,647 INFO L137 encePairwiseOnDemand]: 1261/1270 looper letters, 219 selfloop transitions, 9 changer transitions 0/228 dead transitions. [2023-08-30 11:16:18,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 228 transitions, 3184 flow [2023-08-30 11:16:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:16:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:16:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2882 transitions. [2023-08-30 11:16:18,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37821522309711286 [2023-08-30 11:16:18,651 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2882 transitions. [2023-08-30 11:16:18,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2882 transitions. [2023-08-30 11:16:18,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:18,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2882 transitions. [2023-08-30 11:16:18,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 480.3333333333333) internal successors, (2882), 6 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:18,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1270.0) internal successors, (8890), 7 states have internal predecessors, (8890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:18,659 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1270.0) internal successors, (8890), 7 states have internal predecessors, (8890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:18,659 INFO L175 Difference]: Start difference. First operand has 93 places, 124 transitions, 1423 flow. Second operand 6 states and 2882 transitions. [2023-08-30 11:16:18,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 228 transitions, 3184 flow [2023-08-30 11:16:18,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 228 transitions, 3015 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:16:18,749 INFO L231 Difference]: Finished difference. Result has 97 places, 125 transitions, 1375 flow [2023-08-30 11:16:18,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1375, PETRI_PLACES=97, PETRI_TRANSITIONS=125} [2023-08-30 11:16:18,749 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2023-08-30 11:16:18,750 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 125 transitions, 1375 flow [2023-08-30 11:16:18,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 468.46153846153845) internal successors, (6090), 13 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:18,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:18,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:18,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:18,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 11:16:18,951 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:18,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash 151651992, now seen corresponding path program 1 times [2023-08-30 11:16:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:18,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760317218] [2023-08-30 11:16:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:18,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:19,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760317218] [2023-08-30 11:16:19,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760317218] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359707555] [2023-08-30 11:16:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:19,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:19,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:19,225 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:19,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 11:16:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:19,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 11:16:19,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:19,414 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 [2023-08-30 11:16:19,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:16:19,463 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 [2023-08-30 11:16:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:16:19,493 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 [2023-08-30 11:16:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:19,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:19,528 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_471 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_471) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))) 4294967296)) is different from false [2023-08-30 11:16:19,545 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_470 (Array Int Int)) (v_ArrVal_471 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_470) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_471) |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 [2023-08-30 11:16:19,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:16:19,553 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 [2023-08-30 11:16:19,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:16:19,559 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 125 treesize of output 117 [2023-08-30 11:16:19,565 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 23 treesize of output 21 [2023-08-30 11:16:19,584 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 20 treesize of output 16 [2023-08-30 11:16:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 11:16:19,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359707555] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:19,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:19,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 11:16:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784049290] [2023-08-30 11:16:19,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:19,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:16:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:16:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=104, Unknown=2, NotChecked=42, Total=182 [2023-08-30 11:16:19,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 458 out of 1270 [2023-08-30 11:16:19,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 125 transitions, 1375 flow. Second operand has 14 states, 14 states have (on average 459.5) internal successors, (6433), 14 states have internal predecessors, (6433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:19,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:19,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 458 of 1270 [2023-08-30 11:16:19,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:22,568 INFO L130 PetriNetUnfolder]: 8483/14689 cut-off events. [2023-08-30 11:16:22,569 INFO L131 PetriNetUnfolder]: For 62206/62206 co-relation queries the response was YES. [2023-08-30 11:16:22,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67724 conditions, 14689 events. 8483/14689 cut-off events. For 62206/62206 co-relation queries the response was YES. Maximal size of possible extension queue 1309. Compared 124879 event pairs, 900 based on Foata normal form. 528/13686 useless extension candidates. Maximal degree in co-relation 67686. Up to 4294 conditions per place. [2023-08-30 11:16:22,684 INFO L137 encePairwiseOnDemand]: 1261/1270 looper letters, 325 selfloop transitions, 15 changer transitions 0/340 dead transitions. [2023-08-30 11:16:22,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 340 transitions, 4389 flow [2023-08-30 11:16:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:16:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:16:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4278 transitions. [2023-08-30 11:16:22,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742782152230971 [2023-08-30 11:16:22,688 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4278 transitions. [2023-08-30 11:16:22,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4278 transitions. [2023-08-30 11:16:22,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:22,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4278 transitions. [2023-08-30 11:16:22,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 475.3333333333333) internal successors, (4278), 9 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:22,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1270.0) internal successors, (12700), 10 states have internal predecessors, (12700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:22,701 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1270.0) internal successors, (12700), 10 states have internal predecessors, (12700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:22,701 INFO L175 Difference]: Start difference. First operand has 97 places, 125 transitions, 1375 flow. Second operand 9 states and 4278 transitions. [2023-08-30 11:16:22,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 340 transitions, 4389 flow [2023-08-30 11:16:22,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 340 transitions, 4357 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 11:16:22,791 INFO L231 Difference]: Finished difference. Result has 100 places, 129 transitions, 1409 flow [2023-08-30 11:16:22,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1409, PETRI_PLACES=100, PETRI_TRANSITIONS=129} [2023-08-30 11:16:22,792 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 26 predicate places. [2023-08-30 11:16:22,792 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 129 transitions, 1409 flow [2023-08-30 11:16:22,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 459.5) internal successors, (6433), 14 states have internal predecessors, (6433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:22,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:22,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:22,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:22,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 11:16:22,994 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:22,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash 412684266, now seen corresponding path program 1 times [2023-08-30 11:16:22,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:22,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973307780] [2023-08-30 11:16:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:22,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:23,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:23,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973307780] [2023-08-30 11:16:23,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973307780] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:23,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620077193] [2023-08-30 11:16:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:23,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:23,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:23,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:23,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 11:16:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:23,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:16:23,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:23,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:23,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620077193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:23,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:23,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 11:16:23,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491721031] [2023-08-30 11:16:23,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:23,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:16:23,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:16:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:16:23,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1270 [2023-08-30 11:16:23,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 129 transitions, 1409 flow. Second operand has 14 states, 14 states have (on average 488.35714285714283) internal successors, (6837), 14 states have internal predecessors, (6837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:23,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:23,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1270 [2023-08-30 11:16:23,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:25,664 INFO L130 PetriNetUnfolder]: 5925/10253 cut-off events. [2023-08-30 11:16:25,664 INFO L131 PetriNetUnfolder]: For 39395/39395 co-relation queries the response was YES. [2023-08-30 11:16:25,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45475 conditions, 10253 events. 5925/10253 cut-off events. For 39395/39395 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 80391 event pairs, 3365 based on Foata normal form. 216/9448 useless extension candidates. Maximal degree in co-relation 45440. Up to 7925 conditions per place. [2023-08-30 11:16:25,729 INFO L137 encePairwiseOnDemand]: 1254/1270 looper letters, 151 selfloop transitions, 17 changer transitions 1/169 dead transitions. [2023-08-30 11:16:25,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 169 transitions, 1723 flow [2023-08-30 11:16:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:16:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:16:25,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4502 transitions. [2023-08-30 11:16:25,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39387576552930886 [2023-08-30 11:16:25,733 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4502 transitions. [2023-08-30 11:16:25,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4502 transitions. [2023-08-30 11:16:25,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:25,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4502 transitions. [2023-08-30 11:16:25,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 500.22222222222223) internal successors, (4502), 9 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:25,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1270.0) internal successors, (12700), 10 states have internal predecessors, (12700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:25,745 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1270.0) internal successors, (12700), 10 states have internal predecessors, (12700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:25,746 INFO L175 Difference]: Start difference. First operand has 100 places, 129 transitions, 1409 flow. Second operand 9 states and 4502 transitions. [2023-08-30 11:16:25,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 169 transitions, 1723 flow [2023-08-30 11:16:25,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 169 transitions, 1680 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-30 11:16:25,826 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 1043 flow [2023-08-30 11:16:25,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1043, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2023-08-30 11:16:25,827 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2023-08-30 11:16:25,827 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 1043 flow [2023-08-30 11:16:25,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 488.35714285714283) internal successors, (6837), 14 states have internal predecessors, (6837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:25,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:25,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:25,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:26,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 11:16:26,035 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:26,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash 414894635, now seen corresponding path program 1 times [2023-08-30 11:16:26,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:26,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503777130] [2023-08-30 11:16:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:26,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:26,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:26,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503777130] [2023-08-30 11:16:26,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503777130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:26,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999450010] [2023-08-30 11:16:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:26,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:26,234 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:26,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 11:16:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:26,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:16:26,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:27,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-08-30 11:16:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:27,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:28,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 414 treesize of output 374 [2023-08-30 11:16:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:28,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999450010] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:28,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:16:28,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2023-08-30 11:16:28,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048594865] [2023-08-30 11:16:28,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:28,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:16:28,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:16:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:16:28,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 492 out of 1270 [2023-08-30 11:16:28,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 1043 flow. Second operand has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:28,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:28,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 492 of 1270 [2023-08-30 11:16:28,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:30,484 INFO L130 PetriNetUnfolder]: 7341/12329 cut-off events. [2023-08-30 11:16:30,484 INFO L131 PetriNetUnfolder]: For 39911/39911 co-relation queries the response was YES. [2023-08-30 11:16:30,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56336 conditions, 12329 events. 7341/12329 cut-off events. For 39911/39911 co-relation queries the response was YES. Maximal size of possible extension queue 1276. Compared 95710 event pairs, 2396 based on Foata normal form. 168/11222 useless extension candidates. Maximal degree in co-relation 56299. Up to 6402 conditions per place. [2023-08-30 11:16:30,565 INFO L137 encePairwiseOnDemand]: 1254/1270 looper letters, 107 selfloop transitions, 62 changer transitions 0/169 dead transitions. [2023-08-30 11:16:30,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 169 transitions, 1847 flow [2023-08-30 11:16:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:16:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:16:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2547 transitions. [2023-08-30 11:16:30,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011023622047244 [2023-08-30 11:16:30,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2547 transitions. [2023-08-30 11:16:30,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2547 transitions. [2023-08-30 11:16:30,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:30,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2547 transitions. [2023-08-30 11:16:30,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 509.4) internal successors, (2547), 5 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:30,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:30,574 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:30,574 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 1043 flow. Second operand 5 states and 2547 transitions. [2023-08-30 11:16:30,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 169 transitions, 1847 flow [2023-08-30 11:16:30,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 169 transitions, 1834 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 11:16:30,829 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 1453 flow [2023-08-30 11:16:30,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1453, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2023-08-30 11:16:30,830 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 35 predicate places. [2023-08-30 11:16:30,830 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 1453 flow [2023-08-30 11:16:30,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:30,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:30,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:30,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:31,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 11:16:31,031 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:31,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:31,032 INFO L85 PathProgramCache]: Analyzing trace with hash 414894513, now seen corresponding path program 1 times [2023-08-30 11:16:31,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:31,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664067325] [2023-08-30 11:16:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:31,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:31,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:31,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664067325] [2023-08-30 11:16:31,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664067325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:31,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287315335] [2023-08-30 11:16:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:31,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:31,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:31,226 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:31,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 11:16:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:31,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 11:16:31,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:32,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-08-30 11:16:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:32,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:33,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 416 treesize of output 376 [2023-08-30 11:16:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:33,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287315335] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:33,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:16:33,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2023-08-30 11:16:33,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45377006] [2023-08-30 11:16:33,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:33,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:16:33,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:33,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:16:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:16:33,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 492 out of 1270 [2023-08-30 11:16:33,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 1453 flow. Second operand has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:33,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:33,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 492 of 1270 [2023-08-30 11:16:33,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:35,543 INFO L130 PetriNetUnfolder]: 7311/12433 cut-off events. [2023-08-30 11:16:35,543 INFO L131 PetriNetUnfolder]: For 61525/61525 co-relation queries the response was YES. [2023-08-30 11:16:35,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62592 conditions, 12433 events. 7311/12433 cut-off events. For 61525/61525 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 98062 event pairs, 2013 based on Foata normal form. 96/11299 useless extension candidates. Maximal degree in co-relation 62551. Up to 5578 conditions per place. [2023-08-30 11:16:35,639 INFO L137 encePairwiseOnDemand]: 1253/1270 looper letters, 112 selfloop transitions, 55 changer transitions 0/167 dead transitions. [2023-08-30 11:16:35,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 167 transitions, 2075 flow [2023-08-30 11:16:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:16:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:16:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2548 transitions. [2023-08-30 11:16:35,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40125984251968505 [2023-08-30 11:16:35,642 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2548 transitions. [2023-08-30 11:16:35,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2548 transitions. [2023-08-30 11:16:35,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:35,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2548 transitions. [2023-08-30 11:16:35,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 509.6) internal successors, (2548), 5 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:35,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:35,648 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:35,648 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 1453 flow. Second operand 5 states and 2548 transitions. [2023-08-30 11:16:35,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 167 transitions, 2075 flow [2023-08-30 11:16:35,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 167 transitions, 2065 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-30 11:16:35,954 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 1554 flow [2023-08-30 11:16:35,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1554, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2023-08-30 11:16:35,954 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2023-08-30 11:16:35,955 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 1554 flow [2023-08-30 11:16:35,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:35,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:35,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:35,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:36,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 11:16:36,156 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:36,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:36,156 INFO L85 PathProgramCache]: Analyzing trace with hash 406247861, now seen corresponding path program 1 times [2023-08-30 11:16:36,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:36,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500512962] [2023-08-30 11:16:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:36,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:36,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:36,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500512962] [2023-08-30 11:16:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500512962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203866617] [2023-08-30 11:16:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:36,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:36,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:36,293 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:36,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 11:16:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:36,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 11:16:36,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:37,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 97 [2023-08-30 11:16:37,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 125 [2023-08-30 11:16:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:37,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:38,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 646 treesize of output 598 [2023-08-30 11:16:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:39,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203866617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:39,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:39,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 11:16:39,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508103639] [2023-08-30 11:16:39,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:39,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 11:16:39,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:39,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 11:16:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-30 11:16:39,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 484 out of 1270 [2023-08-30 11:16:39,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 1554 flow. Second operand has 13 states, 13 states have (on average 485.7692307692308) internal successors, (6315), 13 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:39,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:39,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 484 of 1270 [2023-08-30 11:16:39,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:41,530 INFO L130 PetriNetUnfolder]: 6979/11891 cut-off events. [2023-08-30 11:16:41,530 INFO L131 PetriNetUnfolder]: For 90694/90694 co-relation queries the response was YES. [2023-08-30 11:16:41,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62609 conditions, 11891 events. 6979/11891 cut-off events. For 90694/90694 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 94825 event pairs, 2997 based on Foata normal form. 168/10913 useless extension candidates. Maximal degree in co-relation 62566. Up to 7376 conditions per place. [2023-08-30 11:16:41,610 INFO L137 encePairwiseOnDemand]: 1258/1270 looper letters, 187 selfloop transitions, 9 changer transitions 12/208 dead transitions. [2023-08-30 11:16:41,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 208 transitions, 3166 flow [2023-08-30 11:16:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:16:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:16:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3977 transitions. [2023-08-30 11:16:41,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39143700787401575 [2023-08-30 11:16:41,613 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3977 transitions. [2023-08-30 11:16:41,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3977 transitions. [2023-08-30 11:16:41,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:41,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3977 transitions. [2023-08-30 11:16:41,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 497.125) internal successors, (3977), 8 states have internal predecessors, (3977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:41,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1270.0) internal successors, (11430), 9 states have internal predecessors, (11430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:41,620 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1270.0) internal successors, (11430), 9 states have internal predecessors, (11430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:41,620 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 1554 flow. Second operand 8 states and 3977 transitions. [2023-08-30 11:16:41,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 208 transitions, 3166 flow [2023-08-30 11:16:41,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 208 transitions, 3162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:16:41,749 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 1573 flow [2023-08-30 11:16:41,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=111, 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=1573, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2023-08-30 11:16:41,750 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 46 predicate places. [2023-08-30 11:16:41,750 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 1573 flow [2023-08-30 11:16:41,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 485.7692307692308) internal successors, (6315), 13 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:41,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:41,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:41,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:41,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 11:16:41,957 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:41,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:41,957 INFO L85 PathProgramCache]: Analyzing trace with hash 406247856, now seen corresponding path program 1 times [2023-08-30 11:16:41,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:41,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675286703] [2023-08-30 11:16:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:41,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:42,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:42,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675286703] [2023-08-30 11:16:42,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675286703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:42,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999733227] [2023-08-30 11:16:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:42,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:42,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:42,205 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:42,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 11:16:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:42,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:16:42,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:43,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 572 treesize of output 524 [2023-08-30 11:16:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:43,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:45,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 646 treesize of output 598 [2023-08-30 11:16:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:45,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999733227] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:45,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:16:45,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2023-08-30 11:16:45,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916080787] [2023-08-30 11:16:45,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:45,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:45,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:45,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:45,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:16:45,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1270 [2023-08-30 11:16:45,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 1573 flow. Second operand has 3 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:45,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:45,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1270 [2023-08-30 11:16:45,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:47,197 INFO L130 PetriNetUnfolder]: 5763/9841 cut-off events. [2023-08-30 11:16:47,197 INFO L131 PetriNetUnfolder]: For 74027/74027 co-relation queries the response was YES. [2023-08-30 11:16:47,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55489 conditions, 9841 events. 5763/9841 cut-off events. For 74027/74027 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 74715 event pairs, 4103 based on Foata normal form. 438/9985 useless extension candidates. Maximal degree in co-relation 55442. Up to 9841 conditions per place. [2023-08-30 11:16:47,261 INFO L137 encePairwiseOnDemand]: 1267/1270 looper letters, 113 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-08-30 11:16:47,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 114 transitions, 1781 flow [2023-08-30 11:16:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1535 transitions. [2023-08-30 11:16:47,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40288713910761154 [2023-08-30 11:16:47,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1535 transitions. [2023-08-30 11:16:47,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1535 transitions. [2023-08-30 11:16:47,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:47,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1535 transitions. [2023-08-30 11:16:47,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 511.6666666666667) internal successors, (1535), 3 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:47,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:47,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:47,267 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 1573 flow. Second operand 3 states and 1535 transitions. [2023-08-30 11:16:47,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 114 transitions, 1781 flow [2023-08-30 11:16:47,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 114 transitions, 1774 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:16:47,484 INFO L231 Difference]: Finished difference. Result has 117 places, 114 transitions, 1548 flow [2023-08-30 11:16:47,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1548, PETRI_PLACES=117, PETRI_TRANSITIONS=114} [2023-08-30 11:16:47,484 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 43 predicate places. [2023-08-30 11:16:47,484 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 114 transitions, 1548 flow [2023-08-30 11:16:47,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:47,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:47,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:47,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:47,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:47,689 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err21ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:47,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash 406247729, now seen corresponding path program 1 times [2023-08-30 11:16:47,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:47,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91315215] [2023-08-30 11:16:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:47,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:47,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:47,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91315215] [2023-08-30 11:16:47,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91315215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:47,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813280207] [2023-08-30 11:16:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:47,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:47,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:47,930 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:47,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 11:16:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 11:16:48,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:48,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 572 treesize of output 524 [2023-08-30 11:16:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:49,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:50,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 646 treesize of output 598 [2023-08-30 11:16:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:16:50,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813280207] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:50,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:16:50,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2023-08-30 11:16:50,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009944849] [2023-08-30 11:16:50,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:16:50,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:16:50,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:50,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:16:50,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:16:50,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 1270 [2023-08-30 11:16:50,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 1548 flow. Second operand has 3 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:50,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:50,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 1270 [2023-08-30 11:16:50,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:52,252 INFO L130 PetriNetUnfolder]: 5126/8766 cut-off events. [2023-08-30 11:16:52,252 INFO L131 PetriNetUnfolder]: For 64903/64903 co-relation queries the response was YES. [2023-08-30 11:16:52,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48980 conditions, 8766 events. 5126/8766 cut-off events. For 64903/64903 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 65511 event pairs, 3600 based on Foata normal form. 438/8940 useless extension candidates. Maximal degree in co-relation 48932. Up to 8766 conditions per place. [2023-08-30 11:16:52,315 INFO L137 encePairwiseOnDemand]: 1268/1270 looper letters, 96 selfloop transitions, 1 changer transitions 15/112 dead transitions. [2023-08-30 11:16:52,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 112 transitions, 1755 flow [2023-08-30 11:16:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:16:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:16:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1533 transitions. [2023-08-30 11:16:52,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023622047244094 [2023-08-30 11:16:52,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1533 transitions. [2023-08-30 11:16:52,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1533 transitions. [2023-08-30 11:16:52,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:52,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1533 transitions. [2023-08-30 11:16:52,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 511.0) internal successors, (1533), 3 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:52,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:52,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:52,320 INFO L175 Difference]: Start difference. First operand has 117 places, 114 transitions, 1548 flow. Second operand 3 states and 1533 transitions. [2023-08-30 11:16:52,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 112 transitions, 1755 flow [2023-08-30 11:16:52,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 112 transitions, 1751 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:16:52,514 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 1303 flow [2023-08-30 11:16:52,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1303, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2023-08-30 11:16:52,515 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 42 predicate places. [2023-08-30 11:16:52,515 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 1303 flow [2023-08-30 11:16:52,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:52,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:52,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:52,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:52,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:52,718 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:52,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:52,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1951612900, now seen corresponding path program 1 times [2023-08-30 11:16:52,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:52,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822344191] [2023-08-30 11:16:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:52,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:52,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:52,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822344191] [2023-08-30 11:16:52,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822344191] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:52,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037856] [2023-08-30 11:16:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:52,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:52,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:52,998 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:52,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 11:16:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 11:16:53,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:53,217 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 [2023-08-30 11:16:53,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:16:53,256 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 [2023-08-30 11:16:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:53,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:53,334 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_672 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_672) |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 [2023-08-30 11:16:53,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:16:53,340 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 [2023-08-30 11:16:53,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:16:53,345 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 37 treesize of output 31 [2023-08-30 11:16:53,361 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 7 treesize of output 3 [2023-08-30 11:16:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 11:16:53,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037856] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:53,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:53,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-30 11:16:53,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653919117] [2023-08-30 11:16:53,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:53,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 11:16:53,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 11:16:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=230, Unknown=1, NotChecked=30, Total=306 [2023-08-30 11:16:53,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 465 out of 1270 [2023-08-30 11:16:53,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 1303 flow. Second operand has 18 states, 18 states have (on average 466.3333333333333) internal successors, (8394), 18 states have internal predecessors, (8394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:53,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:53,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 465 of 1270 [2023-08-30 11:16:53,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:55,552 INFO L130 PetriNetUnfolder]: 5010/8550 cut-off events. [2023-08-30 11:16:55,552 INFO L131 PetriNetUnfolder]: For 63537/63537 co-relation queries the response was YES. [2023-08-30 11:16:55,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47251 conditions, 8550 events. 5010/8550 cut-off events. For 63537/63537 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 63244 event pairs, 1898 based on Foata normal form. 6/8289 useless extension candidates. Maximal degree in co-relation 47203. Up to 5071 conditions per place. [2023-08-30 11:16:55,610 INFO L137 encePairwiseOnDemand]: 1253/1270 looper letters, 73 selfloop transitions, 61 changer transitions 1/135 dead transitions. [2023-08-30 11:16:55,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 135 transitions, 1964 flow [2023-08-30 11:16:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:16:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:16:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5674 transitions. [2023-08-30 11:16:55,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37230971128608925 [2023-08-30 11:16:55,614 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5674 transitions. [2023-08-30 11:16:55,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5674 transitions. [2023-08-30 11:16:55,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:55,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5674 transitions. [2023-08-30 11:16:55,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 472.8333333333333) internal successors, (5674), 12 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:55,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1270.0) internal successors, (16510), 13 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:55,625 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1270.0) internal successors, (16510), 13 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:55,625 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 1303 flow. Second operand 12 states and 5674 transitions. [2023-08-30 11:16:55,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 135 transitions, 1964 flow [2023-08-30 11:16:55,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 135 transitions, 1956 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 11:16:55,715 INFO L231 Difference]: Finished difference. Result has 127 places, 113 transitions, 1702 flow [2023-08-30 11:16:55,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1702, PETRI_PLACES=127, PETRI_TRANSITIONS=113} [2023-08-30 11:16:55,716 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 53 predicate places. [2023-08-30 11:16:55,716 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 113 transitions, 1702 flow [2023-08-30 11:16:55,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 466.3333333333333) internal successors, (8394), 18 states have internal predecessors, (8394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:55,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:55,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:55,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:55,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:55,921 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:55,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:55,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1951612835, now seen corresponding path program 2 times [2023-08-30 11:16:55,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:55,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6065620] [2023-08-30 11:16:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:55,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:56,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:56,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6065620] [2023-08-30 11:16:56,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6065620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:56,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671045290] [2023-08-30 11:16:56,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:16:56,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:56,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:56,181 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:56,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 11:16:56,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:16:56,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:16:56,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 11:16:56,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:56,405 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 [2023-08-30 11:16:56,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:16:56,447 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 [2023-08-30 11:16:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:56,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:56,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:16:56,567 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 [2023-08-30 11:16:56,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:16:56,576 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 43 treesize of output 37 [2023-08-30 11:16:56,586 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 9 treesize of output 5 [2023-08-30 11:16:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:56,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671045290] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:56,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:56,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-30 11:16:56,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907325341] [2023-08-30 11:16:56,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:56,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 11:16:56,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 11:16:56,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=226, Unknown=3, NotChecked=0, Total=272 [2023-08-30 11:16:57,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 485 out of 1270 [2023-08-30 11:16:57,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 113 transitions, 1702 flow. Second operand has 17 states, 17 states have (on average 486.29411764705884) internal successors, (8267), 17 states have internal predecessors, (8267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:57,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:57,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 485 of 1270 [2023-08-30 11:16:57,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:16:59,374 INFO L130 PetriNetUnfolder]: 5004/8538 cut-off events. [2023-08-30 11:16:59,374 INFO L131 PetriNetUnfolder]: For 75908/75908 co-relation queries the response was YES. [2023-08-30 11:16:59,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49345 conditions, 8538 events. 5004/8538 cut-off events. For 75908/75908 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 62905 event pairs, 1553 based on Foata normal form. 6/8283 useless extension candidates. Maximal degree in co-relation 49293. Up to 4333 conditions per place. [2023-08-30 11:16:59,433 INFO L137 encePairwiseOnDemand]: 1253/1270 looper letters, 79 selfloop transitions, 53 changer transitions 1/133 dead transitions. [2023-08-30 11:16:59,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 133 transitions, 2097 flow [2023-08-30 11:16:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:16:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:16:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5916 transitions. [2023-08-30 11:16:59,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38818897637795274 [2023-08-30 11:16:59,437 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5916 transitions. [2023-08-30 11:16:59,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5916 transitions. [2023-08-30 11:16:59,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:16:59,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5916 transitions. [2023-08-30 11:16:59,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 493.0) internal successors, (5916), 12 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:59,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1270.0) internal successors, (16510), 13 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:59,447 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1270.0) internal successors, (16510), 13 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:59,447 INFO L175 Difference]: Start difference. First operand has 127 places, 113 transitions, 1702 flow. Second operand 12 states and 5916 transitions. [2023-08-30 11:16:59,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 133 transitions, 2097 flow [2023-08-30 11:16:59,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 133 transitions, 1950 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-30 11:16:59,560 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 1655 flow [2023-08-30 11:16:59,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1655, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2023-08-30 11:16:59,561 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 58 predicate places. [2023-08-30 11:16:59,561 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 1655 flow [2023-08-30 11:16:59,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 486.29411764705884) internal successors, (8267), 17 states have internal predecessors, (8267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:59,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:59,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:59,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:59,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:59,763 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:16:59,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1953823202, now seen corresponding path program 1 times [2023-08-30 11:16:59,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:59,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600746544] [2023-08-30 11:16:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:59,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:16:59,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:59,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600746544] [2023-08-30 11:16:59,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600746544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:59,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614871022] [2023-08-30 11:16:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:59,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:59,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:59,970 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:59,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 11:17:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 11:17:00,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:17:00,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:01,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:17:01,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 500 treesize of output 428 [2023-08-30 11:17:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:17:01,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614871022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:01,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:01,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 11:17:01,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390820076] [2023-08-30 11:17:01,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:01,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 11:17:01,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:01,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 11:17:01,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-30 11:17:02,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 485 out of 1270 [2023-08-30 11:17:02,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 1655 flow. Second operand has 11 states, 11 states have (on average 486.8181818181818) internal successors, (5355), 11 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:02,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:02,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 485 of 1270 [2023-08-30 11:17:02,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:04,792 INFO L130 PetriNetUnfolder]: 6825/11417 cut-off events. [2023-08-30 11:17:04,792 INFO L131 PetriNetUnfolder]: For 76234/76234 co-relation queries the response was YES. [2023-08-30 11:17:04,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65237 conditions, 11417 events. 6825/11417 cut-off events. For 76234/76234 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 85051 event pairs, 1623 based on Foata normal form. 105/11111 useless extension candidates. Maximal degree in co-relation 65186. Up to 4176 conditions per place. [2023-08-30 11:17:04,879 INFO L137 encePairwiseOnDemand]: 1254/1270 looper letters, 207 selfloop transitions, 65 changer transitions 0/272 dead transitions. [2023-08-30 11:17:04,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 272 transitions, 3514 flow [2023-08-30 11:17:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 11:17:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 11:17:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 6473 transitions. [2023-08-30 11:17:04,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920654149000606 [2023-08-30 11:17:04,884 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 6473 transitions. [2023-08-30 11:17:04,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 6473 transitions. [2023-08-30 11:17:04,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:04,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 6473 transitions. [2023-08-30 11:17:04,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 497.9230769230769) internal successors, (6473), 13 states have internal predecessors, (6473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:04,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 1270.0) internal successors, (17780), 14 states have internal predecessors, (17780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:04,900 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 1270.0) internal successors, (17780), 14 states have internal predecessors, (17780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:04,900 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 1655 flow. Second operand 13 states and 6473 transitions. [2023-08-30 11:17:04,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 272 transitions, 3514 flow [2023-08-30 11:17:05,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 272 transitions, 3436 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-30 11:17:05,140 INFO L231 Difference]: Finished difference. Result has 141 places, 130 transitions, 2087 flow [2023-08-30 11:17:05,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2087, PETRI_PLACES=141, PETRI_TRANSITIONS=130} [2023-08-30 11:17:05,140 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 67 predicate places. [2023-08-30 11:17:05,141 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 130 transitions, 2087 flow [2023-08-30 11:17:05,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 486.8181818181818) internal successors, (5355), 11 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:05,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:17:05,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:17:05,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 11:17:05,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:05,348 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:17:05,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:17:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1953823203, now seen corresponding path program 1 times [2023-08-30 11:17:05,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:17:05,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034312514] [2023-08-30 11:17:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:05,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:17:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:17:05,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:17:05,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034312514] [2023-08-30 11:17:05,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034312514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:17:05,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355904022] [2023-08-30 11:17:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:05,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:05,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:05,503 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:17:05,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 11:17:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:05,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 11:17:05,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:06,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2023-08-30 11:17:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:17:06,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:06,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 416 treesize of output 376 [2023-08-30 11:17:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:17:06,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355904022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:06,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:06,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-30 11:17:06,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383567210] [2023-08-30 11:17:06,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:06,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 11:17:06,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 11:17:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-30 11:17:06,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1270 [2023-08-30 11:17:07,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 130 transitions, 2087 flow. Second operand has 9 states, 9 states have (on average 488.8888888888889) internal successors, (4400), 9 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:07,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:07,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1270 [2023-08-30 11:17:07,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:09,549 INFO L130 PetriNetUnfolder]: 6516/11000 cut-off events. [2023-08-30 11:17:09,549 INFO L131 PetriNetUnfolder]: For 86200/86200 co-relation queries the response was YES. [2023-08-30 11:17:09,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63555 conditions, 11000 events. 6516/11000 cut-off events. For 86200/86200 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 81971 event pairs, 1215 based on Foata normal form. 261/11000 useless extension candidates. Maximal degree in co-relation 63501. Up to 4922 conditions per place. [2023-08-30 11:17:09,647 INFO L137 encePairwiseOnDemand]: 1253/1270 looper letters, 177 selfloop transitions, 64 changer transitions 0/241 dead transitions. [2023-08-30 11:17:09,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 241 transitions, 3332 flow [2023-08-30 11:17:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:17:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:17:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5980 transitions. [2023-08-30 11:17:09,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39238845144356954 [2023-08-30 11:17:09,651 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5980 transitions. [2023-08-30 11:17:09,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5980 transitions. [2023-08-30 11:17:09,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:09,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5980 transitions. [2023-08-30 11:17:09,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 498.3333333333333) internal successors, (5980), 12 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:09,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1270.0) internal successors, (16510), 13 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:09,662 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1270.0) internal successors, (16510), 13 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:09,662 INFO L175 Difference]: Start difference. First operand has 141 places, 130 transitions, 2087 flow. Second operand 12 states and 5980 transitions. [2023-08-30 11:17:09,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 241 transitions, 3332 flow [2023-08-30 11:17:09,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 241 transitions, 3308 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 11:17:09,907 INFO L231 Difference]: Finished difference. Result has 154 places, 132 transitions, 2220 flow [2023-08-30 11:17:09,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2220, PETRI_PLACES=154, PETRI_TRANSITIONS=132} [2023-08-30 11:17:09,908 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 80 predicate places. [2023-08-30 11:17:09,908 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 132 transitions, 2220 flow [2023-08-30 11:17:09,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 488.8888888888889) internal successors, (4400), 9 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:09,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:17:09,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:17:09,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 11:17:10,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:10,109 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:17:10,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:17:10,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1945176322, now seen corresponding path program 1 times [2023-08-30 11:17:10,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:17:10,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551877486] [2023-08-30 11:17:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:10,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:17:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:10,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:17:10,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551877486] [2023-08-30 11:17:10,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551877486] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:17:10,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957566002] [2023-08-30 11:17:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:10,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:10,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:10,557 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:17:10,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 11:17:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:10,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:17:10,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:10,814 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 [2023-08-30 11:17:10,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:17:10,848 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 [2023-08-30 11:17:10,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:17:10,884 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 [2023-08-30 11:17:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:11,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:12,926 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_803 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_803) c_~A~0.base)) (.cse2 (* c_~j~0 4))) (let ((.cse0 (select .cse1 (+ c_~A~0.offset .cse2)))) (or (< (+ c_~bag2~0 .cse0 2147483648) 0) (< 0 (+ (select .cse1 (+ c_~A~0.offset .cse2 4)) 9223372039002259456)) (< 2147483647 (+ c_~bag2~0 .cse0)) (< 4294967295 .cse0) (< (+ 9223372039002259455 .cse0) 0))))) is different from false [2023-08-30 11:17:12,961 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_803 (Array Int Int)) (v_ArrVal_802 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_802) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< 2147483647 .cse0) (< (+ .cse0 2147483648) 0) (< 0 (+ (select .cse1 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)))))) is different from false [2023-08-30 11:17:12,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:17:12,971 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 82 treesize of output 58 [2023-08-30 11:17:12,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:17:12,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 401 treesize of output 381 [2023-08-30 11:17:12,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 72 [2023-08-30 11:17:13,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:17:13,037 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 85 treesize of output 69 [2023-08-30 11:17:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 11:17:13,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957566002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:13,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:13,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 11:17:13,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704744759] [2023-08-30 11:17:13,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:13,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:17:13,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:17:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=265, Unknown=2, NotChecked=66, Total=380 [2023-08-30 11:17:13,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 445 out of 1270 [2023-08-30 11:17:13,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 132 transitions, 2220 flow. Second operand has 20 states, 20 states have (on average 446.35) internal successors, (8927), 20 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:13,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:13,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 445 of 1270 [2023-08-30 11:17:13,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:18,104 INFO L130 PetriNetUnfolder]: 10072/16936 cut-off events. [2023-08-30 11:17:18,105 INFO L131 PetriNetUnfolder]: For 218543/218543 co-relation queries the response was YES. [2023-08-30 11:17:18,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100013 conditions, 16936 events. 10072/16936 cut-off events. For 218543/218543 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 136635 event pairs, 761 based on Foata normal form. 680/17616 useless extension candidates. Maximal degree in co-relation 99955. Up to 3580 conditions per place. [2023-08-30 11:17:18,230 INFO L137 encePairwiseOnDemand]: 1261/1270 looper letters, 856 selfloop transitions, 27 changer transitions 4/887 dead transitions. [2023-08-30 11:17:18,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 887 transitions, 16989 flow [2023-08-30 11:17:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 11:17:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 11:17:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 8754 transitions. [2023-08-30 11:17:18,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627849150435143 [2023-08-30 11:17:18,239 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 8754 transitions. [2023-08-30 11:17:18,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 8754 transitions. [2023-08-30 11:17:18,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:18,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 8754 transitions. [2023-08-30 11:17:18,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 460.7368421052632) internal successors, (8754), 19 states have internal predecessors, (8754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:18,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 1270.0) internal successors, (25400), 20 states have internal predecessors, (25400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:18,261 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 1270.0) internal successors, (25400), 20 states have internal predecessors, (25400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:18,261 INFO L175 Difference]: Start difference. First operand has 154 places, 132 transitions, 2220 flow. Second operand 19 states and 8754 transitions. [2023-08-30 11:17:18,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 887 transitions, 16989 flow [2023-08-30 11:17:18,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 887 transitions, 16436 flow, removed 74 selfloop flow, removed 7 redundant places. [2023-08-30 11:17:18,504 INFO L231 Difference]: Finished difference. Result has 168 places, 146 transitions, 2326 flow [2023-08-30 11:17:18,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=2140, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2326, PETRI_PLACES=168, PETRI_TRANSITIONS=146} [2023-08-30 11:17:18,504 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 94 predicate places. [2023-08-30 11:17:18,504 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 146 transitions, 2326 flow [2023-08-30 11:17:18,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 446.35) internal successors, (8927), 20 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:18,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:17:18,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:17:18,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 11:17:18,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-30 11:17:18,706 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:17:18,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:17:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash -28329762, now seen corresponding path program 1 times [2023-08-30 11:17:18,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:17:18,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727306883] [2023-08-30 11:17:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:18,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:17:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:17:18,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:17:18,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727306883] [2023-08-30 11:17:18,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727306883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:17:18,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878863689] [2023-08-30 11:17:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:18,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:18,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:18,913 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:17:18,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 11:17:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:19,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:17:19,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:19,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:17:19,773 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 58 treesize of output 54 [2023-08-30 11:17:19,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-08-30 11:17:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:17:19,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:20,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 436 treesize of output 396 [2023-08-30 11:17:20,416 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 15 treesize of output 9 [2023-08-30 11:17:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:17:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878863689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:20,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:20,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 11:17:20,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744217220] [2023-08-30 11:17:20,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:20,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:17:20,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:17:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=140, Unknown=3, NotChecked=0, Total=182 [2023-08-30 11:17:20,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 463 out of 1270 [2023-08-30 11:17:20,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 146 transitions, 2326 flow. Second operand has 14 states, 14 states have (on average 464.57142857142856) internal successors, (6504), 14 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:20,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:20,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 463 of 1270 [2023-08-30 11:17:20,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:24,510 INFO L130 PetriNetUnfolder]: 9593/16132 cut-off events. [2023-08-30 11:17:24,510 INFO L131 PetriNetUnfolder]: For 205486/205486 co-relation queries the response was YES. [2023-08-30 11:17:24,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102434 conditions, 16132 events. 9593/16132 cut-off events. For 205486/205486 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 126380 event pairs, 2994 based on Foata normal form. 325/16457 useless extension candidates. Maximal degree in co-relation 102374. Up to 6919 conditions per place. [2023-08-30 11:17:24,712 INFO L137 encePairwiseOnDemand]: 1257/1270 looper letters, 130 selfloop transitions, 59 changer transitions 0/189 dead transitions. [2023-08-30 11:17:24,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 189 transitions, 3053 flow [2023-08-30 11:17:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:17:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:17:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2365 transitions. [2023-08-30 11:17:24,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724409448818898 [2023-08-30 11:17:24,715 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2365 transitions. [2023-08-30 11:17:24,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2365 transitions. [2023-08-30 11:17:24,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:24,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2365 transitions. [2023-08-30 11:17:24,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:24,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:24,720 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1270.0) internal successors, (7620), 6 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:24,720 INFO L175 Difference]: Start difference. First operand has 168 places, 146 transitions, 2326 flow. Second operand 5 states and 2365 transitions. [2023-08-30 11:17:24,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 189 transitions, 3053 flow [2023-08-30 11:17:25,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 189 transitions, 2813 flow, removed 31 selfloop flow, removed 10 redundant places. [2023-08-30 11:17:25,107 INFO L231 Difference]: Finished difference. Result has 159 places, 142 transitions, 2232 flow [2023-08-30 11:17:25,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2232, PETRI_PLACES=159, PETRI_TRANSITIONS=142} [2023-08-30 11:17:25,108 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 85 predicate places. [2023-08-30 11:17:25,108 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 142 transitions, 2232 flow [2023-08-30 11:17:25,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 464.57142857142856) internal successors, (6504), 14 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:25,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:17:25,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:17:25,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 11:17:25,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 11:17:25,316 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:17:25,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:17:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1945176437, now seen corresponding path program 1 times [2023-08-30 11:17:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:17:25,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759255776] [2023-08-30 11:17:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:17:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:17:25,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:17:25,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759255776] [2023-08-30 11:17:25,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759255776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:17:25,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999396070] [2023-08-30 11:17:25,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:25,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:25,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:25,669 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:17:25,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 11:17:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:25,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 11:17:25,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:17:27,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:28,454 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 11:17:28,454 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 728 treesize of output 632 [2023-08-30 11:17:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:17:28,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999396070] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:28,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:28,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-30 11:17:28,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277646967] [2023-08-30 11:17:28,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:28,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 11:17:28,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:28,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 11:17:28,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-30 11:17:29,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 483 out of 1270 [2023-08-30 11:17:29,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 142 transitions, 2232 flow. Second operand has 9 states, 9 states have (on average 485.44444444444446) internal successors, (4369), 9 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:29,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:29,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 483 of 1270 [2023-08-30 11:17:29,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:32,616 INFO L130 PetriNetUnfolder]: 8141/13708 cut-off events. [2023-08-30 11:17:32,616 INFO L131 PetriNetUnfolder]: For 168286/168286 co-relation queries the response was YES. [2023-08-30 11:17:32,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84809 conditions, 13708 events. 8141/13708 cut-off events. For 168286/168286 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 105581 event pairs, 913 based on Foata normal form. 972/14194 useless extension candidates. Maximal degree in co-relation 84751. Up to 3672 conditions per place. [2023-08-30 11:17:32,710 INFO L137 encePairwiseOnDemand]: 1262/1270 looper letters, 421 selfloop transitions, 17 changer transitions 0/438 dead transitions. [2023-08-30 11:17:32,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 438 transitions, 8192 flow [2023-08-30 11:17:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:17:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:17:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3991 transitions. [2023-08-30 11:17:32,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3928149606299213 [2023-08-30 11:17:32,713 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3991 transitions. [2023-08-30 11:17:32,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3991 transitions. [2023-08-30 11:17:32,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:32,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3991 transitions. [2023-08-30 11:17:32,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 498.875) internal successors, (3991), 8 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:32,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1270.0) internal successors, (11430), 9 states have internal predecessors, (11430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:32,723 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1270.0) internal successors, (11430), 9 states have internal predecessors, (11430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:32,723 INFO L175 Difference]: Start difference. First operand has 159 places, 142 transitions, 2232 flow. Second operand 8 states and 3991 transitions. [2023-08-30 11:17:32,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 438 transitions, 8192 flow [2023-08-30 11:17:32,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 438 transitions, 7710 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 11:17:32,905 INFO L231 Difference]: Finished difference. Result has 163 places, 139 transitions, 2133 flow [2023-08-30 11:17:32,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2133, PETRI_PLACES=163, PETRI_TRANSITIONS=139} [2023-08-30 11:17:32,906 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 89 predicate places. [2023-08-30 11:17:32,906 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 139 transitions, 2133 flow [2023-08-30 11:17:32,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 485.44444444444446) internal successors, (4369), 9 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:32,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:17:32,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:17:32,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 11:17:33,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 11:17:33,109 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:17:33,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:17:33,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1945176432, now seen corresponding path program 1 times [2023-08-30 11:17:33,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:17:33,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843279415] [2023-08-30 11:17:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:33,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:17:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:33,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:17:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843279415] [2023-08-30 11:17:33,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843279415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:17:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216437701] [2023-08-30 11:17:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:33,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:33,481 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:17:33,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 11:17:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:33,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:17:33,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:33,776 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 [2023-08-30 11:17:33,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:17:33,816 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 [2023-08-30 11:17:33,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:17:33,846 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 [2023-08-30 11:17:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:34,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:36,057 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_906 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_906) c_~A~0.base)) (.cse2 (* c_~j~0 4))) (let ((.cse0 (select .cse1 (+ c_~A~0.offset .cse2)))) (or (< (+ c_~bag2~0 .cse0 2147483648) 0) (< (+ 9223372039002259455 .cse0) 0) (< 2147483647 (+ c_~bag2~0 .cse0)) (< 4294967295 .cse0) (< (select .cse1 (+ c_~A~0.offset .cse2 4)) 4294967296))))) is different from false [2023-08-30 11:17:36,097 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_906 (Array Int Int)) (v_ArrVal_905 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_905) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_906) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< 2147483647 .cse0) (< (select .cse1 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296) (< (+ 2147483648 .cse0) 0))))) is different from false [2023-08-30 11:17:36,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:17:36,108 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 80 treesize of output 56 [2023-08-30 11:17:36,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:17:36,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 383 treesize of output 363 [2023-08-30 11:17:36,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 68 [2023-08-30 11:17:36,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:17:36,140 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 81 treesize of output 65 [2023-08-30 11:17:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 11:17:36,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216437701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:36,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:36,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 11:17:36,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491712723] [2023-08-30 11:17:36,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:36,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:17:36,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:36,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:17:36,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=266, Unknown=2, NotChecked=66, Total=380 [2023-08-30 11:17:36,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 445 out of 1270 [2023-08-30 11:17:36,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 139 transitions, 2133 flow. Second operand has 20 states, 20 states have (on average 446.35) internal successors, (8927), 20 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:36,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:36,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 445 of 1270 [2023-08-30 11:17:36,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:40,211 INFO L130 PetriNetUnfolder]: 7173/12092 cut-off events. [2023-08-30 11:17:40,211 INFO L131 PetriNetUnfolder]: For 126770/126770 co-relation queries the response was YES. [2023-08-30 11:17:40,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78034 conditions, 12092 events. 7173/12092 cut-off events. For 126770/126770 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 92275 event pairs, 933 based on Foata normal form. 648/12740 useless extension candidates. Maximal degree in co-relation 77975. Up to 2917 conditions per place. [2023-08-30 11:17:40,297 INFO L137 encePairwiseOnDemand]: 1262/1270 looper letters, 645 selfloop transitions, 16 changer transitions 0/661 dead transitions. [2023-08-30 11:17:40,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 661 transitions, 11817 flow [2023-08-30 11:17:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:17:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:17:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 6437 transitions. [2023-08-30 11:17:40,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620359955005624 [2023-08-30 11:17:40,303 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 6437 transitions. [2023-08-30 11:17:40,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 6437 transitions. [2023-08-30 11:17:40,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:40,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 6437 transitions. [2023-08-30 11:17:40,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 459.7857142857143) internal successors, (6437), 14 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:40,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 1270.0) internal successors, (19050), 15 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:40,319 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 1270.0) internal successors, (19050), 15 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:40,319 INFO L175 Difference]: Start difference. First operand has 163 places, 139 transitions, 2133 flow. Second operand 14 states and 6437 transitions. [2023-08-30 11:17:40,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 661 transitions, 11817 flow [2023-08-30 11:17:40,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 661 transitions, 11789 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 11:17:40,636 INFO L231 Difference]: Finished difference. Result has 169 places, 136 transitions, 2117 flow [2023-08-30 11:17:40,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2117, PETRI_PLACES=169, PETRI_TRANSITIONS=136} [2023-08-30 11:17:40,637 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 95 predicate places. [2023-08-30 11:17:40,637 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 136 transitions, 2117 flow [2023-08-30 11:17:40,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 446.35) internal successors, (8927), 20 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:40,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:17:40,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:17:40,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 11:17:40,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:40,845 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:17:40,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:17:40,845 INFO L85 PathProgramCache]: Analyzing trace with hash -28329640, now seen corresponding path program 1 times [2023-08-30 11:17:40,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:17:40,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231716270] [2023-08-30 11:17:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:40,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:17:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:17:41,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:17:41,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231716270] [2023-08-30 11:17:41,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231716270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:17:41,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42573187] [2023-08-30 11:17:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:41,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:41,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:41,057 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:17:41,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 11:17:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:41,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 11:17:41,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:41,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:17:41,603 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 40 treesize of output 36 [2023-08-30 11:17:41,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2023-08-30 11:17:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:41,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:42,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 432 treesize of output 392 [2023-08-30 11:17:42,570 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 9 treesize of output 3 [2023-08-30 11:17:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:42,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42573187] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:42,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:42,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2023-08-30 11:17:42,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609946544] [2023-08-30 11:17:42,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:42,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 11:17:42,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:42,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 11:17:42,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-08-30 11:17:43,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 470 out of 1270 [2023-08-30 11:17:43,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 136 transitions, 2117 flow. Second operand has 21 states, 21 states have (on average 471.2857142857143) internal successors, (9897), 21 states have internal predecessors, (9897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:43,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:43,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 470 of 1270 [2023-08-30 11:17:43,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:50,247 INFO L130 PetriNetUnfolder]: 13700/22732 cut-off events. [2023-08-30 11:17:50,247 INFO L131 PetriNetUnfolder]: For 186998/186998 co-relation queries the response was YES. [2023-08-30 11:17:50,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149449 conditions, 22732 events. 13700/22732 cut-off events. For 186998/186998 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 178040 event pairs, 1184 based on Foata normal form. 602/22434 useless extension candidates. Maximal degree in co-relation 149391. Up to 5471 conditions per place. [2023-08-30 11:17:50,431 INFO L137 encePairwiseOnDemand]: 1252/1270 looper letters, 507 selfloop transitions, 148 changer transitions 14/669 dead transitions. [2023-08-30 11:17:50,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 669 transitions, 9181 flow [2023-08-30 11:17:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 11:17:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 11:17:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 13968 transitions. [2023-08-30 11:17:50,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792560412707032 [2023-08-30 11:17:50,440 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 13968 transitions. [2023-08-30 11:17:50,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 13968 transitions. [2023-08-30 11:17:50,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:50,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 13968 transitions. [2023-08-30 11:17:50,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 481.6551724137931) internal successors, (13968), 29 states have internal predecessors, (13968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:50,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 1270.0) internal successors, (38100), 30 states have internal predecessors, (38100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:50,471 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 1270.0) internal successors, (38100), 30 states have internal predecessors, (38100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:50,472 INFO L175 Difference]: Start difference. First operand has 169 places, 136 transitions, 2117 flow. Second operand 29 states and 13968 transitions. [2023-08-30 11:17:50,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 669 transitions, 9181 flow [2023-08-30 11:17:51,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 669 transitions, 8793 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-30 11:17:51,125 INFO L231 Difference]: Finished difference. Result has 192 places, 211 transitions, 3953 flow [2023-08-30 11:17:51,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3953, PETRI_PLACES=192, PETRI_TRANSITIONS=211} [2023-08-30 11:17:51,125 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 118 predicate places. [2023-08-30 11:17:51,125 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 211 transitions, 3953 flow [2023-08-30 11:17:51,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 471.2857142857143) internal successors, (9897), 21 states have internal predecessors, (9897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:51,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:17:51,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:17:51,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 11:17:51,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 11:17:51,327 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:17:51,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:17:51,328 INFO L85 PathProgramCache]: Analyzing trace with hash 438947479, now seen corresponding path program 1 times [2023-08-30 11:17:51,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:17:51,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939374183] [2023-08-30 11:17:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:51,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:17:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:51,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:17:51,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939374183] [2023-08-30 11:17:51,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939374183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:17:51,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460853311] [2023-08-30 11:17:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:17:51,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:17:51,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:17:51,657 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:17:51,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 11:17:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:17:51,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:17:51,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:17:51,940 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 [2023-08-30 11:17:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:17:51,986 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 [2023-08-30 11:17:52,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:17:52,048 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 [2023-08-30 11:17:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:17:52,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:17:52,127 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_975 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_975) c_~A~0.base) (+ c_~A~0.offset (* c_~i~0 4) 4)) 4294967296)) is different from false [2023-08-30 11:17:52,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:17:52,165 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 [2023-08-30 11:17:52,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:17:52,173 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 141 treesize of output 129 [2023-08-30 11:17:52,178 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 25 treesize of output 21 [2023-08-30 11:17:52,200 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 16 [2023-08-30 11:17:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 11:17:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460853311] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:17:52,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:17:52,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 11:17:52,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860495294] [2023-08-30 11:17:52,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:17:52,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:17:52,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:17:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:17:52,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=391, Unknown=8, NotChecked=40, Total=506 [2023-08-30 11:17:52,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 462 out of 1270 [2023-08-30 11:17:52,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 211 transitions, 3953 flow. Second operand has 23 states, 23 states have (on average 463.30434782608694) internal successors, (10656), 23 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:52,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:17:52,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 462 of 1270 [2023-08-30 11:17:52,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:59,607 INFO L130 PetriNetUnfolder]: 14601/24187 cut-off events. [2023-08-30 11:17:59,607 INFO L131 PetriNetUnfolder]: For 272462/272462 co-relation queries the response was YES. [2023-08-30 11:17:59,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167646 conditions, 24187 events. 14601/24187 cut-off events. For 272462/272462 co-relation queries the response was YES. Maximal size of possible extension queue 1090. Compared 190541 event pairs, 4584 based on Foata normal form. 472/23699 useless extension candidates. Maximal degree in co-relation 167583. Up to 11578 conditions per place. [2023-08-30 11:17:59,810 INFO L137 encePairwiseOnDemand]: 1254/1270 looper letters, 178 selfloop transitions, 127 changer transitions 0/305 dead transitions. [2023-08-30 11:17:59,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 305 transitions, 5424 flow [2023-08-30 11:17:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 11:17:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 11:17:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 4715 transitions. [2023-08-30 11:17:59,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371259842519685 [2023-08-30 11:17:59,813 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 4715 transitions. [2023-08-30 11:17:59,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 4715 transitions. [2023-08-30 11:17:59,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:59,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 4715 transitions. [2023-08-30 11:17:59,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 471.5) internal successors, (4715), 10 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:59,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1270.0) internal successors, (13970), 11 states have internal predecessors, (13970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:59,820 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1270.0) internal successors, (13970), 11 states have internal predecessors, (13970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:59,821 INFO L175 Difference]: Start difference. First operand has 192 places, 211 transitions, 3953 flow. Second operand 10 states and 4715 transitions. [2023-08-30 11:17:59,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 305 transitions, 5424 flow [2023-08-30 11:18:02,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 305 transitions, 5049 flow, removed 39 selfloop flow, removed 12 redundant places. [2023-08-30 11:18:02,526 INFO L231 Difference]: Finished difference. Result has 183 places, 217 transitions, 4126 flow [2023-08-30 11:18:02,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4126, PETRI_PLACES=183, PETRI_TRANSITIONS=217} [2023-08-30 11:18:02,527 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 109 predicate places. [2023-08-30 11:18:02,527 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 217 transitions, 4126 flow [2023-08-30 11:18:02,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 463.30434782608694) internal successors, (10656), 23 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:02,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:18:02,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:18:02,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 11:18:02,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 11:18:02,729 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:18:02,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:18:02,729 INFO L85 PathProgramCache]: Analyzing trace with hash 438972524, now seen corresponding path program 1 times [2023-08-30 11:18:02,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:18:02,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324789873] [2023-08-30 11:18:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:02,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:18:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:03,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:18:03,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324789873] [2023-08-30 11:18:03,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324789873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:18:03,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283908841] [2023-08-30 11:18:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:03,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:03,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:18:03,053 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:18:03,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 11:18:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:03,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:18:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:18:03,375 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 [2023-08-30 11:18:03,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:18:03,415 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 [2023-08-30 11:18:03,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:18:03,481 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 [2023-08-30 11:18:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:03,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:18:03,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:18:03,625 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 [2023-08-30 11:18:03,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:18:03,631 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 81 treesize of output 75 [2023-08-30 11:18:03,634 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 [2023-08-30 11:18:03,637 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 [2023-08-30 11:18:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:03,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283908841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:18:03,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:18:03,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 11:18:03,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048389478] [2023-08-30 11:18:03,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:18:03,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:18:03,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:18:03,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:18:03,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=430, Unknown=6, NotChecked=0, Total=506 [2023-08-30 11:18:04,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 482 out of 1270 [2023-08-30 11:18:04,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 217 transitions, 4126 flow. Second operand has 23 states, 23 states have (on average 483.30434782608694) internal successors, (11116), 23 states have internal predecessors, (11116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:04,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:18:04,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 482 of 1270 [2023-08-30 11:18:04,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:18:11,556 INFO L130 PetriNetUnfolder]: 14340/23749 cut-off events. [2023-08-30 11:18:11,556 INFO L131 PetriNetUnfolder]: For 216645/216645 co-relation queries the response was YES. [2023-08-30 11:18:11,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169185 conditions, 23749 events. 14340/23749 cut-off events. For 216645/216645 co-relation queries the response was YES. Maximal size of possible extension queue 1056. Compared 186190 event pairs, 2876 based on Foata normal form. 354/22533 useless extension candidates. Maximal degree in co-relation 169126. Up to 8287 conditions per place. [2023-08-30 11:18:11,766 INFO L137 encePairwiseOnDemand]: 1253/1270 looper letters, 206 selfloop transitions, 98 changer transitions 0/304 dead transitions. [2023-08-30 11:18:11,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 304 transitions, 5421 flow [2023-08-30 11:18:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 11:18:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 11:18:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 4919 transitions. [2023-08-30 11:18:11,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3873228346456693 [2023-08-30 11:18:11,769 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 4919 transitions. [2023-08-30 11:18:11,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 4919 transitions. [2023-08-30 11:18:11,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:18:11,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 4919 transitions. [2023-08-30 11:18:11,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 491.9) internal successors, (4919), 10 states have internal predecessors, (4919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:11,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1270.0) internal successors, (13970), 11 states have internal predecessors, (13970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:11,776 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1270.0) internal successors, (13970), 11 states have internal predecessors, (13970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:11,777 INFO L175 Difference]: Start difference. First operand has 183 places, 217 transitions, 4126 flow. Second operand 10 states and 4919 transitions. [2023-08-30 11:18:11,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 304 transitions, 5421 flow [2023-08-30 11:18:13,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 304 transitions, 5377 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 11:18:13,608 INFO L231 Difference]: Finished difference. Result has 186 places, 219 transitions, 4402 flow [2023-08-30 11:18:13,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4402, PETRI_PLACES=186, PETRI_TRANSITIONS=219} [2023-08-30 11:18:13,608 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 112 predicate places. [2023-08-30 11:18:13,609 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 219 transitions, 4402 flow [2023-08-30 11:18:13,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 483.30434782608694) internal successors, (11116), 23 states have internal predecessors, (11116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:13,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:18:13,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:18:13,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 11:18:13,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-30 11:18:13,810 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:18:13,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:18:13,811 INFO L85 PathProgramCache]: Analyzing trace with hash 723249936, now seen corresponding path program 1 times [2023-08-30 11:18:13,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:18:13,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954094623] [2023-08-30 11:18:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:18:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:18:14,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:18:14,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954094623] [2023-08-30 11:18:14,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954094623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:18:14,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456265641] [2023-08-30 11:18:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:14,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:14,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:18:14,061 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:18:14,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 11:18:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:14,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:18:14,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:18:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 11:18:14,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:18:14,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456265641] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:18:14,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:18:14,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2023-08-30 11:18:14,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742301909] [2023-08-30 11:18:14,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:18:14,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:18:14,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:18:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:18:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:18:14,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 1270 [2023-08-30 11:18:14,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 219 transitions, 4402 flow. Second operand has 3 states, 3 states have (on average 479.3333333333333) internal successors, (1438), 3 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:14,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:18:14,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 1270 [2023-08-30 11:18:14,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:18:21,012 INFO L130 PetriNetUnfolder]: 13688/22731 cut-off events. [2023-08-30 11:18:21,012 INFO L131 PetriNetUnfolder]: For 248813/248813 co-relation queries the response was YES. [2023-08-30 11:18:21,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171128 conditions, 22731 events. 13688/22731 cut-off events. For 248813/248813 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 174873 event pairs, 7419 based on Foata normal form. 484/21705 useless extension candidates. Maximal degree in co-relation 171068. Up to 18639 conditions per place. [2023-08-30 11:18:21,202 INFO L137 encePairwiseOnDemand]: 1263/1270 looper letters, 176 selfloop transitions, 57 changer transitions 0/233 dead transitions. [2023-08-30 11:18:21,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 233 transitions, 4973 flow [2023-08-30 11:18:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:18:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:18:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1471 transitions. [2023-08-30 11:18:21,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38608923884514434 [2023-08-30 11:18:21,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1471 transitions. [2023-08-30 11:18:21,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1471 transitions. [2023-08-30 11:18:21,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:18:21,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1471 transitions. [2023-08-30 11:18:21,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 490.3333333333333) internal successors, (1471), 3 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:21,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:21,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1270.0) internal successors, (5080), 4 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:21,208 INFO L175 Difference]: Start difference. First operand has 186 places, 219 transitions, 4402 flow. Second operand 3 states and 1471 transitions. [2023-08-30 11:18:21,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 233 transitions, 4973 flow [2023-08-30 11:18:22,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 233 transitions, 4920 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-30 11:18:22,771 INFO L231 Difference]: Finished difference. Result has 183 places, 217 transitions, 4443 flow [2023-08-30 11:18:22,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=4329, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4443, PETRI_PLACES=183, PETRI_TRANSITIONS=217} [2023-08-30 11:18:22,771 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 109 predicate places. [2023-08-30 11:18:22,771 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 217 transitions, 4443 flow [2023-08-30 11:18:22,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 479.3333333333333) internal successors, (1438), 3 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:22,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:18:22,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:18:22,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 11:18:22,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:22,972 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:18:22,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:18:22,973 INFO L85 PathProgramCache]: Analyzing trace with hash 370453289, now seen corresponding path program 1 times [2023-08-30 11:18:22,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:18:22,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334804250] [2023-08-30 11:18:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:22,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:18:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:23,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:18:23,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334804250] [2023-08-30 11:18:23,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334804250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:18:23,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827454664] [2023-08-30 11:18:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:23,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:23,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:18:23,310 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:18:23,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 11:18:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:23,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 11:18:23,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:18:23,638 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 [2023-08-30 11:18:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:18:23,701 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 [2023-08-30 11:18:23,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:18:23,823 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 [2023-08-30 11:18:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:23,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:18:24,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:18:24,055 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 [2023-08-30 11:18:24,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:18:24,063 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 79 treesize of output 71 [2023-08-30 11:18:24,067 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 60 treesize of output 48 [2023-08-30 11:18:24,072 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 20 [2023-08-30 11:18:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:24,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827454664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:18:24,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:18:24,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-30 11:18:24,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306394586] [2023-08-30 11:18:24,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:18:24,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:18:24,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:18:24,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:18:24,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=439, Unknown=2, NotChecked=0, Total=506 [2023-08-30 11:18:25,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 472 out of 1270 [2023-08-30 11:18:25,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 217 transitions, 4443 flow. Second operand has 23 states, 23 states have (on average 473.30434782608694) internal successors, (10886), 23 states have internal predecessors, (10886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:25,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:18:25,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 472 of 1270 [2023-08-30 11:18:25,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:18:32,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:18:34,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:18:38,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:18:41,682 INFO L130 PetriNetUnfolder]: 14133/23407 cut-off events. [2023-08-30 11:18:41,682 INFO L131 PetriNetUnfolder]: For 284049/284049 co-relation queries the response was YES. [2023-08-30 11:18:41,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179672 conditions, 23407 events. 14133/23407 cut-off events. For 284049/284049 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 181276 event pairs, 3407 based on Foata normal form. 594/22427 useless extension candidates. Maximal degree in co-relation 179614. Up to 5647 conditions per place. [2023-08-30 11:18:41,908 INFO L137 encePairwiseOnDemand]: 1252/1270 looper letters, 569 selfloop transitions, 322 changer transitions 4/895 dead transitions. [2023-08-30 11:18:41,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 895 transitions, 17229 flow [2023-08-30 11:18:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 11:18:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 11:18:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 14966 transitions. [2023-08-30 11:18:41,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38013716027432054 [2023-08-30 11:18:41,915 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 14966 transitions. [2023-08-30 11:18:41,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 14966 transitions. [2023-08-30 11:18:41,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:18:41,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 14966 transitions. [2023-08-30 11:18:41,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 482.7741935483871) internal successors, (14966), 31 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:41,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 1270.0) internal successors, (40640), 32 states have internal predecessors, (40640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:41,945 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 1270.0) internal successors, (40640), 32 states have internal predecessors, (40640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:41,945 INFO L175 Difference]: Start difference. First operand has 183 places, 217 transitions, 4443 flow. Second operand 31 states and 14966 transitions. [2023-08-30 11:18:41,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 895 transitions, 17229 flow [2023-08-30 11:18:44,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 895 transitions, 16886 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-08-30 11:18:44,192 INFO L231 Difference]: Finished difference. Result has 217 places, 489 transitions, 11433 flow [2023-08-30 11:18:44,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=4298, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=11433, PETRI_PLACES=217, PETRI_TRANSITIONS=489} [2023-08-30 11:18:44,192 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 143 predicate places. [2023-08-30 11:18:44,192 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 489 transitions, 11433 flow [2023-08-30 11:18:44,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 473.30434782608694) internal successors, (10886), 23 states have internal predecessors, (10886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:44,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:18:44,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:18:44,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 11:18:44,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:44,394 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:18:44,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:18:44,395 INFO L85 PathProgramCache]: Analyzing trace with hash 170930653, now seen corresponding path program 2 times [2023-08-30 11:18:44,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:18:44,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951004510] [2023-08-30 11:18:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:44,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:18:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:44,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:18:44,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951004510] [2023-08-30 11:18:44,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951004510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:18:44,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326987189] [2023-08-30 11:18:44,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:18:44,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:44,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:18:44,777 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:18:44,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 11:18:45,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:18:45,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:18:45,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 11:18:45,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:18:46,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:18:46,978 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 561 treesize of output 485 [2023-08-30 11:18:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:47,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:18:49,836 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 11:18:49,836 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 801 treesize of output 673 [2023-08-30 11:18:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:50,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326987189] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:18:50,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:18:50,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 11:18:50,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428684214] [2023-08-30 11:18:50,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:18:50,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:18:50,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:18:50,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:18:50,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-08-30 11:18:50,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 1270 [2023-08-30 11:18:50,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 489 transitions, 11433 flow. Second operand has 20 states, 20 states have (on average 477.5) internal successors, (9550), 20 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:50,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:18:50,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 1270 [2023-08-30 11:18:50,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:18:58,141 INFO L130 PetriNetUnfolder]: 12999/21725 cut-off events. [2023-08-30 11:18:58,141 INFO L131 PetriNetUnfolder]: For 434198/434198 co-relation queries the response was YES. [2023-08-30 11:18:58,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174970 conditions, 21725 events. 12999/21725 cut-off events. For 434198/434198 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 177310 event pairs, 608 based on Foata normal form. 548/20973 useless extension candidates. Maximal degree in co-relation 174906. Up to 5099 conditions per place. [2023-08-30 11:18:58,316 INFO L137 encePairwiseOnDemand]: 1261/1270 looper letters, 1960 selfloop transitions, 17 changer transitions 59/2036 dead transitions. [2023-08-30 11:18:58,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 2036 transitions, 50834 flow [2023-08-30 11:18:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:18:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:18:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 6868 transitions. [2023-08-30 11:18:58,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862767154105737 [2023-08-30 11:18:58,321 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 6868 transitions. [2023-08-30 11:18:58,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 6868 transitions. [2023-08-30 11:18:58,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:18:58,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 6868 transitions. [2023-08-30 11:18:58,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 490.57142857142856) internal successors, (6868), 14 states have internal predecessors, (6868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:58,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 1270.0) internal successors, (19050), 15 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:58,332 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 1270.0) internal successors, (19050), 15 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:58,332 INFO L175 Difference]: Start difference. First operand has 217 places, 489 transitions, 11433 flow. Second operand 14 states and 6868 transitions. [2023-08-30 11:18:58,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 2036 transitions, 50834 flow [2023-08-30 11:18:59,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 2036 transitions, 49311 flow, removed 60 selfloop flow, removed 11 redundant places. [2023-08-30 11:18:59,055 INFO L231 Difference]: Finished difference. Result has 219 places, 490 transitions, 11101 flow [2023-08-30 11:18:59,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=11031, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11101, PETRI_PLACES=219, PETRI_TRANSITIONS=490} [2023-08-30 11:18:59,056 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 145 predicate places. [2023-08-30 11:18:59,056 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 490 transitions, 11101 flow [2023-08-30 11:18:59,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 477.5) internal successors, (9550), 20 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:18:59,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:18:59,058 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:18:59,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 11:18:59,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:59,264 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:18:59,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:18:59,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1612535530, now seen corresponding path program 2 times [2023-08-30 11:18:59,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:18:59,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105537169] [2023-08-30 11:18:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:18:59,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:18:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:18:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:18:59,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:18:59,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105537169] [2023-08-30 11:18:59,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105537169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:18:59,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122481902] [2023-08-30 11:18:59,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:18:59,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:18:59,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:18:59,845 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:18:59,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 11:19:00,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:19:00,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:19:00,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 11:19:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:19:00,150 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 [2023-08-30 11:19:00,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:19:00,369 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 [2023-08-30 11:19:00,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:19:00,423 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 [2023-08-30 11:19:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:19:02,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:19:06,535 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse21 (* c_~j~0 4))) (let ((.cse3 (+ c_~A~0.offset 8 .cse21)) (.cse4 (+ c_~A~0.offset .cse21)) (.cse5 (+ c_~A~0.offset .cse21 4))) (and (forall ((v_ArrVal_1161 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) c_~A~0.base))) (let ((.cse1 (select .cse2 .cse5)) (.cse0 (select .cse2 .cse4))) (or (< 2147483647 (+ c_~bag2~0 .cse0)) (< (+ c_~bag2~0 .cse0 2147483648) 0) (< 2147483647 (+ c_~bag2~0 .cse1 .cse0)) (< (+ c_~bag2~0 .cse1 .cse0 2147483648) 0) (< (+ 9223372039002259455 .cse0) 0) (< 0 (+ (select .cse2 .cse3) 9223372039002259456)) (<= 0 .cse0))))) (forall ((v_ArrVal_1161 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) c_~A~0.base))) (let ((.cse7 (select .cse8 .cse5)) (.cse6 (select .cse8 .cse4))) (or (< 2147483647 (+ c_~bag2~0 .cse6)) (< 4294967295 .cse6) (< (+ c_~bag2~0 .cse6 2147483648) 0) (< 2147483647 (+ c_~bag2~0 .cse7 .cse6)) (< (+ c_~bag2~0 .cse7 .cse6 2147483648) 0) (< 0 (+ (select .cse8 .cse3) 9223372039002259456)) (< .cse6 0))))) (or (< (+ c_~bag2~0 c_~sum2~0 2147483648) 0) (< 2147483647 (+ c_~bag2~0 c_~sum2~0)) (< 4294967295 c_~bag2~0) (and (forall ((v_ArrVal_1161 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) c_~A~0.base))) (let ((.cse9 (select .cse11 .cse5)) (.cse10 (select .cse11 .cse4))) (or (< 2147483647 (+ .cse9 .cse10)) (< 2147483647 (+ c_~bag2~0 .cse10)) (< (+ c_~bag2~0 c_~sum2~0 .cse10 2147483648) 0) (< (+ c_~bag2~0 .cse10 2147483648) 0) (< (+ .cse9 .cse10 2147483648) 0) (< 4294967295 .cse9) (< 0 (+ (select .cse11 .cse3) 9223372039002259456)) (< 0 .cse10))))) (forall ((v_ArrVal_1161 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) c_~A~0.base))) (let ((.cse12 (select .cse14 .cse5)) (.cse13 (select .cse14 .cse4))) (or (< 2147483647 (+ .cse12 .cse13)) (< 2147483647 (+ c_~bag2~0 .cse13)) (< (+ c_~bag2~0 .cse13 2147483648) 0) (< (+ .cse12 .cse13 2147483648) 0) (< 0 (+ (select .cse14 .cse3) 9223372039002259456)) (< 2147483647 (+ c_~bag2~0 c_~sum2~0 .cse13)) (< .cse13 0))))) (forall ((v_ArrVal_1161 (Array Int Int))) (let ((.cse17 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) c_~A~0.base))) (let ((.cse16 (select .cse17 .cse5)) (.cse15 (select .cse17 .cse4))) (or (< 2147483647 (+ c_~bag2~0 .cse15)) (< c_~bag2~0 (+ .cse16 1)) (< (+ .cse16 .cse15 2147483648) 0) (< 0 (+ (select .cse17 .cse3) 9223372039002259456)) (< 0 .cse15))))) (forall ((v_ArrVal_1161 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) c_~A~0.base))) (let ((.cse19 (select .cse20 .cse5)) (.cse18 (select .cse20 .cse4))) (or (< 2147483647 (+ c_~bag2~0 .cse18)) (< 4294967295 .cse18) (< c_~bag2~0 (+ .cse19 1)) (< (+ .cse19 .cse18 2147483648) 0) (< 0 (+ (select .cse20 .cse3) 9223372039002259456)) (< .cse18 0)))))))))) is different from false [2023-08-30 11:19:06,834 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_1161 (Array Int Int)) (v_ArrVal_1160 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1160) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse2 (select .cse0 .cse4)) (.cse3 (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< 0 (+ (select .cse0 .cse1) 9223372039002259456)) (< (+ .cse2 .cse3 2147483648) 0) (< 0 .cse3) (< 2147483647 (+ .cse2 .cse3)) (< (+ .cse3 2147483648) 0))))) (forall ((v_ArrVal_1161 (Array Int Int)) (v_ArrVal_1160 (Array Int Int))) (let ((.cse5 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1160) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse6 (select .cse5 .cse4)) (.cse7 (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< 0 (+ (select .cse5 .cse1) 9223372039002259456)) (< (+ .cse6 .cse7 2147483648) 0) (< 2147483647 (+ .cse6 .cse7)) (<= 0 .cse7) (< (+ .cse7 2147483648) 0))))) (forall ((v_ArrVal_1161 (Array Int Int)) (v_ArrVal_1160 (Array Int Int))) (let ((.cse8 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1160) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse9 (select .cse8 .cse4)) (.cse10 (select .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< 0 (+ (select .cse8 .cse1) 9223372039002259456)) (< (+ .cse9 .cse10 2147483648) 0) (< 2147483647 (+ .cse9 .cse10)) (< 2147483647 .cse10) (< .cse10 0))))) (forall ((v_ArrVal_1161 (Array Int Int)) (v_ArrVal_1160 (Array Int Int))) (let ((.cse12 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1160) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse11 (select .cse12 .cse4)) (.cse13 (select .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< 0 (+ .cse11 1)) (< 0 (+ (select .cse12 .cse1) 9223372039002259456)) (< (+ .cse11 .cse13 2147483648) 0) (< 0 .cse13))))) (forall ((v_ArrVal_1161 (Array Int Int)) (v_ArrVal_1160 (Array Int Int))) (let ((.cse15 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1160) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1161) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse14 (select .cse15 .cse4)) (.cse16 (select .cse15 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< 0 (+ .cse14 1)) (< 0 (+ (select .cse15 .cse1) 9223372039002259456)) (< (+ .cse14 .cse16 2147483648) 0) (< 2147483647 .cse16) (< .cse16 0))))))) is different from false [2023-08-30 11:19:06,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:06,884 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 851 treesize of output 480 [2023-08-30 11:19:06,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:06,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1982 treesize of output 1806 [2023-08-30 11:19:07,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:07,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1428 treesize of output 1392 [2023-08-30 11:19:07,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:07,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1392 treesize of output 1374 [2023-08-30 11:19:07,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:07,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1374 treesize of output 1334 [2023-08-30 11:19:07,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:07,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1334 treesize of output 1314 [2023-08-30 11:19:07,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:07,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1314 treesize of output 1294 [2023-08-30 11:19:07,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:07,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1294 treesize of output 1254 [2023-08-30 11:19:07,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:07,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1254 treesize of output 1222 [2023-08-30 11:19:07,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:07,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1222 treesize of output 1182 [2023-08-30 11:19:07,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:07,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1182 treesize of output 1162 [2023-08-30 11:19:07,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:07,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1162 treesize of output 1146 [2023-08-30 11:19:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 11:19:08,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122481902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:19:08,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:19:08,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 11:19:08,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915933880] [2023-08-30 11:19:08,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:19:08,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:19:08,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:19:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:19:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=492, Unknown=2, NotChecked=90, Total=650 [2023-08-30 11:19:08,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 441 out of 1270 [2023-08-30 11:19:08,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 490 transitions, 11101 flow. Second operand has 26 states, 26 states have (on average 442.2692307692308) internal successors, (11499), 26 states have internal predecessors, (11499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:08,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:19:08,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 441 of 1270 [2023-08-30 11:19:08,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:19:25,158 INFO L130 PetriNetUnfolder]: 21516/34180 cut-off events. [2023-08-30 11:19:25,158 INFO L131 PetriNetUnfolder]: For 629848/629848 co-relation queries the response was YES. [2023-08-30 11:19:25,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289187 conditions, 34180 events. 21516/34180 cut-off events. For 629848/629848 co-relation queries the response was YES. Maximal size of possible extension queue 1559. Compared 272792 event pairs, 608 based on Foata normal form. 0/31886 useless extension candidates. Maximal degree in co-relation 289123. Up to 10107 conditions per place. [2023-08-30 11:19:25,550 INFO L137 encePairwiseOnDemand]: 1261/1270 looper letters, 3408 selfloop transitions, 49 changer transitions 103/3560 dead transitions. [2023-08-30 11:19:25,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 3560 transitions, 84577 flow [2023-08-30 11:19:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 11:19:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 11:19:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 14631 transitions. [2023-08-30 11:19:25,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36001476377952757 [2023-08-30 11:19:25,559 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 14631 transitions. [2023-08-30 11:19:25,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 14631 transitions. [2023-08-30 11:19:25,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:19:25,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 14631 transitions. [2023-08-30 11:19:25,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 457.21875) internal successors, (14631), 32 states have internal predecessors, (14631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:25,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 1270.0) internal successors, (41910), 33 states have internal predecessors, (41910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:25,587 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 1270.0) internal successors, (41910), 33 states have internal predecessors, (41910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:25,587 INFO L175 Difference]: Start difference. First operand has 219 places, 490 transitions, 11101 flow. Second operand 32 states and 14631 transitions. [2023-08-30 11:19:25,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 3560 transitions, 84577 flow [2023-08-30 11:19:26,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 3560 transitions, 84544 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-08-30 11:19:26,981 INFO L231 Difference]: Finished difference. Result has 244 places, 519 transitions, 11509 flow [2023-08-30 11:19:26,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=11074, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11509, PETRI_PLACES=244, PETRI_TRANSITIONS=519} [2023-08-30 11:19:26,982 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 170 predicate places. [2023-08-30 11:19:26,982 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 519 transitions, 11509 flow [2023-08-30 11:19:26,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 442.2692307692308) internal successors, (11499), 26 states have internal predecessors, (11499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:26,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:19:26,984 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:19:26,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 11:19:27,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-30 11:19:27,190 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:19:27,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:19:27,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1612535640, now seen corresponding path program 2 times [2023-08-30 11:19:27,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:19:27,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406262888] [2023-08-30 11:19:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:19:27,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:19:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:19:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:19:27,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:19:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406262888] [2023-08-30 11:19:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406262888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:19:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053018029] [2023-08-30 11:19:27,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:19:27,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:19:27,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:19:27,619 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:19:27,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 11:19:27,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:19:27,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:19:27,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 11:19:27,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:19:27,948 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 [2023-08-30 11:19:28,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:19:28,151 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 [2023-08-30 11:19:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:19:28,191 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 [2023-08-30 11:19:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:19:30,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:19:34,589 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_1203 (Array Int Int)) (v_ArrVal_1202 (Array Int Int))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1202) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1203) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (select .cse2 .cse4))) (or (< (+ .cse0 .cse1 2147483648) 0) (< (select .cse2 .cse3) 4294967296) (<= 0 .cse0) (< 0 (+ .cse1 1)))))) (forall ((v_ArrVal_1203 (Array Int Int)) (v_ArrVal_1202 (Array Int Int))) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1202) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1203) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse5 (select .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (select .cse7 .cse4))) (or (< .cse5 0) (< (+ .cse5 .cse6 2147483648) 0) (< 2147483647 .cse5) (< (select .cse7 .cse3) 4294967296) (< 0 (+ .cse6 1)))))) (forall ((v_ArrVal_1203 (Array Int Int)) (v_ArrVal_1202 (Array Int Int))) (let ((.cse10 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1202) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1203) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse9 (select .cse10 .cse4)) (.cse8 (select .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< (+ .cse8 .cse9 2147483648) 0) (< 2147483647 (+ .cse8 .cse9)) (< (+ .cse8 2147483648) 0) (< (select .cse10 .cse3) 4294967296) (<= 0 .cse8))))) (forall ((v_ArrVal_1203 (Array Int Int)) (v_ArrVal_1202 (Array Int Int))) (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1202) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1203) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse12 (select .cse13 .cse4)) (.cse11 (select .cse13 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< .cse11 0) (< (+ .cse11 .cse12 2147483648) 0) (< 2147483647 (+ .cse11 .cse12)) (< 2147483647 .cse11) (< (select .cse13 .cse3) 4294967296))))) (forall ((v_ArrVal_1203 (Array Int Int)) (v_ArrVal_1202 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1202) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1203) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse15 (select .cse16 .cse4)) (.cse14 (select .cse16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< (+ .cse14 .cse15 2147483648) 0) (< 2147483647 (+ .cse14 .cse15)) (< (+ .cse14 2147483648) 0) (< 2147483647 .cse14) (< (select .cse16 .cse3) 4294967296))))))) is different from false [2023-08-30 11:19:34,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,640 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 841 treesize of output 470 [2023-08-30 11:19:34,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2234 treesize of output 2032 [2023-08-30 11:19:34,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1388 treesize of output 1372 [2023-08-30 11:19:34,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1372 treesize of output 1340 [2023-08-30 11:19:34,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1340 treesize of output 1300 [2023-08-30 11:19:34,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1300 treesize of output 1260 [2023-08-30 11:19:34,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1260 treesize of output 1240 [2023-08-30 11:19:34,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1240 treesize of output 1220 [2023-08-30 11:19:34,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1220 treesize of output 1200 [2023-08-30 11:19:34,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1200 treesize of output 1160 [2023-08-30 11:19:34,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:34,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1160 treesize of output 1124 [2023-08-30 11:19:35,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:35,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1124 treesize of output 1106 [2023-08-30 11:19:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 11:19:35,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053018029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:19:35,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:19:35,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 11:19:35,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554050688] [2023-08-30 11:19:35,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:19:35,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:19:35,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:19:35,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:19:35,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=532, Unknown=5, NotChecked=46, Total=650 [2023-08-30 11:19:35,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 445 out of 1270 [2023-08-30 11:19:35,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 519 transitions, 11509 flow. Second operand has 26 states, 26 states have (on average 446.2692307692308) internal successors, (11603), 26 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:35,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:19:35,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 445 of 1270 [2023-08-30 11:19:35,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:19:48,680 INFO L130 PetriNetUnfolder]: 20511/32525 cut-off events. [2023-08-30 11:19:48,680 INFO L131 PetriNetUnfolder]: For 588829/588829 co-relation queries the response was YES. [2023-08-30 11:19:48,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284505 conditions, 32525 events. 20511/32525 cut-off events. For 588829/588829 co-relation queries the response was YES. Maximal size of possible extension queue 1454. Compared 255725 event pairs, 1260 based on Foata normal form. 650/30881 useless extension candidates. Maximal degree in co-relation 284441. Up to 8533 conditions per place. [2023-08-30 11:19:49,037 INFO L137 encePairwiseOnDemand]: 1261/1270 looper letters, 3045 selfloop transitions, 42 changer transitions 92/3179 dead transitions. [2023-08-30 11:19:49,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 3179 transitions, 77008 flow [2023-08-30 11:19:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:19:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:19:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 7827 transitions. [2023-08-30 11:19:49,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36252894858730894 [2023-08-30 11:19:49,042 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 7827 transitions. [2023-08-30 11:19:49,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 7827 transitions. [2023-08-30 11:19:49,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:19:49,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 7827 transitions. [2023-08-30 11:19:49,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 460.4117647058824) internal successors, (7827), 17 states have internal predecessors, (7827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:49,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 1270.0) internal successors, (22860), 18 states have internal predecessors, (22860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:49,057 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 1270.0) internal successors, (22860), 18 states have internal predecessors, (22860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:49,057 INFO L175 Difference]: Start difference. First operand has 244 places, 519 transitions, 11509 flow. Second operand 17 states and 7827 transitions. [2023-08-30 11:19:49,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 3179 transitions, 77008 flow [2023-08-30 11:19:50,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 3179 transitions, 76848 flow, removed 36 selfloop flow, removed 14 redundant places. [2023-08-30 11:19:50,645 INFO L231 Difference]: Finished difference. Result has 246 places, 517 transitions, 11405 flow [2023-08-30 11:19:50,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=11321, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=11405, PETRI_PLACES=246, PETRI_TRANSITIONS=517} [2023-08-30 11:19:50,645 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 172 predicate places. [2023-08-30 11:19:50,645 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 517 transitions, 11405 flow [2023-08-30 11:19:50,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 446.2692307692308) internal successors, (11603), 26 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:19:50,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:19:50,647 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:19:50,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 11:19:50,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:19:50,849 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:19:50,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:19:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1612535645, now seen corresponding path program 2 times [2023-08-30 11:19:50,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:19:50,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486738536] [2023-08-30 11:19:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:19:50,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:19:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:19:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:19:51,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:19:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486738536] [2023-08-30 11:19:51,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486738536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:19:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908261484] [2023-08-30 11:19:51,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:19:51,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:19:51,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:19:51,581 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:19:51,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 11:19:51,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:19:51,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:19:51,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 11:19:51,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:19:51,982 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 [2023-08-30 11:19:52,018 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 19 treesize of output 18 [2023-08-30 11:19:52,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:19:52,086 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 [2023-08-30 11:19:52,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:19:52,272 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 [2023-08-30 11:19:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:19:54,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:19:58,984 WARN L839 $PredicateComparison]: unable to prove that (or (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse6 (<= c_~N~0 2)) (.cse5 (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (or (forall ((v_ArrVal_1247 (Array Int Int)) (v_ArrVal_1246 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1246) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1247) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse0 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (select .cse3 .cse5)) (.cse1 (select .cse3 .cse4))) (or (< 2147483647 (+ .cse0 .cse1)) (< 0 .cse2) (< .cse0 c_~cap2~0) (< (+ .cse0 2147483648) 0) (<= (+ .cse2 .cse1) 2147483647))))) .cse6) (or .cse6 (forall ((v_ArrVal_1247 (Array Int Int)) (v_ArrVal_1246 (Array Int Int))) (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1246) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1247) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse9 (select .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse10 (select .cse11 .cse4))) (let ((.cse7 (+ .cse9 .cse10)) (.cse8 (select .cse11 .cse5))) (or (< 2147483647 .cse7) (< 0 .cse8) (<= c_~cap2~0 .cse9) (< (+ .cse9 2147483648) 0) (< .cse7 c_~cap2~0) (<= (+ .cse8 .cse10) 2147483647)))))))))) is different from false [2023-08-30 11:19:59,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:59,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 554 treesize of output 294 [2023-08-30 11:19:59,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:59,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1227 treesize of output 1151 [2023-08-30 11:19:59,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 688 treesize of output 660 [2023-08-30 11:19:59,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 660 treesize of output 604 [2023-08-30 11:19:59,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 604 treesize of output 560 [2023-08-30 11:19:59,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 560 treesize of output 538 [2023-08-30 11:19:59,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:19:59,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 582 treesize of output 568 [2023-08-30 11:20:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-30 11:20:01,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908261484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:20:01,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:20:01,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 11:20:01,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741928926] [2023-08-30 11:20:01,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:20:01,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:20:01,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:20:01,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:20:01,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=502, Unknown=6, NotChecked=46, Total=650 [2023-08-30 11:20:02,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 441 out of 1270 [2023-08-30 11:20:02,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 517 transitions, 11405 flow. Second operand has 26 states, 26 states have (on average 442.2692307692308) internal successors, (11499), 26 states have internal predecessors, (11499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:20:02,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:20:02,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 441 of 1270 [2023-08-30 11:20:02,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:20:25,922 WARN L222 SmtUtils]: Spent 22.75s on a formula simplification. DAG size of input: 130 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:20:45,033 WARN L222 SmtUtils]: Spent 18.66s on a formula simplification. DAG size of input: 131 DAG size of output: 112 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:20:57,963 WARN L222 SmtUtils]: Spent 12.66s on a formula simplification. DAG size of input: 149 DAG size of output: 147 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:21:18,910 WARN L222 SmtUtils]: Spent 20.74s on a formula simplification. DAG size of input: 128 DAG size of output: 124 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:21:52,712 WARN L222 SmtUtils]: Spent 32.77s on a formula simplification. DAG size of input: 149 DAG size of output: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:22:13,392 WARN L222 SmtUtils]: Spent 20.60s on a formula simplification. DAG size of input: 111 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:22:42,492 WARN L222 SmtUtils]: Spent 28.97s on a formula simplification. DAG size of input: 122 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:23:01,786 WARN L222 SmtUtils]: Spent 18.74s on a formula simplification. DAG size of input: 155 DAG size of output: 155 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:23:23,905 WARN L222 SmtUtils]: Spent 20.63s on a formula simplification. DAG size of input: 112 DAG size of output: 108 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:23:51,781 WARN L222 SmtUtils]: Spent 26.67s on a formula simplification. DAG size of input: 118 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:24:07,698 INFO L130 PetriNetUnfolder]: 27016/43584 cut-off events. [2023-08-30 11:24:07,699 INFO L131 PetriNetUnfolder]: For 820382/820382 co-relation queries the response was YES. [2023-08-30 11:24:08,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353921 conditions, 43584 events. 27016/43584 cut-off events. For 820382/820382 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 362944 event pairs, 1842 based on Foata normal form. 1988/42972 useless extension candidates. Maximal degree in co-relation 353861. Up to 7500 conditions per place. [2023-08-30 11:24:08,355 INFO L137 encePairwiseOnDemand]: 1261/1270 looper letters, 5366 selfloop transitions, 56 changer transitions 125/5547 dead transitions. [2023-08-30 11:24:08,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 5547 transitions, 131898 flow [2023-08-30 11:24:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 11:24:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 11:24:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 21530 transitions. [2023-08-30 11:24:08,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3606969341598258 [2023-08-30 11:24:08,365 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 21530 transitions. [2023-08-30 11:24:08,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 21530 transitions. [2023-08-30 11:24:08,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:24:08,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 21530 transitions. [2023-08-30 11:24:08,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 458.0851063829787) internal successors, (21530), 47 states have internal predecessors, (21530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:08,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 1270.0) internal successors, (60960), 48 states have internal predecessors, (60960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:08,410 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 1270.0) internal successors, (60960), 48 states have internal predecessors, (60960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:08,410 INFO L175 Difference]: Start difference. First operand has 246 places, 517 transitions, 11405 flow. Second operand 47 states and 21530 transitions. [2023-08-30 11:24:08,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 5547 transitions, 131898 flow [2023-08-30 11:24:10,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 5547 transitions, 131831 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 11:24:10,431 INFO L231 Difference]: Finished difference. Result has 286 places, 530 transitions, 11607 flow [2023-08-30 11:24:10,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=11293, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=11607, PETRI_PLACES=286, PETRI_TRANSITIONS=530} [2023-08-30 11:24:10,432 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 212 predicate places. [2023-08-30 11:24:10,432 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 530 transitions, 11607 flow [2023-08-30 11:24:10,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 442.2692307692308) internal successors, (11499), 26 states have internal predecessors, (11499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:10,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:24:10,434 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:24:10,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 11:24:10,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:24:10,644 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:24:10,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:24:10,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1612535638, now seen corresponding path program 3 times [2023-08-30 11:24:10,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:24:10,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786421280] [2023-08-30 11:24:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:24:10,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:24:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:24:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:24:11,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:24:11,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786421280] [2023-08-30 11:24:11,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786421280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:24:11,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939379773] [2023-08-30 11:24:11,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:24:11,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:24:11,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:24:11,389 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:24:11,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 11:24:11,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:24:11,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:24:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 11:24:11,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:24:11,800 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 [2023-08-30 11:24:11,832 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 0 case distinctions, treesize of input 25 treesize of output 24 [2023-08-30 11:24:11,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:24:11,892 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 [2023-08-30 11:24:11,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:24:11,935 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 [2023-08-30 11:24:13,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:24:13,947 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 549 treesize of output 475 [2023-08-30 11:24:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:24:14,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:24:17,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:24:17,973 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 139 treesize of output 84 [2023-08-30 11:24:17,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:24:17,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 213 treesize of output 201 [2023-08-30 11:24:17,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:24:17,996 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 180 treesize of output 156 [2023-08-30 11:24:18,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:24:18,006 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 83 treesize of output 71 [2023-08-30 11:24:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:24:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939379773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:24:18,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:24:18,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 11:24:18,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745434891] [2023-08-30 11:24:18,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:24:18,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:24:18,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:24:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:24:18,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=545, Unknown=2, NotChecked=0, Total=650 [2023-08-30 11:24:20,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:24:22,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:24:24,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:24:26,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:24:28,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:24:30,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:24:32,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:24:34,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:24:34,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 441 out of 1270 [2023-08-30 11:24:34,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 530 transitions, 11607 flow. Second operand has 26 states, 26 states have (on average 442.2692307692308) internal successors, (11499), 26 states have internal predecessors, (11499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:34,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:24:34,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 441 of 1270 [2023-08-30 11:24:34,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:24:47,797 WARN L222 SmtUtils]: Spent 12.34s on a formula simplification. DAG size of input: 115 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:24:58,150 WARN L222 SmtUtils]: Spent 10.22s on a formula simplification. DAG size of input: 72 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:25:05,571 WARN L222 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 70 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:25:21,474 INFO L130 PetriNetUnfolder]: 26755/43097 cut-off events. [2023-08-30 11:25:21,474 INFO L131 PetriNetUnfolder]: For 779369/779369 co-relation queries the response was YES. [2023-08-30 11:25:21,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356790 conditions, 43097 events. 26755/43097 cut-off events. For 779369/779369 co-relation queries the response was YES. Maximal size of possible extension queue 1759. Compared 357347 event pairs, 982 based on Foata normal form. 344/39923 useless extension candidates. Maximal degree in co-relation 356728. Up to 9694 conditions per place. [2023-08-30 11:25:22,040 INFO L137 encePairwiseOnDemand]: 1260/1270 looper letters, 2733 selfloop transitions, 138 changer transitions 83/2954 dead transitions. [2023-08-30 11:25:22,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 2954 transitions, 70266 flow [2023-08-30 11:25:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 11:25:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 11:25:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 13220 transitions. [2023-08-30 11:25:22,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3589465109964703 [2023-08-30 11:25:22,048 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 13220 transitions. [2023-08-30 11:25:22,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 13220 transitions. [2023-08-30 11:25:22,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:25:22,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 13220 transitions. [2023-08-30 11:25:22,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 455.86206896551727) internal successors, (13220), 29 states have internal predecessors, (13220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:25:22,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 1270.0) internal successors, (38100), 30 states have internal predecessors, (38100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:25:22,074 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 1270.0) internal successors, (38100), 30 states have internal predecessors, (38100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:25:22,074 INFO L175 Difference]: Start difference. First operand has 286 places, 530 transitions, 11607 flow. Second operand 29 states and 13220 transitions. [2023-08-30 11:25:22,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 2954 transitions, 70266 flow [2023-08-30 11:25:23,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 2954 transitions, 70214 flow, removed 3 selfloop flow, removed 13 redundant places. [2023-08-30 11:25:23,673 INFO L231 Difference]: Finished difference. Result has 300 places, 616 transitions, 13575 flow [2023-08-30 11:25:23,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=11470, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=13575, PETRI_PLACES=300, PETRI_TRANSITIONS=616} [2023-08-30 11:25:23,674 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 226 predicate places. [2023-08-30 11:25:23,674 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 616 transitions, 13575 flow [2023-08-30 11:25:23,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 442.2692307692308) internal successors, (11499), 26 states have internal predecessors, (11499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:25:23,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:25:23,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2023-08-30 11:25:23,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 11:25:23,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-30 11:25:23,886 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:25:23,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:25:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -470812683, now seen corresponding path program 3 times [2023-08-30 11:25:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:25:23,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442957704] [2023-08-30 11:25:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:25:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:25:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:25:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:25:24,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:25:24,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442957704] [2023-08-30 11:25:24,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442957704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:25:24,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621620471] [2023-08-30 11:25:24,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:25:24,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:25:24,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:25:24,049 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:25:24,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 11:25:24,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:25:24,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:25:24,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 11:25:24,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:25:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:25:24,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:25:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:25:24,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621620471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:25:24,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:25:24,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-30 11:25:24,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908460947] [2023-08-30 11:25:24,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:25:24,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 11:25:24,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:25:24,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 11:25:24,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2023-08-30 11:25:24,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1270 [2023-08-30 11:25:24,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 616 transitions, 13575 flow. Second operand has 21 states, 21 states have (on average 488.3333333333333) internal successors, (10255), 21 states have internal predecessors, (10255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:25:24,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:25:24,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1270 [2023-08-30 11:25:24,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:25:40,173 INFO L130 PetriNetUnfolder]: 25267/40555 cut-off events. [2023-08-30 11:25:40,173 INFO L131 PetriNetUnfolder]: For 541484/541484 co-relation queries the response was YES. [2023-08-30 11:25:40,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344183 conditions, 40555 events. 25267/40555 cut-off events. For 541484/541484 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 317115 event pairs, 13710 based on Foata normal form. 177/36754 useless extension candidates. Maximal degree in co-relation 344119. Up to 33200 conditions per place. [2023-08-30 11:25:40,799 INFO L137 encePairwiseOnDemand]: 1257/1270 looper letters, 538 selfloop transitions, 23 changer transitions 113/674 dead transitions. [2023-08-30 11:25:40,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 674 transitions, 14775 flow [2023-08-30 11:25:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:25:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:25:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5939 transitions. [2023-08-30 11:25:40,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896981627296588 [2023-08-30 11:25:40,803 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5939 transitions. [2023-08-30 11:25:40,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5939 transitions. [2023-08-30 11:25:40,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:25:40,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5939 transitions. [2023-08-30 11:25:40,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 494.9166666666667) internal successors, (5939), 12 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:25:40,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1270.0) internal successors, (16510), 13 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:25:40,814 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1270.0) internal successors, (16510), 13 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:25:40,814 INFO L175 Difference]: Start difference. First operand has 300 places, 616 transitions, 13575 flow. Second operand 12 states and 5939 transitions. [2023-08-30 11:25:40,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 674 transitions, 14775 flow [2023-08-30 11:25:46,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 674 transitions, 14703 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-08-30 11:25:46,452 INFO L231 Difference]: Finished difference. Result has 302 places, 502 transitions, 11193 flow [2023-08-30 11:25:46,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=12117, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11193, PETRI_PLACES=302, PETRI_TRANSITIONS=502} [2023-08-30 11:25:46,452 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 228 predicate places. [2023-08-30 11:25:46,453 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 502 transitions, 11193 flow [2023-08-30 11:25:46,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 488.3333333333333) internal successors, (10255), 21 states have internal predecessors, (10255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:25:46,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:25:46,454 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 11:25:46,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-30 11:25:46,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 11:25:46,660 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:25:46,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:25:46,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1550999305, now seen corresponding path program 3 times [2023-08-30 11:25:46,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:25:46,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890500267] [2023-08-30 11:25:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:25:46,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:25:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:25:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:25:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:25:46,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890500267] [2023-08-30 11:25:46,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890500267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:25:46,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865711627] [2023-08-30 11:25:46,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:25:46,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:25:46,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:25:46,949 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:25:46,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 11:25:47,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 11:25:47,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:25:47,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 11:25:47,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:25:50,493 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-08-30 11:25:50,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 786 treesize of output 620 [2023-08-30 11:25:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:25:50,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:25:55,455 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 11:25:55,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1082 treesize of output 768 [2023-08-30 11:25:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:25:56,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865711627] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:25:56,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:25:56,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 11:25:56,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651802497] [2023-08-30 11:25:56,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:25:56,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 11:25:56,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:25:56,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 11:25:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2023-08-30 11:25:57,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 1270 [2023-08-30 11:25:57,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 502 transitions, 11193 flow. Second operand has 25 states, 25 states have (on average 477.4) internal successors, (11935), 25 states have internal predecessors, (11935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:25:57,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:25:57,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 1270 [2023-08-30 11:25:57,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:26:08,419 INFO L130 PetriNetUnfolder]: 18737/30851 cut-off events. [2023-08-30 11:26:08,419 INFO L131 PetriNetUnfolder]: For 558246/558246 co-relation queries the response was YES. [2023-08-30 11:26:08,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267350 conditions, 30851 events. 18737/30851 cut-off events. For 558246/558246 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 253193 event pairs, 3646 based on Foata normal form. 344/28709 useless extension candidates. Maximal degree in co-relation 267306. Up to 9670 conditions per place. [2023-08-30 11:26:08,737 INFO L137 encePairwiseOnDemand]: 1261/1270 looper letters, 1314 selfloop transitions, 31 changer transitions 76/1421 dead transitions. [2023-08-30 11:26:08,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1421 transitions, 34222 flow [2023-08-30 11:26:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:26:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:26:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 6849 transitions. [2023-08-30 11:26:08,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38520809898762653 [2023-08-30 11:26:08,741 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 6849 transitions. [2023-08-30 11:26:08,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 6849 transitions. [2023-08-30 11:26:08,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:26:08,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 6849 transitions. [2023-08-30 11:26:08,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 489.2142857142857) internal successors, (6849), 14 states have internal predecessors, (6849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:26:08,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 1270.0) internal successors, (19050), 15 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:26:08,753 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 1270.0) internal successors, (19050), 15 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:26:08,753 INFO L175 Difference]: Start difference. First operand has 302 places, 502 transitions, 11193 flow. Second operand 14 states and 6849 transitions. [2023-08-30 11:26:08,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1421 transitions, 34222 flow [2023-08-30 11:26:10,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1421 transitions, 33908 flow, removed 97 selfloop flow, removed 7 redundant places. [2023-08-30 11:26:10,564 INFO L231 Difference]: Finished difference. Result has 272 places, 481 transitions, 10891 flow [2023-08-30 11:26:10,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1270, PETRI_DIFFERENCE_MINUEND_FLOW=10960, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10891, PETRI_PLACES=272, PETRI_TRANSITIONS=481} [2023-08-30 11:26:10,566 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 198 predicate places. [2023-08-30 11:26:10,566 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 481 transitions, 10891 flow [2023-08-30 11:26:10,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 477.4) internal successors, (11935), 25 states have internal predecessors, (11935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:26:10,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:26:10,568 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2023-08-30 11:26:10,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 11:26:10,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 11:26:10,774 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err20ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err21ASSERT_VIOLATIONINTEGER_OVERFLOW (and 105 more)] === [2023-08-30 11:26:10,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:26:10,775 INFO L85 PathProgramCache]: Analyzing trace with hash 851921966, now seen corresponding path program 4 times [2023-08-30 11:26:10,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:26:10,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624979728] [2023-08-30 11:26:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:26:10,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:26:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:26:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:26:11,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:26:11,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624979728] [2023-08-30 11:26:11,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624979728] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:26:11,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969614707] [2023-08-30 11:26:11,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:26:11,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:26:11,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:26:11,705 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:26:11,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 11:26:12,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:26:12,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:26:12,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 11:26:12,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:26:12,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:26:12,183 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 11:26:12,183 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 29 treesize of output 32 [2023-08-30 11:26:12,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:26:12,281 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 33 treesize of output 35 [2023-08-30 11:26:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:26:12,367 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 33 treesize of output 35 [2023-08-30 11:26:15,893 INFO L321 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2023-08-30 11:26:15,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 834 treesize of output 670 [2023-08-30 11:26:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:26:17,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:26:24,576 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse4 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (<= c_~N~0 3))) (and (or (forall ((v_ArrVal_1406 (Array Int Int)) (v_ArrVal_1407 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1406) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1407) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse1 (select .cse3 .cse5)) (.cse0 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (select .cse3 .cse4))) (or (< (+ 2147483648 .cse0) 0) (< 0 (+ 2147483649 .cse1)) (< (+ .cse1 2147483648 .cse2) 0) (< 2147483647 (+ .cse0 .cse2)))))) .cse6) (or (forall ((v_ArrVal_1406 (Array Int Int)) (v_ArrVal_1407 (Array Int Int))) (let ((.cse10 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1406) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1407) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse8 (select .cse10 .cse5)) (.cse7 (select .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse9 (select .cse10 .cse4))) (or (< (+ 2147483648 .cse7) 0) (< 0 (+ 2147483649 .cse8)) (< (+ .cse8 .cse9) (+ .cse7 1)) (< 2147483647 (+ .cse7 .cse9)))))) .cse6))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) is different from false [2023-08-30 11:26:24,633 WARN L839 $PredicateComparison]: unable to prove that (or (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse4 (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse7 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse8 (<= c_~N~0 3))) (and (or (forall ((v_ArrVal_1406 (Array Int Int)) (v_ArrVal_1404 Int) (v_ArrVal_1407 (Array Int Int))) (let ((.cse3 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse6 .cse7 v_ArrVal_1404)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1406) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1407) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse2 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse0 (select .cse3 .cse5)) (.cse1 (select .cse3 .cse4))) (or (< (+ .cse0 .cse1) (+ .cse2 1)) (< (+ .cse2 2147483648) 0) (< 2147483647 (+ .cse2 .cse0)) (< 0 (+ 2147483649 .cse1)))))) .cse8) (or (forall ((v_ArrVal_1406 (Array Int Int)) (v_ArrVal_1404 Int) (v_ArrVal_1407 (Array Int Int))) (let ((.cse12 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse6 .cse7 v_ArrVal_1404)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1406) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1407) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse9 (select .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse10 (select .cse12 .cse5)) (.cse11 (select .cse12 .cse4))) (or (< (+ .cse9 2147483648) 0) (< (+ .cse10 .cse11 2147483648) 0) (< 2147483647 (+ .cse9 .cse10)) (< 0 (+ 2147483649 .cse11)))))) .cse8)))) is different from false [2023-08-30 11:26:24,717 INFO L321 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2023-08-30 11:26:24,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 445 treesize of output 266 [2023-08-30 11:26:24,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:26:24,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 613 treesize of output 593 [2023-08-30 11:26:24,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 559 treesize of output 515 [2023-08-30 11:26:24,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 515 treesize of output 493 [2023-08-30 11:26:24,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 493 treesize of output 453 [2023-08-30 11:26:24,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 453 treesize of output 433 [2023-08-30 11:26:24,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:26:24,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 449 treesize of output 447 [2023-08-30 11:26:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-08-30 11:26:26,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969614707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:26:26,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:26:26,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 11:26:26,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502107057] [2023-08-30 11:26:26,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:26:26,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 11:26:26,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:26:26,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 11:26:26,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=766, Unknown=3, NotChecked=114, Total=992 [2023-08-30 11:26:26,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 441 out of 1270 [2023-08-30 11:26:26,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 481 transitions, 10891 flow. Second operand has 32 states, 32 states have (on average 442.21875) internal successors, (14151), 32 states have internal predecessors, (14151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:26:26,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:26:26,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 441 of 1270 [2023-08-30 11:26:26,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:26:44,809 WARN L222 SmtUtils]: Spent 16.59s on a formula simplification. DAG size of input: 153 DAG size of output: 143 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:26:52,231 WARN L222 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 155 DAG size of output: 142 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15